Rainfall
type: Concept
version info: 1
deprecated: false
definition: The rate or amount of precipitation (liquid or solid) deposited from the atmosphere.
in scheme: phyto vre thesaurus
alternative label: Precipitation
notation: SDN:A05::EV_RAIN
note: accepted
broader: Abiotic parameter
narrower: CPRPRG01
narrower: CPRRRG01
narrower: CFSN0143
narrower: CFSN0410
narrower: CFSN0559
narrower: CFSN0569
related: MMPH
related: UXMM
date: 2016-06-23 15:58:53.0
authored on: 2016-06-23 15:58:53.0
has current version: http://vocab.nerc.ac.uk/collection/A05/current/EV_RAIN/1/
version: 1
in dataset: void

phyto vre thesaurus
type: ConceptScheme
created: 2025-10-28

Abiotic parameter
type: Concept
definition: Abiotic parameters are physical and chemical environmental factors that influence an ecosystem, such as temperature, light, water, soil, and chemical composition, independent of living organisms.
in scheme: phyto vre thesaurus
broader: Data Template

Data Template
type: Concept
definition: A data template is a standardized structure for organizing and recording data in a consistent and reproducible manner.
in scheme: phyto vre thesaurus
broader: PHYTOPLANKTON VRE
source: https://doi.org/10.1890/0012-9623-90.2.205

Humidity
type: Concept
version info: 1
deprecated: false
definition: The amount of water vapour (relative humidity, dew point temperature) in the atmosphere.
in scheme: phyto vre thesaurus
preferred label: Humidité @fr
notation: SDN:OD1::HUMI
note: accepted
broader: Abiotic parameter
broader: M010
broader: DS05
narrower: surface-vapour
date: 2023-10-16 17:23:15.0
authored on: 2023-10-16 17:23:15.0
has current version: http://vocab.nerc.ac.uk/collection/OD1/current/HUMI/1/
version: 1
in dataset: void

depth
type: Concept
version info: 1
deprecated: false
definition: Depth is the vertical distance below the surface.
in scheme: phyto vre thesaurus
notation: SDN:P07::CFSN0721
note: accepted
broader: Location
narrower: G666
narrower: G809
related: ULAA
date: 2006-09-26 18:12:43.0
authored on: 2006-09-26 18:12:43.0
has current version: http://vocab.nerc.ac.uk/collection/P07/current/CFSN0721/1/
version: 1
in dataset: void

Location
type: Concept
definition: A spatial region or named place.
in scheme: phyto vre thesaurus
broader: Data Template

ALKALINITY
type: Concept
version info: 4
deprecated: false
definition: Quantity (i.e. number of moles) of acid-neutralising bases per unit mass of the water column.
in scheme: phyto vre thesaurus
alternative label: ALKW
notation: SDN:P09::ALKW
note: accepted
broader: Abiotic parameter
related: KGUM
date: 2008-10-20 09:46:46.0
authored on: 2008-10-20 09:46:46.0
has current version: http://vocab.nerc.ac.uk/collection/P09/current/ALKW/4/
version: 4
in dataset: void
has version: http://vocab.nerc.ac.uk/collection/P09/current/ALKW/1/
has version: http://vocab.nerc.ac.uk/collection/P09/current/ALKW/2/
has version: http://vocab.nerc.ac.uk/collection/P09/current/ALKW/3/
modified: 2026-01-21T14:48:30

Arsenic in water body
type: Concept
version info: 1
deprecated: false
definition: Concentration of arsenic per unit volume of the water body.
in scheme: phyto vre thesaurus
alternative label: ARSW
notation: SDN:P09::ARSW
note: accepted
broader: Abiotic parameter
related: UGPL
date: 2016-09-28 17:24:53.0
authored on: 2016-09-28 17:24:53.0
has current version: http://vocab.nerc.ac.uk/collection/P09/current/ARSW/1/
version: 1
in dataset: void

Cadmium in water body
type: Concept
version info: 1
deprecated: false
definition: Concentration of cadmium per unit volume of the water body
in scheme: phyto vre thesaurus
alternative label: CADW
notation: SDN:P09::CADW
note: accepted
broader: Abiotic parameter
related: UGPL
date: 2016-09-28 17:24:53.0
authored on: 2016-09-28 17:24:53.0
has current version: http://vocab.nerc.ac.uk/collection/P09/current/CADW/1/
version: 1
in dataset: void

DISSOLVED ORGANIC CARBON
type: Concept
version info: 3
deprecated: false
definition: The quantity (i.e. number of moles) of organic carbon (i.e. carbon not in carbonate or bicarbonate molecules) dissolved per unit volume of the water column
in scheme: phyto vre thesaurus
alternative label: CORG
notation: SDN:P09::CORG
note: accepted
broader: Abiotic parameter
related: UPOX
date: 2008-10-20 09:24:54.0
authored on: 2008-10-20 09:24:54.0
has current version: http://vocab.nerc.ac.uk/collection/P09/current/CORG/3/
version: 3
in dataset: void
has version: http://vocab.nerc.ac.uk/collection/P09/current/CORG/1/
has version: http://vocab.nerc.ac.uk/collection/P09/current/CORG/2/

DISSOLVED OXYGEN
type: Concept
version info: 3
deprecated: false
definition: Volume of oxygen dissolved per unit volume of the water column.
in scheme: phyto vre thesaurus
alternative label: DOX1
notation: SDN:P09::DOX1
note: accepted
broader: Abiotic parameter
related: UMLL
date: 2008-10-20 10:51:41.0
authored on: 2008-10-20 10:51:41.0
has current version: http://vocab.nerc.ac.uk/collection/P09/current/DOX1/3/
version: 3
in dataset: void
has version: http://vocab.nerc.ac.uk/collection/P09/current/DOX1/1/
has version: http://vocab.nerc.ac.uk/collection/P09/current/DOX1/2/

OXYGEN SATURATION
type: Concept
version info: 3
deprecated: false
definition: The concentration of dissolved oxygen expressed as a proportion of the oxygen concentration in water that is in equilibrium with the atmosphere.
in scheme: phyto vre thesaurus
alternative label: OSAT
notation: SDN:P09::OSAT
note: accepted
broader: Abiotic parameter
related: UPCT
date: 2009-04-08 09:11:19.0
authored on: 2009-04-08 09:11:19.0
has current version: http://vocab.nerc.ac.uk/collection/P09/current/OSAT/3/
version: 3
in dataset: void
has version: http://vocab.nerc.ac.uk/collection/P09/current/OSAT/1/
has version: http://vocab.nerc.ac.uk/collection/P09/current/OSAT/2/

PH
type: Concept
version info: 3
deprecated: false
definition: Minus the log of the hydrogen ion concentration (moles per litre) in the water column.
in scheme: phyto vre thesaurus
notation: SDN:P09::PHPH
note: accepted
broader: Abiotic parameter
related: UUPH
date: 2008-10-20 11:19:32.0
authored on: 2008-10-20 11:19:32.0
has current version: http://vocab.nerc.ac.uk/collection/P09/current/PHPH/3/
version: 3
in dataset: void
has version: http://vocab.nerc.ac.uk/collection/P09/current/PHPH/1/
has version: http://vocab.nerc.ac.uk/collection/P09/current/PHPH/2/
modified: 2026-01-21T12:32:14

PARTICULATE INORGANIC CARBON
type: Concept
version info: 1
deprecated: false
definition: Concentration of inorganic carbon per unit volume of the water body, filtration and method unknown.
in scheme: phyto vre thesaurus
alternative label: PICP
notation: SDN:P09::PICP
note: accepted
broader: Abiotic parameter
related: UMMC
date: 2014-06-30 10:40:39.0
authored on: 2014-06-30 10:40:39.0
has current version: http://vocab.nerc.ac.uk/collection/P09/current/PICP/1/
version: 1
in dataset: void

DISSOLVED INORGANIC NITROGEN
type: Concept
version info: 3
deprecated: false
definition: Quantity (i.e. number of moles) of inorganic nitrogen (i.e. nitrogen not in carbon compounds) dissolved per unit volume of the water column.
in scheme: phyto vre thesaurus
alternative label: TINW
notation: SDN:P09::TINW
note: accepted
broader: Abiotic parameter
related: UPOX
date: 2008-10-20 15:48:39.0
authored on: 2008-10-20 15:48:39.0
has current version: http://vocab.nerc.ac.uk/collection/P09/current/TINW/3/
version: 3
in dataset: void
has version: http://vocab.nerc.ac.uk/collection/P09/current/TINW/1/
has version: http://vocab.nerc.ac.uk/collection/P09/current/TINW/2/

Conductivity
type: Concept
version info: 1
deprecated: false
in scheme: phyto vre thesaurus
notation: SDN:P14::GVAR0165
note: accepted
broader: Abiotic parameter
broader: GTER0093
broader: GTER0115
date: 2004-09-27 10:33:24.0
authored on: 2004-09-27 10:33:24.0
has current version: http://vocab.nerc.ac.uk/collection/P14/current/GVAR0165/1/
version: 1
in dataset: void
modified: 2026-01-21T12:31:28

Turbidity
type: Concept
version info: 1
deprecated: false
definition: The amount (volume or mass) of suspended particule material per amount (volume or mass) of a body of water.
in scheme: phyto vre thesaurus
notation: SDN:P25::TURB
note: accepted
broader: Abiotic parameter
narrower: NEPHIF01
narrower: SPMIMEXX
narrower: SPMIMOXX
narrower: SPMIMSAT
narrower: TSEDBVOL
narrower: TSEDZZZZ
narrower: TURBMOXX
narrower: TURBXXXX
narrower: CF12S23
related: http://vocab.nerc.ac.uk/collection/L05/current/123/
related: http://vocab.nerc.ac.uk/collection/L05/current/124/
related: http://vocab.nerc.ac.uk/collection/L05/current/304/
related: http://vocab.nerc.ac.uk/collection/L06/current/31/
related: http://vocab.nerc.ac.uk/collection/L06/current/65/
related: WC
date: 2012-06-12 11:22:29.0
authored on: 2012-06-12 11:22:29.0
has current version: http://vocab.nerc.ac.uk/collection/P25/current/TURB/1/
version: 1
in dataset: void
modified: 2026-01-21T14:22:32

Silicates
type: Concept
version info: 2
deprecated: false
definition: Concentrations of dissolved inorganic silicon usually as hydrosilicic acid (often called silicate) and biogenic silica.
in scheme: phyto vre thesaurus
notation: SDN:P36::SLCATE
note: accepted
broader: Abiotic parameter
narrower: SIXX
narrower: SLCA
narrower: EPC00008
narrower: CS003128
narrower: CS003151
narrower: CS026903
date: 2025-04-07 11:53:12.0
authored on: 2025-04-07 11:53:12.0
has current version: http://vocab.nerc.ac.uk/collection/P36/current/SLCATE/2/
version: 2
in dataset: void
has version: http://vocab.nerc.ac.uk/collection/P36/current/SLCATE/1/

Sedimentation flux
type: Concept
version info: 1
deprecated: false
definition: The quantity of an entity gravitationally settling through a medium per unit area per unit time.
in scheme: phyto vre thesaurus
notation: SDN:S06::S0600022
note: accepted
broader: Abiotic parameter
broader: S014
narrower: PNFXMIAF
narrower: PNFXMICA
narrower: PNFXMICB
narrower: PNFXMICC
narrower: PNFXMICD
narrower: PNFXMICH
narrower: PNFXMICI
narrower: PNFXMICL
narrower: PNFXMICS
narrower: PNFXMICT
narrower: PNFXMIDB
narrower: PNFXMIDD
narrower: PNFXMIDF
narrower: PNFXMIDL
narrower: PNFXMIDS
narrower: PNFXMIDX
narrower: PNFXMIDY
narrower: PNFXMIFL
narrower: PNFXMIFO
narrower: PNFXMIGD
narrower: PNFXMIGL
narrower: PNFXMIHD
narrower: PNFXMIHE
narrower: PNFXMIHL
narrower: PNFXMILC
narrower: PNFXMILL
narrower: PNFXMINL
narrower: PNFXMINZ
narrower: PNFXMIPD
narrower: PNFXMIPE
narrower: PNFXMIPZ
narrower: PNFXMIRA
narrower: PNFXMIRD
narrower: PNFXMIRL
narrower: PNFXMIRS
narrower: PNFXMISF
narrower: PNFXMISL
narrower: PNFXMIST
narrower: PNFXMITD
narrower: PNFXMITL
narrower: PNFXMITT
narrower: PNFXMIU3
narrower: PNFXMIU9
narrower: PNFXMIUF
date: 2006-02-17 11:19:39.0
authored on: 2006-02-17 11:19:39.0
has current version: http://vocab.nerc.ac.uk/collection/S06/current/S0600022/1/
version: 1
in dataset: void

Salinity
type: Concept
version info: 1
deprecated: false
definition: The mass of sodium chloride dissolved per unit mass of the water column (definition prior to introduction of PSS-78 Practical Salinity Scale).
in scheme: phyto vre thesaurus
notation: SDN:S06::S0600085
note: accepted
broader: Abiotic parameter
broader: S014
narrower: ODSDM021
narrower: SSALAGT1
narrower: SSALBSTX
narrower: SSALPR01
narrower: SSALSG01
narrower: SSALSL01
narrower: SSALST01
date: 2017-09-19 17:18:17.0
authored on: 2017-09-19 17:18:17.0
has current version: http://vocab.nerc.ac.uk/collection/S06/current/S0600085/1/
version: 1
in dataset: void

survey
type: Concept
version info: 1
deprecated: false
definition: Term to be used when the property reported is a characteristic of a survey (for example its area, its duration). A survey is a sampling activity which can be made up of a single or multiple sampling events.
in scheme: phyto vre thesaurus
notation: SDN:S18::S1800109
note: accepted
broader: Event
date: 2023-01-11 09:50:21.0
authored on: 2023-01-11 09:50:21.0
has current version: http://vocab.nerc.ac.uk/collection/S18/current/S1800109/1/
version: 1
in dataset: void

Event
type: Concept
definition: An action that occurs at some location during some time.
in scheme: phyto vre thesaurus
broader: Data Template

PHYTOPLANKTON VRE
type: Concept
definition: The Phytoplankton Virtual Research Environment (PHYTO VRE) supports research on phytoplankton assemblages and their structure, organization, and ecological functions. It integrates data resources, web services, and modelling tools to address both basic and applied studies in phytoplankton ecology, with a level of resolution ranging from individual cells to entire assemblages.
in scheme: phyto vre thesaurus
top concept of: phyto vre thesaurus
alternative label: PHYTO VRE

Calcium
type: Concept
version info: 2
deprecated: false
definition: One of six chemical elements classified as an alkaline earth metal. Its atomic number is 20.
in scheme: phyto vre thesaurus
alternative label: Ca
notation: SDN:S27::CS002921
note: accepted
broader: Abiotic parameter
broader: HVYMTL
broader: S016
narrower: http://vocab.nerc.ac.uk/collection/P01/current/ACCAAE01/
narrower: http://vocab.nerc.ac.uk/collection/P01/current/ACCAAE02/
narrower: ACCAASE1
narrower: ACCAASE2
narrower: ACCAXX01
narrower: ASDCAA01
narrower: ASDCAA02
narrower: ASDCAI01
narrower: ASDCAI02
narrower: ASDCAX01
narrower: CACNAAP2
narrower: CACNAAPC
narrower: CACNAAWF
narrower: CACNICP2
narrower: CACNICPC
narrower: CACNPEXT
narrower: CACNPEXX
narrower: CACNXMXT
narrower: CAWBUKP1
narrower: CAXXAAP1
narrower: CAXXAAP2
narrower: CAXXTG01
narrower: CAXXXFP2
narrower: CAXXXFP3
narrower: http://vocab.nerc.ac.uk/collection/P01/current/CCA88011/
narrower: http://vocab.nerc.ac.uk/collection/P01/current/CCA88223/
narrower: CCI1CAXX
narrower: CCI2CAXX
narrower: CCI3CAXX
narrower: CCI4CAXX
narrower: CNCALE01
narrower: CNCASP01
narrower: ECCAXX01
narrower: GEOLST08
narrower: ICCAXX01
narrower: LM02RUN5
narrower: LMPERUN5
narrower: MCAPP012
narrower: MCASP012
narrower: NEWCXX09
narrower: RNCCAP01
narrower: RNCCAP02
narrower: RNSDCA01
narrower: RNSDCA02
narrower: RWS00023
narrower: RWSSED35
narrower: SEDPWCA1
date: 2021-05-17 21:42:01.0
authored on: 2021-05-17 21:42:01.0
has current version: http://vocab.nerc.ac.uk/collection/S27/current/CS002921/2/
version: 2
in dataset: void
has version: http://vocab.nerc.ac.uk/collection/S27/current/CS002921/1/
modified: 2026-01-21T14:22:17

Complex shape
type: NamedIndividual
type: Concept
definition: Geometric model composed of more than one geometric shape.
in scheme: phyto vre thesaurus
alternative label: Combination of shapes
broader: Shape
broader: c b709e6d3
narrower: c 5783d52b
narrower: c cea9fa6b
related: Atlas of Shapes
mapping loom: complexshape
created: 2023-05-03T16:39:35
source: https://www.phytovre.lifewatchitaly.eu/vre/shapes-groups/
modified: 2026-01-21T14:30:49

Shape
type: NamedIndividual
type: Concept
definition: The approximate shape of an organism.
in scheme: phyto vre thesaurus
alternative label: Cell shape
alternative label: Form
alternative label: Type
broader: Atlas of Shapes
narrower: c b709e6d3
narrower: c 621df9ab
mapping loom: shape
created: 2023-04-18T12:12:23
modified: 2026-01-21T14:26:32

Atlas of Shapes
type: Concept
definition: A web service including a catalogue of geometrical models for calculating biovolume and surface area of phytoplankton taxa. It includes illustrative schemes of simple and complex shapes.
in scheme: phyto vre thesaurus
broader: e-Service
related: Complex shape
related: Simple shape
modified: 2026-01-21T12:20:17

Biovolume
type: NamedIndividual
type: Concept
definition: Volume of an organism (cell or colony). It is calculated according to the geometric equations, after association of geometric shape to the real shape of the organism and measurements of linear dimensions (length, width). It is used for samples that are analysed by imaging systems.
in scheme: phyto vre thesaurus
alternative label: Biov
alternative label: Cell volume
alternative label: V
broader: Biotic parameter
broader: c_73193705
broader: c dc77ca7c
broader: c 6da42e35
mapping loom: biovolume
created: 2024-02-26T11:28:07
source: https://doi.org/10.1046/j.1529-8817.1999.3520403.x
source: Harris, R.P., Wiebe, P.H., Lenz, J., Skjoldal, H.R., Huntley, M. (Eds) ICES Zooplankton Methodology Manual, Academic Press, 684 pp.
modified: 2026-01-21T14:29:04

Biotic parameter
type: Concept
definition: Biotic parameters are environmental factors related to living organisms and their interactions, including competition, predation, mutualism, and population density within an ecosystem.
in scheme: phyto vre thesaurus
broader: Data Template

Benthic
type: NamedIndividual
type: Concept
definition: An organism that lives on, in, or near the bottom of a water body, such as the seabed or the bottom of a freshwater system. This includes habitats in the littoral, sublittoral, and abyssal zones, and may cover areas exposed during low tide. The term may be further subdivided into depth-related benthic zones (e.g., infralittoral, circalittoral, bathyal, abyssal), which can also be used as attributes to describe the organism’s specific vertical distribution.
in scheme: phyto vre thesaurus
alternative label: Benthonic
alternative label: Benthos
broader: Atlas of Phytoplankton
broader: c 41ae8839
mapping loom: benthic
created: 2024-04-08T09:56:31
source: MarLIN, 2006. BIOTIC - Biological Traits Information Catalogue. www.marlin.ac.uk/biotic
modified: 2026-01-21T14:28:45

Atlas of Phytoplankton
type: Concept
definition: A web service for phytoplankton identification and classification. It provides illustrative pages for phytoplankton taxa including taxonomic information with photographs and or synonyms bibliographic references ecological and morphological characteristics and geographical distribution.
in scheme: phyto vre thesaurus
broader: e-Service

Simple shape
type: NamedIndividual
type: Concept
definition: A geometric model composed of a single geometric shape.
in scheme: phyto vre thesaurus
broader: Shape
broader: c b709e6d3
narrower: Cone
narrower: c 0765a0f5
narrower: c 7fe24297
narrower: c_84457450
narrower: c 8a790e56
narrower: c a9623ad1
narrower: c b61358b3
narrower: c c5153870
narrower: c dd0ae42b
narrower: c f093134c
narrower: c fc531894
narrower: c fc6284dd
related: Atlas of Shapes
mapping loom: simpleshape
created: 2023-05-03T16:39:24
source: https://www.phytovre.lifewatchitaly.eu/vre/shapes-groups/
modified: 2026-01-21T14:32:43

Cone
type: NamedIndividual
type: Concept
definition: An organism shape that approximates a cone.
in scheme: phyto vre thesaurus
alternative label: Cone-shaped
alternative label: Conic
alternative label: Conical
alternative label: Coniform
alternative label: Conoid
broader: Simple shape
narrower: c 637cce08
mapping loom: cone
created: 2023-05-10T11:02:57
source: https://www.phytovre.lifewatchitaly.eu/vre/shapes-groups/
modified: 2026-01-21T14:33:12

Transversal striae in 10µm
type: Concept
in scheme: phyto vre thesaurus
broader: Striae in 10 µm

Striae in 10 µm
type: Concept
in scheme: phyto vre thesaurus
broader: Striae

Striae
type: Concept
definition: Fine, parallel lines, rows of areolae, or grooves on the surface of algal cell walls (especially diatom frustules), often used as taxonomic characters.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Distribution
type: NamedIndividual
type: Concept
definition: The distribution of organisms in distinct areas, layers, or zones. Variations in depth and definition occur depending on the source, area, or research purpose.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
broader: c cc244e43
mapping loom: distribution
created: 2024-04-17T12:20:39
source: https://www.marinespecies.org/traits/aphia.php
modified: 2026-01-21T14:25:20

Central striae in 10 µm
type: Concept
in scheme: phyto vre thesaurus
broader: Striae

Pervalvar striae in 10µm
type: Concept
in scheme: phyto vre thesaurus
broader: Striae

Dorsal striae in 10µm
type: Concept
in scheme: phyto vre thesaurus
broader: Striae in 10 µm

Planktonic
type: NamedIndividual
type: Concept
definition: An organism that live in the water column and is passively transported by currents, at least during part of their life.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
broader: c 5554a9e5
mapping loom: planktonic
created: 2025-06-09T19:06:22
modified: 2026-01-21T14:32:37

Carbon content
type: NamedIndividual
type: Concept
definition: Carbon content determined directly as particulate organic carbon of individual organisms or bulk communities, or indirectly by converting biovolume to carbon using empirical or theoretically derived equations.
in scheme: phyto vre thesaurus
broader: Biotic parameter
broader: c_73193705
broader: c efccde31
mapping loom: carboncontent
created: 2024-02-26T12:34:31
source: https://doi.org/10.4319/lo.2000.45.3.0569
modified: 2026-01-21T14:23:47

Colonial
type: NamedIndividual
type: Concept
definition: Any group of organisms, often genetically identical, living together or in close proximity, association. It refers to a group of organisms in which the members act as specialised subunits and are able to function as a single organism.
in scheme: phyto vre thesaurus
alternative label: Coloniality
alternative label: Modular
alternative label: Modularity
broader: Atlas of Phytoplankton
broader: c d0e5801c
mapping loom: colonial
created: 2024-03-06T08:54:18
modified: 2026-01-21T14:30:39

Length of haptonema
type: Concept
in scheme: phyto vre thesaurus
alternative label: Haptonema length
broader: Haptonema

Haptonema
type: Concept
definition: A slender, filament-like organelle found in haptophyte algae, superficially resembling a flagellum but structurally and functionally distinct. The haptonema is not used for locomotion but for attachment, food capture, and sensing the environment.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton

Biomass
type: NamedIndividual
type: Concept
definition: The amount of living organic matter per unit area or per unit volume. It can be expressed in terms of biovolume, weight or carbon content and can be measured at different organisational levels.
in scheme: phyto vre thesaurus
broader: Biotic parameter
created: 2024-09-16T16:10:50
modified: 2026-01-21T16:43:28

Density
type: NamedIndividual
type: Concept
definition: The number of organisms, designated by taxonomic names (e.g. species, genus, family), per unit area or per unit volume.
in scheme: phyto vre thesaurus
alternative label: Absolute density
alternative label: Abundance
broader: Biotic parameter
broader: c 4b89f740
mapping loom: density
created: 2024-09-16T16:01:02
modified: 2026-01-21T14:25:05

Toxicity
type: NamedIndividual
type: Concept
definition: The inherent ability of an organism to produce, accumulate, or release biochemical compounds that are harmful to other organisms, influencing survival, growth, or behavior.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
broader: c 66f5f877
mapping loom: toxicity
created: 2025-09-28T19:24:29
modified: 2026-01-21T14:27:22

Transapical striae in 10µm
type: Concept
in scheme: phyto vre thesaurus
broader: Striae in 10 µm

Aquatic
type: NamedIndividual
type: Concept
definition: Any environment that is primarily water-based.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
broader: c e09ec39c
mapping loom: aquatic
created: 2025-03-07T18:24:29
modified: 2026-01-21T14:23:12

Surface Area
type: NamedIndividual
type: Concept
definition: The area occupied by the organism's surface.
example: For macroalgae, it refers to the surface occupied by the thallus. It can be estimated using colorimetry, image analysis and physical measurement of leaf area (Armstrong et al., 2003).
example: For phytoplankton, it refers to the area of a single cell or colony, after association of geometric shape to the real shape of the organism (Hillebrand et al., 1999).
in scheme: phyto vre thesaurus
alternative label: S
broader: Biotic parameter
broader: c_73193705
broader: c dc77ca7c
broader: c efccde31
mapping loom: surfacearea
created: 2024-02-15T15:32:42
source: https://doi.org/10.1046/j.1529-8817.1999.3520403.x
modified: 2026-01-21T14:26:52

Cell thickness
type: NamedIndividual
type: Concept
definition: Third dimension of a cell, measured perpendicular to its length and width.
in scheme: phyto vre thesaurus
alternative label: Cell height
alternative label: Cellular height
alternative label: Cellular thickness
broader: Linear dimensions
broader: c_73193705
mapping loom: cellthickness
created: 2023-10-04T17:30:52
modified: 2026-01-21T14:29:18

Linear dimensions
type: Concept
definition: Linear dimensions refer to measurements taken along a single straight line, such as diameter, width, height, or length, used to describe the size or spatial extent of an object.
in scheme: phyto vre thesaurus
broader: Biotic parameter

Striae along the setae in 10µm
type: Concept
in scheme: phyto vre thesaurus
broader: Striae in 10 µm

Autotroph
type: NamedIndividual
type: Concept
definition: An organism that can synthesise organic molecules from inorganic sources using energy from light via photosynthesis or from chemical reactions via chemosynthesis.
in scheme: phyto vre thesaurus
alternative label: Autotrophic
alternative label: Autotrophs
alternative label: autotrophic organisms
alternative label: autotrophy
alternative label: photoautotrophs
alternative label: photoautotrophy
alternative label: photosynthetic organisms
alternative label: phototroph
alternative label: phoyoautotrophic organisms
broader: Atlas of Phytoplankton
broader: c 6308d4df
mapping loom: autotroph
created: 2025-03-24T15:04:30
modified: 2026-01-21T14:23:21

Setae per valve
type: Concept
in scheme: phyto vre thesaurus
broader: Setae

Setae
type: Concept
definition: Bristle-like siliceous projections extending from the valves of certain diatoms (e.g., Chaetoceros). Setae can aid in buoyancy, defense, and colony formation, and their length, thickness, and ornamentation are important taxonomic features.
in scheme: phyto vre thesaurus
alternative label: Seta
broader: Atlas of Phytoplankton

Terminal striae in 10 µm
type: Concept
in scheme: phyto vre thesaurus
broader: Striae in 10 µm

Marginal striae in 10 µm
type: Concept
in scheme: phyto vre thesaurus
broader: Striae

Monoraphid
type: Concept
in scheme: phyto vre thesaurus
broader: Raphe
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Raphe
type: Concept
definition: A longitudinal slit in the silica valve of motile diatoms, allowing the secretion of mucilage used for gliding locomotion.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://www.landcareresearch.co.nz/tools-and-resources/identification/freshwater-algae/identifications-guide/glossary
source: http://taxonomic.aad.gov.au/360.html

Striae (apex) in 10µm
type: Concept
in scheme: phyto vre thesaurus
broader: Striae in 10 µm

Coccolith-prismatolith
type: Concept
definition: Coccolith polygonal, may have perforations.
in scheme: phyto vre thesaurus
alternative label: Prismatolith
broader: Coccoliths
source: https://doi.org/10.58998/jnr2297

Coccoliths
type: Concept
definition: Microscopic calcium carbonate plates produced by coccolithophores. Coccoliths are secreted inside the cell and then extruded to cover the cell surface, forming a coccosphere. They occur in different shapes (e.g., calyptroliths, lopadoliths, scapholiths) and are important taxonomic features.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.58998/jnr2297

Genus
type: Concept
definition: The full scientific name of the genus in which the taxon is classified.
in scheme: phyto vre thesaurus
alternative label: genus
broader: Taxon

Taxon
type: Concept
definition: A group of organisms (sensu http://purl.obolibrary.org/obo/OBI_0100026) considered by taxonomists to form a homogeneous unit.
in scheme: phyto vre thesaurus
broader: Data Template

Flagellar pore
type: Concept
definition: An opening on the cell surface through which a flagellum emerges.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton

e-Service
type: Concept
definition: An online software service that enables interoperability between systems and applications via the internet. In the phytoplankton VRE, web services provide access to databases, modeling functions, or interactive data visualization.
in scheme: phyto vre thesaurus
broader: PHYTOPLANKTON VRE

Total Suspended Solids
type: Concept
definition: Total concentration of suspended solid particles in water.
in scheme: phyto vre thesaurus
alternative label: TSS
broader: Abiotic parameter

Potassium
type: Concept
definition: Concentration or amount of potassium ions.
in scheme: phyto vre thesaurus
alternative label: K
alternative label: K⁺
broader: Abiotic parameter

Eutrophic
type: Concept
definition: Refers to waters that are nutrient-rich, with high concentrations of nitrogen and phosphorus, abundant algal and plant growth, reduced transparency, and possible oxygen depletion.
in scheme: phyto vre thesaurus
broader: Water trophic status
source: https://doi.org/10.4319/lo.1977.22.2.0361

Water trophic status
type: Concept
definition: Water trophic status refers to the classification of water bodies based on their nutrient availability and biological productivity, which together determine the capacity of the system to support algal and plant growth.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.4319/lo.1977.22.2.0361

Coccoliths-discolith
type: Concept
definition: Ellipsoidal coccoliths with a raised rim, in some cases the high rim forms a vase or cup-like structure.
in scheme: phyto vre thesaurus
alternative label: Discolith
broader: Coccoliths
source: https://doi.org/10.58998/jnr2297

Valvocopula
type: Concept
definition: The first girdle band of a diatom frustule, directly attached to a valve (epivalve or hypovalve). It is usually distinguished from the other girdle bands by its position and, in some taxa, by its ornamentation.
in scheme: phyto vre thesaurus
broader: Valve
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Valve
type: Concept
definition: One of the two siliceous halves of a diatom frustule. Each valve forms part of the rigid cell wall and is usually highly ornamented with features such as striae, areolae, and raphe. The two valves (epivalve and hypovalve) overlap at their margins and are joined by the girdle (cingulum) to form the complete frustule.
in scheme: phyto vre thesaurus
alternative label: Valves
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Total Nitrogen
type: Concept
definition: Sum of all nitrogen forms (organic, nitrate, nitrite, ammonia) in a sample.
in scheme: phyto vre thesaurus
alternative label: TN
broader: Abiotic parameter

Superfamily
type: Concept
definition: The full scientific name of the superfamily in which the taxon is classified.
in scheme: phyto vre thesaurus
alternative label: superfamily
broader: Taxon

Transapical axis
type: Concept
definition: The axis running perpendicular to the apical axis, across the width of the valve in apical view. Third axis of a bilateral diatom.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Water Body
type: Concept
definition: The name of the water body in which the location occurs.
in scheme: phyto vre thesaurus
alternative label: waterBody
broader: Location

Particulate Organic Carbon
type: Concept
definition: Organic carbon suspended in water as particles, including phytoplankton and detritus, per unit volume of the water column.
in scheme: phyto vre thesaurus
alternative label: POC
broader: Abiotic parameter

Ventral view
type: Concept
definition: The orientation of a phytoplankton cell when observed from the ventral (front) side, usually defined relative to the sulcus (in dinoflagellates) or the main body axis.
in scheme: phyto vre thesaurus
broader: Valve view

Valve view
type: Concept
definition: Orientation of a diatom cell when observed from the side of one of its valves (the flat surface of the epivalve or hypovalve). In this view, the valve face and its ornamentation (striae, areolae, raphe) are visible.
in scheme: phyto vre thesaurus
broader: Valve

Size Class
type: Concept
definition: A web service to analyze and interpret phytoplankton size-class distribution patterns.
in scheme: phyto vre thesaurus
broader: e-Service

Specific Epithet
type: Concept
definition: The name of the first or species epithet of the scientificName.
in scheme: phyto vre thesaurus
alternative label: specificEpithet
broader: Taxon

Class
type: Concept
definition: The full scientific name of the class in which the taxon is classified.
in scheme: phyto vre thesaurus
alternative label: class
broader: Taxon

Coccolith-scapholith
type: Concept
definition: Coccolith rhombohedral, with parallel lines in center.
in scheme: phyto vre thesaurus
alternative label: Scapholith
broader: Coccoliths
source: https://doi.org/10.58998/jnr2297

Chlorophyll Microplankton
type: Concept
definition: Size-fractionated phytoplankton biomass for microplankton.
in scheme: phyto vre thesaurus
alternative label: Chl micro
broader: Chlorophyll a content

Chlorophyll a content
type: Concept
in scheme: phyto vre thesaurus
broader: Biotic parameter

Postcingular plates
type: Concept
definition: Postcingular plates are the thecal plates located immediately below the cingulum, forming the upper portion of the hypotheca.
in scheme: phyto vre thesaurus
broader: Thecal plates
source: https://www.dinophyta.org/morphology-of-dinoflagellates/kofoid-tabulation/
source: Kofoid, C. A. (1909). On the classification of dinoflagellates. Zoologischer Anzeiger, 34, 192–203.
modified: 2026-01-21T12:54:18

Thecal plates
type: Concept
definition: Thecal plates are rigid, cellulose-based structural elements that together form the theca, the protective outer covering of thecate dinoflagellates. They are arranged in a species-specific pattern, and their number, shape, and arrangement define the cell morphology, polarity, and structural organization. The configuration of thecal plates is a primary diagnostic feature in dinoflagellate taxonomy and systematics.
in scheme: phyto vre thesaurus
broader: Thecate
source: https://www.dinophyta.org/morphology-of-dinoflagellates/kofoid-tabulation/
source: Kofoid, C. A. (1909). On the classification of dinoflagellates. Zoologischer Anzeiger, 34, 192–203.
modified: 2026-01-21T12:47:35

Thecate
type: NamedIndividual
type: Concept
definition: An organism possessing cellulose thecal plates.
example: Prorocentrum, Dinophysis, Heterocapsa, Alexandrium.
in scheme: phyto vre thesaurus
alternative label: Armored
alternative label: with teca
broader: Atlas of Phytoplankton
broader: c b0ba7aeb
mapping loom: thecate
created: 2025-09-28T17:16:50
modified: 2026-01-21T16:50:05

Locality
type: Concept
definition: The specific description of the place.
in scheme: phyto vre thesaurus
alternative label: locality
broader: Location

Catalog Number
type: Concept
definition: An identifier (preferably unique) for the record within the data set or collection.
in scheme: phyto vre thesaurus
alternative label: catalogNumber
broader: Occurrence

Occurrence
type: Concept
definition: An existence of a dwc:Organism at a particular place at a particular time.
in scheme: phyto vre thesaurus
broader: Data Template

Primary Production Picoplankton
type: Concept
definition: Primary production for picoplankton.
in scheme: phyto vre thesaurus
alternative label: PP pico
broader: Net Primary Production

Net Primary Production
type: Concept
definition: The rate at which photosynthetic organisms produce net useful chemical energy after accounting for respiration.
in scheme: phyto vre thesaurus
alternative label: NPP
broader: Biotic parameter

Coccoliths-caneolith
type: Concept
definition: Disc- or bowl-shaped coccoliths
in scheme: phyto vre thesaurus
alternative label: Caneolith
broader: Coccoliths
source: https://doi.org/10.58998/jnr2297

Family
type: Concept
definition: The full scientific name of the family in which the taxon is classified.
in scheme: phyto vre thesaurus
alternative label: family
broader: Taxon

Ribs
type: Concept
definition: Radiating ridges or thickened lines on certain thecal plates of dinoflagellates, used as diagnostic features in tabulation.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton

Shannon Index
type: Concept
definition: A diversity index that accounts for both species richness and evenness based on information theory.
in scheme: phyto vre thesaurus
alternative label: H'
broader: Diversity Indices
source: https://doi.org/10.2307/1934352

Diversity Indices
type: Concept
definition: A web service to calculate phytoplankton community indices using different combinations of spatial and temporal levels. Common indices include Shannon, Simpson, and Pielou's Evenness and others.
in scheme: phyto vre thesaurus
broader: e-Service
related: Data analysis

Cluster Analysis
type: Concept
definition: Cluster analysis is a set of exploratory multivariate statistical techniques used for the grouping of samples or species, aiming to classify objects (observations or variables) into clusters based on their similarity or dissimilarity in order to reveal underlying patterns or structures in the data.The grouping is based on a measure of distance or similarity (e.g., Euclidean distance, Manhattan distance, correlation) and is carried out without a priori assumptions regarding the number or structure of the clusters.
in scheme: phyto vre thesaurus
broader: Data analysis
source: https://doi.org/10.1002/9780470977811

Data analysis
type: Concept
definition: Systematic examination of data.
in scheme: phyto vre thesaurus
broader: PHYTOPLANKTON VRE

Antapical horn
type: Concept
definition: A projection extending from the posterior (antapex) of some dinoflagellate cells.
in scheme: phyto vre thesaurus
broader: Antapical plates
source: https://doi.org/10.1017/S0025315400050359
modified: 2026-01-21T12:41:14

Antapical plates
type: Concept
definition: Antapical plates are the posterior-most thecal plates, located at the antapex of the cell. They form the terminal part of the hypotheca and may give rise to antapical spines or horns.
in scheme: phyto vre thesaurus
broader: Thecal plates
source: https://www.dinophyta.org/morphology-of-dinoflagellates/kofoid-tabulation/
source: Kofoid, C. A. (1909). On the classification of dinoflagellates. Zoologischer Anzeiger, 34, 192–203.
modified: 2026-01-21T12:55:18

Mastigonemes
type: Concept
definition: Fine, hair-like projections on the surface of flagella in some algae (e.g., chrysophytes, cryptophytes). They increase the surface area of the flagellum and enhance swimming efficiency.
in scheme: phyto vre thesaurus
broader: Flagella

Flagella
type: Concept
definition: Long, whip-like appendages used for movement or feeding.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton

Total Dissolved Solids
type: Concept
definition: Total concentration of dissolved substances (such as calcium, magnesium, sodium, chlorides, sulfates, and bicarbonates) and small amounts of dissolved organic matter in water.
in scheme: phyto vre thesaurus
alternative label: TDS
broader: Abiotic parameter

Ortho shape
type: Concept
definition: In dinoflagellate morphology, para , meta and ortho are terms used to describe the cell shape based on the relative displacement of the epitheca and hypotheca along the longitudinal axis. In ORTHO shape, epitheca and hypotheca are arranged in a straight, continuous line along the longitudinal axis, with no displacement or offset. The cell appears symmetrical and elongated, with the cingulum encircling the middle.
in scheme: phyto vre thesaurus
broader: Shape

Eyespot
type: Concept
definition: Eyespot (stigma) is a light-sensitive intracellular structure found in some motile phytoplankton, involved in light perception and phototactic orientation.
in scheme: phyto vre thesaurus
alternative label: Stigma
broader: Atlas of Phytoplankton
source: https://doi.org/10.1007/s00299-009-0664-8

Rarefaction Analysis
type: Concept
definition: Rarefaction analysis is a statistical resampling method used to standardize species richness or diversity among samples with different sampling efforts, allowing meaningful comparisons by estimating the expected number of species for a given number of individuals or samples.
in scheme: phyto vre thesaurus
alternative label: Rarefaction
broader: Data analysis
source: https://doi.org/10.1046/j.1461-0248.2001.00230.x
source: https://doi.org/10.2307/1934145

Pyrenoid
type: Concept
definition: A protein-rich body inside chloroplasts where starch or other reserve products are stored.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton

Mesotrophic
type: Concept
definition: Refers to waters with intermediate nutrient levels and productivity, supporting moderate algal and plant growth. Considered transitional between oligotrophic and eutrophic states.
in scheme: phyto vre thesaurus
broader: Water trophic status
source: https://doi.org/10.4319/lo.1977.22.2.0361

Organism Quantity Type
type: Concept
definition: The type of quantification system used for the quantity of organisms.
in scheme: phyto vre thesaurus
alternative label: organismQuantityType
broader: Occurrence

Calyptra
type: Concept
definition: A cap-like structure or covering at the end of a cell or filament, often seen in certain algae and cyanobacteria.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://www.landcareresearch.co.nz/tools-and-resources/identification/freshwater-algae/identifications-guide/glossary

Epitheca
type: Concept
definition: The upper or anterior half of a phytoplankton cell covering (e.g. theca in dinoflagellates, frustule in diatoms), usually the larger portion.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
related: Frustule
source: http://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Frustule
type: Concept
definition: The rigid siliceous cell wall of diatoms, composed of two valves (epivalve and hypovalve) joined by a series of girdle bands (cingulum). The frustule is often intricately ornamented with features such as striae, areolae, and pores, which are important in diatom taxonomy.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9
source: https://doi.org/10.1093/sysbio/41.1.125

Total Phosphorus
type: Concept
definition: Total phosphorus in all forms (organic, inorganic, particulate, dissolved).
in scheme: phyto vre thesaurus
alternative label: TP
broader: Abiotic parameter

Workflow
type: NamedIndividual
type: Concept
definition: The process that is used to produce a specific research result in a concrete domain. A workflow comprises a series of components that are arranged in a directed graph to set the order of execution of such components. Therefore, a workflow is usually a complex process and may involve both automatic and manual procedures for dealing with research objects and documenting them. Workflows may need instantiation in terms of input data and process parameters.
in scheme: phyto vre thesaurus
broader: PHYTOPLANKTON VRE
mapping loom: workflow
created: 2025-06-06T11:28:43
modified: 2026-01-21T14:22:58

Hyaline band
type: Concept
definition: Radiating, unornamented lines or sectors extending from the valve center toward the margin in some diatoms, forming clear radial zones without perforations, striae or areolae.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Pusula
type: Concept
definition: A contractile organelle in some dinoflagellates thought to play a role in osmoregulation.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1038/npg.els.0001977

Hardness
type: Concept
definition: Total concentration of Ca²⁺ and Mg²⁺ ions in water.
in scheme: phyto vre thesaurus
alternative label: Hard
broader: Abiotic parameter

Magnesium
type: Concept
definition: Concentration or amount of magnesium ions.
in scheme: phyto vre thesaurus
alternative label: Mg²⁺
broader: Abiotic parameter

Light intensity (irradiance)
type: Concept
definition: Power of electromagnetic radiation per unit area (light received).
in scheme: phyto vre thesaurus
alternative label: I
alternative label: Irr
alternative label: L
broader: Abiotic parameter

Number of Transects
type: Concept
definition: The number of transects refers to the number of diametral transects counted across the bottom of a sedimentation chamber.
in scheme: phyto vre thesaurus
alternative label: n_transects
broader: Density per Diameter Transects
source: https://doi.org/10.1007/BF00007865
source: https://doi.org/10.1080/05384680.1958.11904091

Density per Diameter Transects
type: Concept
definition: Density by diameter transect counting is a quantitative microscopy method in which organisms settled on the bottom of a sedimentation chamber are counted along one or more transects spanning the chamber diameter.
in scheme: phyto vre thesaurus
broader: Utermöhl Counting Method
source: https://doi.org/10.1007/BF00007865
source: https://doi.org/10.1080/05384680.1958.11904091
modified: 2026-01-21T12:48:44

Utermöhl Counting Method
type: Concept
definition: The Utermöhl method is the standard quantitative technique for phytoplankton counting. Samples are preserved (commonly with Lugol’s iodine), allowed to sediment in counting chambers, and examined using an inverted microscope.
in scheme: phyto vre thesaurus
alternative label: Utermöhl
broader: Data Template
source: https://doi.org/10.1007/BF00007865
source: https://doi.org/10.1080/05384680.1958.11904091

Cingular lists
type: Concept
definition: Thin, plate-like extensions of the theca along the edges of the cingulum in some dinoflagellates.
in scheme: phyto vre thesaurus
broader: Cingulum
source: https://doi.org/10.1038/npg.els.0001977

Cingulum
type: Concept
definition: The equatorial groove of dinoflagellates that contains the transverse flagellum.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1038/npg.els.0001977

Root Mean Square Error
type: Concept
definition: Root Mean Square Error (RMSE) is a widely used metric to evaluate model performance; quantifies average difference between observed and predicted values.
in scheme: phyto vre thesaurus
alternative label: RMSE
broader: Data analysis
source: http://www.jstor.org/stable/24869236
source: https://doi.org/10.5194/gmd-7-1247-2014

Berger-Parker Index
type: Concept
definition: A dominance index that quantifies the relative importance of the most abundant species in a community.
in scheme: phyto vre thesaurus
broader: Diversity Indices
source: https://doi.org/10.1126/science.168.3937.1345

Oblique striae in 10µm
type: Concept
definition: The number of striae (rows of areolae) counted within a 10 µm section when arranged diagonally (obliquely) to the main axes of a diatom valve.
in scheme: phyto vre thesaurus
broader: Striae in 10 µm

Coccolith-lopadolith
type: Concept
definition: Basket or cup-shaped coccoliths with a high rim, opening distally
in scheme: phyto vre thesaurus
alternative label: Lopadolith
broader: Coccoliths
source: https://doi.org/10.58998/jnr2297

Density by Whole Chamber Counting
type: Concept
definition: Density by whole chamber counting is a quantitative microscopy approach in which all organisms settled on the bottom of the sedimentation chamber are counted, rather than a subsample of fields or transects.
in scheme: phyto vre thesaurus
broader: Utermöhl Counting Method
source: https://doi.org/10.1007/BF00007865
source: https://doi.org/10.1080/05384680.1958.11904091

Coccoliths-ceratolith
type: Concept
definition: Horseshoe or wishbone shaped coccoliths.
in scheme: phyto vre thesaurus
alternative label: Ceratolith
broader: Coccoliths
source: https://doi.org/10.58998/jnr2297

Non-metric Multidimensional Scaling
type: Concept
definition: Ordination method that represents pairwise dissimilarities between samples in a low-dimensional space.
in scheme: phyto vre thesaurus
alternative label: NMDS
broader: Diversity Indices
source: https://doi.org/10.1007/BF02289694

Primary Production Microplankton
type: Concept
definition: Primary production for microplankton.
in scheme: phyto vre thesaurus
alternative label: PP micro
broader: Net Primary Production

Meta shape
type: Concept
definition: In dinoflagellate morphology, para , meta and ortho are terms used to describe the cell shape based on the relative displacement of the epitheca and hypotheca along the longitudinal axis. In META shape, Epitheca and hypotheca are offset (displaced) along the longitudinal axis, giving the cell an asymmetrical appearance with displaced halves.
in scheme: phyto vre thesaurus
broader: Shape

Organism Quantity
type: Concept
definition: A number or enumeration value for the quantity of organisms.
in scheme: phyto vre thesaurus
alternative label: organismQuantity
broader: Occurrence

Lower valvae
type: Concept
definition: The lower half of a diatom frustule, usually the smaller valve, which fits partly inside the upper valve (epivalve).
in scheme: phyto vre thesaurus
alternative label: Hypovalve
broader: Valve
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Data Filtering
type: Concept
definition: A web service for cleaning or subsetting raw data and to exclude from the data files taxa based on their ranked distribution in density, biovolume or carbon content.
in scheme: phyto vre thesaurus
broader: e-Service
related: Data analysis

Plastid
type: Concept
definition: A membrane-bound organelle found in algae and plants that contains pigments and is the site of photosynthesis and other biosynthetic processes. In phytoplankton, plastids may contain chlorophylls and accessory pigments, giving cells their characteristic colors.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1111/ppl.12727

Area of Field of View
type: Concept
definition: The area of one microscope field of view at the used magnification.
in scheme: phyto vre thesaurus
alternative label: Area FOV
broader: Diameter of Field of View
source: https://doi.org/10.1080/05384680.1958.11904091

Diameter of Field of View
type: Concept
definition: The diameter of the field of view (FOV) is the linear distance across the circular area visible through a microscope at a given magnification. Used to calculate the field area and estimate the scale of observed specimens.
in scheme: phyto vre thesaurus
alternative label: FOV
alternative label: diameter FOV
broader: Utermöhl Counting Method
source: https://doi.org/10.1080/05384680.1958.11904091

Infrageneric Epithet
type: Concept
definition: The infrageneric part of a binomial name at ranks above species but below genus.
in scheme: phyto vre thesaurus
alternative label: infragenericEpithet
broader: Taxon

Year
type: Concept
definition: The four-digit year in which the event occurred, according to the Common Era Calendar.
in scheme: phyto vre thesaurus
alternative label: year
broader: Event

Dystrophic
type: Concept
definition: Refers to waters enriched with humic substances from decaying organic matter, typically brown in color, acidic, with low availability of nutrients for algae despite high organic content (common in bogs and peatlands).
in scheme: phyto vre thesaurus
broader: Water trophic status
source: https://doi.org/10.4319/lo.1977.22.2.0361

Taxonomic Status
type: Concept
definition: The status of the use of the scientificName as a label for a taxon. Requires taxonomic opinion to define the scope of a taxon. Rules of priority then are used to define the taxonomic status of the nomenclature contained in that scope, combined with the experts opinion. It must be linked to a specific taxonomic reference that defines the concept.
in scheme: phyto vre thesaurus
alternative label: taxonomicStatus
broader: Taxon

Month
type: Concept
definition: The integer month in which the event occurred.
in scheme: phyto vre thesaurus
alternative label: month
broader: Event

Pervalvar axis
type: Concept
definition: The axis running through the center point of the two valves of a diatom.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Coccolith-helicolith
type: Concept
definition: A placolith with a spiral margin
in scheme: phyto vre thesaurus
alternative label: Helicolith
broader: Coccoliths
source: https://doi.org/10.58998/jnr2297

Maximum Photosynthetic Rate
type: Concept
definition: Highest rate of photosynthesis under optimal light conditions.
in scheme: phyto vre thesaurus
broader: Abiotic parameter

Neritic
type: Concept
definition: Refers to organisms inhabiting coastal waters over the continental shelf, typically nutrient-rich and well-lit, as opposed to oceanic or deep-sea zones.
in scheme: phyto vre thesaurus
broader: Distribution

Transparency
type: Concept
definition: Depth of visible light penetration, often measured with Secchi disk.
in scheme: phyto vre thesaurus
alternative label: Secchi disk
alternative label: Transp
broader: Abiotic parameter

Cribrum
type: Concept
definition: A perforated siliceous plate covering an areola in the valve of some diatoms. The cribrum has many tiny pores and functions as a sieve-like structure.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: Costae in 10 µm

Chromatophors
type: Concept
definition: Pigment-containing structures that give cells their color and may aid in photosynthesis.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton

Order
type: Concept
definition: The full scientific name of the order in which the taxon is classified.
in scheme: phyto vre thesaurus
alternative label: order
broader: Taxon

Apical plate 3'
type: Concept
definition: Apical plate 3′ is the third plate of the apical series in the epitheca of thecate dinoflagellates.
in scheme: phyto vre thesaurus
broader: Apical plates
source: https://www.dinophyta.org/morphology-of-dinoflagellates/kofoid-tabulation/
source: Kofoid, C. A. (1909). On the classification of dinoflagellates. Zoologischer Anzeiger, 34, 192–203.

Apical plates
type: Concept
definition: Apical plates are a set of thecal plates located in the epitheca, near the apex of the cell, in thecate dinoflagellates. They form part of the apical series in the Kofoidian plate tabulation system and are conventionally indicated by prime symbols (′). The number, shape, and arrangement of apical plates are key diagnostic characters in dinoflagellate taxonomy.
in scheme: phyto vre thesaurus
broader: Thecal plates
related: Apical Pore
related: Apical Axis
source: http://taxonomic.aad.gov.au/360.html
source: https://www.dinophyta.org/morphology-of-dinoflagellates/kofoid-tabulation/

Apical Pore
type: Concept
definition: A pore or pore-bearing plate at the apex of some dinoflagellates, often used as a diagnostic feature in tabulation.
in scheme: phyto vre thesaurus
alternative label: (Po)
broader: Atlas of Phytoplankton
source: https://www.dinophyta.org/morphology-of-dinoflagellates/kofoid-tabulation/
source: Kofoid, C. A. (1909). On the classification of dinoflagellates. Zoologischer Anzeiger, 34, 192–203.
modified: 2026-01-21T12:27:32

Apical Axis
type: Concept
definition: The apical axis is the longitudinal morphological axis of a phytoplankton cell that extends from the apex (anterior end) to the antapex (posterior end).
in scheme: phyto vre thesaurus
alternative label: apical axis
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9
source: http://taxonomic.aad.gov.au/360.html

Pielou's Evenness
type: Concept
definition: An evenness index that measures how evenly individuals are distributed among species in a community.
in scheme: phyto vre thesaurus
alternative label: J'
broader: Diversity Indices
source: https://doi.org/10.1016/0022-5193(66)90013-0

Country
type: Concept
definition: The name of the country or major administrative unit in which the location occurs.
in scheme: phyto vre thesaurus
alternative label: country
broader: Location

Day
type: Concept
definition: The integer day of the month on which the event occurred.
in scheme: phyto vre thesaurus
alternative label: day
broader: Event

Foramen
type: Concept
definition: The main external opening of a diatom areola, typically visible on the valve surface. In some taxa, the foramen is covered internally by a cribrum or other sieve-like structure.
in scheme: phyto vre thesaurus
alternative label: Foramina
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Annulus
type: Concept
definition: A hyaline ring-shaped structure or zone on the surface of some phytoplankton cells, often surrounding a central pore or area.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Nitrate
type: Concept
definition: Concentration of nitrate nitrogen per unit volume of the water column.
in scheme: phyto vre thesaurus
alternative label: NO₃⁻
broader: Abiotic parameter

Dissolved Inorganic Phosphorus
type: Concept
definition: Inorganic phosphorus available for biological uptake (usually orthophosphate).
in scheme: phyto vre thesaurus
alternative label: DIP
alternative label: Orthophosphate
alternative label: PO₄³⁻
broader: Abiotic parameter

Hurlbert’s Index
type: Concept
definition: Hurlbert’s PIE (Probability of Interspecific Encounter) measures the probability that two randomly selected individuals from a community belong to different species.
in scheme: phyto vre thesaurus
alternative label: Hurlbert’s PIE (Probability of Interspecific Encounter)
broader: Diversity Indices
source: https://doi.org/10.2307/1934145

Coccoliths-cyrtolith
type: Concept
definition: Convex disc shaped coccoliths, may with a projecting central process.
in scheme: phyto vre thesaurus
alternative label: Cyrtolith
broader: Coccoliths
source: https://doi.org/10.58998/jnr2297

Margalef Index
type: Concept
definition: A species richness index that relates the number of species to the logarithm of total abundance.
in scheme: phyto vre thesaurus
broader: Diversity Indices
source: https://digital.csic.es/bitstream/10261/284346/1/Margalef_1973.pdf

Coccoliths-cribrilith
type: Concept
definition: Disc-shaped coccoliths, with numerous perforations in the central area.
in scheme: phyto vre thesaurus
alternative label: Cribrilith
broader: Coccoliths
source: https://doi.org/10.58998/jnr2297

Apical plate 1'
type: Concept
definition: Apical plate 1′ is the first plate of the apical series located in the epitheca of a thecate dinoflagellate, positioned adjacent to the apical pore complex.
in scheme: phyto vre thesaurus
broader: Apical plates
source: https://www.dinophyta.org/morphology-of-dinoflagellates/kofoid-tabulation/
source: Kofoid, C. A. (1909). On the classification of dinoflagellates. Zoologischer Anzeiger, 34, 192–203.

Lead
type: Concept
definition: Concentration or amount of lead.
in scheme: phyto vre thesaurus
alternative label: Pb
broader: Abiotic parameter

Kingdom
type: Concept
definition: The full scientific name of the kingdom in which the taxon is classified.
in scheme: phyto vre thesaurus
alternative label: kingdom
broader: Taxon

Manganese
type: Concept
definition: Concentration or amount of manganese.
in scheme: phyto vre thesaurus
alternative label: Mn
broader: Abiotic parameter

Possibly toxic
type: Concept
definition: Refers to phytoplankton species that have been reported as potentially toxin-producing, but without consistent or conclusive confirmation across studies or strains.
in scheme: phyto vre thesaurus
broader: Toxicity

Coccolith-zygolith
type: Concept
definition: A type of coccolith (calcium carbonate plate) produced by coccolithophores, typically formed during the haploid phase of the life cycle. Zygoliths differ in shape and structure from coccoliths of the diploid phase and are important for identifying life-cycle stages in coccolithophores.
in scheme: phyto vre thesaurus
alternative label: Zygolith
broader: Coccoliths
source: https://doi.org/10.58998/jnr2297

Simpson Equivalents
type: Concept
definition: The effective number of species derived from Simpson’s index, representing the number of equally abundant species needed to produce the observed Simpson diversity.
in scheme: phyto vre thesaurus
broader: Diversity Indices
source: https://doi.org/10.2307/1934352

Hypocone
type: Concept
definition: The posterior (lower) portion of a dinoflagellate cell below the cingulum.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
related: Cingulum
source: https://doi.org/10.1038/npg.els.0001977

Nitrite
type: Concept
definition: Concentration of nitrite nitrogen per unit volume of the water column.
in scheme: phyto vre thesaurus
alternative label: NO₂⁻
broader: Abiotic parameter

Oligotrophic
type: Concept
definition: Refers to waters that are nutrient-poor, with low concentrations of nitrogen and phosphorus, high oxygen content, low biological productivity, and usually high transparency.
in scheme: phyto vre thesaurus
broader: Water trophic status
source: https://doi.org/10.4319/lo.1977.22.2.0361

Decimal Latitude
type: Concept
definition: The geographic latitude (in decimal degrees, using the spatial reference system) of the geographic center of a location. Positive values are north of the Equator, negative values are south of it. Legal values lie between -90 and 90, inclusive.
in scheme: phyto vre thesaurus
alternative label: dec LAT
alternative label: decimalLatitude
broader: Location

Pseudoraphe
type: Concept
definition: A central, unornamented zone on the valve that resembles a raphe but lacks a true slit and is non-functional for motility.
in scheme: phyto vre thesaurus
alternative label: pseudo-raphe
broader: Raphe
source: http://taxonomic.aad.gov.au/360.html

Electron Transport Rate
type: Concept
definition: Electron Transport Rate (ETR) is a photosynthetic parameter that quantifies the rate at which electrons are transferred through the photosynthetic electron transport chain, primarily associated with Photosystem II (PSII) during the light reactions of photosynthesis. ETR is commonly used as an indicator of photosynthetic activity and efficiency.
in scheme: phyto vre thesaurus
alternative label: ETR
broader: Abiotic parameter
source: https://doi.org/10.1016/S0304-4165(89)80016-9

Chloroplasts
type: Concept
definition: Organelles containing pigments (like chlorophyll) where photosynthesis takes place.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton

Scientific Name
type: Concept
definition: The full scientific name, with authorship and date information if known. When forming part of a identification, this should be the name in lowest level taxonomic rank that can be determined.
in scheme: phyto vre thesaurus
alternative label: scientificName
broader: Taxon

Cilia
type: Concept
definition: Short, hair-like projections covering the cell surface, used for movement or creating currents.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton

Sulfate
type: Concept
definition: Concentration or amount of sulfate ions.
in scheme: phyto vre thesaurus
alternative label: SO₄²⁻
broader: Abiotic parameter

Infraspecific Epithet
type: Concept
definition: The name of the lowest or terminal infraspecific epithet of the scientificName, excluding any rank designation.
in scheme: phyto vre thesaurus
alternative label: infraspecificEpithet
broader: Taxon

Harmful
type: Concept
definition: Refers to phytoplankton species or blooms that negatively affect ecosystems, human health, or water quality (e.g., harmful algal blooms).
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton

Primary Production Nanoplankton
type: Concept
definition: Primary production for nanoplankton.
in scheme: phyto vre thesaurus
alternative label: PP nano
broader: Net Primary Production

Dissimilarity Index
type: Concept
definition: A measure of compositional dissimilarity between communities or samples, based on species abundances or presence–absence data.
example: Bray-Curtis, Jaccard, Euclidean
in scheme: phyto vre thesaurus
broader: Diversity Indices

Pseudonodule
type: Concept
definition: A thickened area or silica deposit on the valve resembling a nodule, but not a true structural nodule.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Phytoplankton
type: Concept
definition: Microscopic photosynthetic organisms (mainly unicellular algae and cyanobacteria) that live suspended in aquatic environments. They form the base of the aquatic food web and produce a significant share of Earth’s oxygen through photosynthesis.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton

Maximum Quantum Yield of PSII
type: Concept
definition: Efficiency of photosystem II photochemistry in dark-adapted state.
in scheme: phyto vre thesaurus
alternative label: Fv/Fm
broader: Abiotic parameter

Phylum
type: Concept
definition: The full scientific name of the phylum or division in which the taxon is classified.
in scheme: phyto vre thesaurus
alternative label: phylum
broader: Taxon

Gross Primary Production
type: Concept
definition: Total carbon fixed by photosynthesis in an ecosystem.
in scheme: phyto vre thesaurus
alternative label: GPP
broader: Biotic parameter

Calyptroliths
type: Concept
definition: Basket-shaped coccoliths with openings near the base.
in scheme: phyto vre thesaurus
alternative label: Calyptrolith
broader: Coccoliths
source: https://doi.org/10.58998/jnr2297

Shannon Equivalents
type: Concept
definition: The effective number of species derived from the Shannon index, representing the number of equally abundant species needed to produce the observed Shannon diversity.
in scheme: phyto vre thesaurus
broader: Diversity Indices
source: https://doi.org/10.2307/1934352

Mucilage
type: Concept
definition: A gelatinous, sticky substance secreted by cells, often forming protective layers or colonies.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton

Number of Random Fields
type: Concept
definition: The number of random fields refers to the count of microscope fields of view selected at random within the sedimentation chamber and examined during microscopic analysis.
in scheme: phyto vre thesaurus
alternative label: N field
alternative label: n_fields
broader: Density per Random Fields
source: https://doi.org/10.1007/BF00007865
source: https://doi.org/10.1080/05384680.1958.11904091

Density per Random Fields
type: Concept
definition: Density by random field counting is a quantitative microscopy method in which organism density is estimated by counting individuals in a fixed number of randomly selected microscope fields of view within the sedimentation chamber.
in scheme: phyto vre thesaurus
broader: Utermöhl Counting Method
source: https://doi.org/10.1007/BF00007865
source: https://doi.org/10.1080/05384680.1958.11904091

Water Temperature
type: Concept
definition: Water temperature measured in situ.
in scheme: phyto vre thesaurus
alternative label: Tw
broader: Temperature

Temperature
type: Concept
version info: 1
deprecated: false
definition: The degree of hotness of an object, a measurement matrix, an environment, expressed against a standard scale.
definition: Degré de chaleur d'un objet, d'une matrice, d'un environnement, exprimé selon une échelle standard. @fr
in scheme: phyto vre thesaurus
preferred label: température @fr
notation: SDN:S06::S0600082
note: accepted
broader: Abiotic parameter
broader: S014
narrower: ALKTMP01
narrower: ATEMPEQ0
narrower: BEDXTEMP
narrower: CATAVT10
narrower: CATAVTO2
narrower: CBTASS01
narrower: CDTAPS01
narrower: CDTASDP1
narrower: CDTASS01
narrower: CDTASS02
narrower: CDTASS03
narrower: CDTASSD1
narrower: CDTASSMS
narrower: CDTAZZ01
narrower: CDTAZZ02
narrower: CTLGPR01
narrower: CTMP1001
narrower: CTMPDMNA
narrower: CTMPDMNB
narrower: CTMPDMXA
narrower: CTMPDMXB
narrower: CTMPMN01
narrower: CTMPMX01
narrower: CTMPSD01
narrower: CTMPZZ01
narrower: CTMPZZ02
narrower: CTMPZZ03
narrower: CTMPZZ04
narrower: DENTMP01
narrower: DOCTMP01
narrower: FETOTTMP
narrower: GASTMP01
narrower: ITEMP0EQ
narrower: ITEMP0HT
narrower: ITEMP0MA
narrower: ITEMP0S0
narrower: ITEMP0S2
narrower: ITEMP0S4
narrower: ITEMPBOT
narrower: ITEMPMID
narrower: ITEMPTOP
narrower: LTEMP0EQ
narrower: LTEMP0MA
narrower: LTEMP0S0
narrower: LTEMP0S2
narrower: LTEMP0S4
narrower: LTEMPEQ0
narrower: MN2TMP01
narrower: NUTTMP01
narrower: OTEMP0EQ
narrower: OTEMP0MA
narrower: OTEMP0S0
narrower: OTEMP0S2
narrower: OTEMP0S4
narrower: OXYTAAOP
narrower: OXYTEX01
narrower: OXYTMP01
narrower: OXYTMPSD
narrower: OXYTPR01
narrower: PCOTXXXX
narrower: PHTXPP01
narrower: PHTXPR01
narrower: PHTXSD01
narrower: PSSTBK01
narrower: PSSTRT01
narrower: PSSTRT02
narrower: PSSTTS01
narrower: PSSTZZ01

Chloride
type: Concept
definition: Concentration or amount of chloride ions
in scheme: phyto vre thesaurus
alternative label: Cl⁻
broader: Abiotic parameter

McIntosh Index
type: Concept
definition: A diversity index based on the distance of a community from a hypothetical community in which all species are equally abundant.
in scheme: phyto vre thesaurus
broader: Diversity Indices
source: https://doi.org/10.2307/1932674

Antapex
type: Concept
definition: The posterior end of a phytoplankton cell, opposite the apical region.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1017/S0025315400050359

Principal Component Analysis
type: Concept
definition: PCA is an unsupervised ordination method that reduces dimensionality by summarizing variance in species data into a reduced set of orthogonal components. PCA achieves this by transforming a set of possibly correlated variables into a smaller number of uncorrelated variables, known as principal components, which are linear combinations of the original variables and are ordered according to the amount of variance they explain.
in scheme: phyto vre thesaurus
alternative label: PCA
broader: Data analysis
source: https://doi.org/10.1007/b98835
source: https://doi.org/10.1037/h0071325

Girdle band
type: Concept
definition: A girdle band is an individual silica band forming part of the girdle of a diatom frustule.
in scheme: phyto vre thesaurus
broader: Girdle
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Girdle
type: Concept
definition: The part of the frustule located between the epivalve and the hypovalve, consisting of the epicingulum and hypocingulum
in scheme: phyto vre thesaurus
alternative label: Cinture
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Girdle view
type: Concept
definition: Orientation of a cell when observed from the side of the girdle (cingulum).
in scheme: phyto vre thesaurus
broader: Valve view
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Iron
type: Concept
definition: Concentration or amount of iron.
in scheme: phyto vre thesaurus
alternative label: Fe
broader: Abiotic parameter

Cingular crest
type: Concept
definition: A raised ridge or fold along the cingulum, sometimes bearing lists, characteristic of some dinoflagellate genera.
in scheme: phyto vre thesaurus
broader: Cingulum
source: https://doi.org/10.1038/npg.els.0001977

Terminal setae
type: Concept
definition: Setae (bristle-like siliceous projections) that arise from the terminal ends of a diatom cell or valve. They may aid in buoyancy, defense, or colony formation and are diagnostic in some genera.
in scheme: phyto vre thesaurus
broader: Setae

Sulcus
type: Concept
definition: A longitudinal groove on the surface of dinoflagellates, where the longitudinal flagellum is inserted.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1038/npg.els.0001977

Total Chlorophyll
type: Concept
in scheme: phyto vre thesaurus
alternative label: Chl tot
broader: Chlorophyll a content

Coccolith-rhabdolith
type: Concept
definition: A single plate with a club-shaped central process.
in scheme: phyto vre thesaurus
alternative label: Rhabdolith
broader: Coccoliths
source: https://doi.org/10.58998/jnr2297

Replicate
type: Concept
definition: A replicate is an independent repetition of a measurement, observation, or experimental unit performed under the same conditions to assess variability, improve precision, and ensure reliability of results.
in scheme: phyto vre thesaurus
broader: Event

Taxonomic Richness
type: Concept
definition: Number of species present in a community or sample.
in scheme: phyto vre thesaurus
alternative label: S
broader: Diversity Indices
source: https://www2.ib.unicamp.br/profs/thomas/NE002_2011/maio10/Magurran%202004%20c2-4.pdf

Factor
type: Concept
definition: The dilution (or concentration) factor is a dimensionless coefficient that quantifies the change in concentration of a sample resulting from dilution or concentration procedures. It is defined as the ratio between the final volume and the original sample volume and is used to convert measured concentrations to original (or concentrated) values.
in scheme: phyto vre thesaurus
broader: Utermöhl Counting Method
source: https://doi.org/10.1080/05384680.1958.11904091

Redundancy Analysis
type: Concept
definition: Redundancy Analysis (RDA) is a constrained ordination technique and an extension of Principal Component Analysis (PCA) that relates multivariate response data to explanatory variables through linear constraints.
in scheme: phyto vre thesaurus
alternative label: RDA
broader: Data analysis
source: https://doi.org/10.1016/B978-0-12-409548-9.10595-0

Gleason Index
type: Concept
definition: A species richness index that accounts for the number of species relative to the logarithm of total abundance. The Gleason Index is defined as (S − 1) / ln(N), where S is species richness and N is total abundance.
in scheme: phyto vre thesaurus
broader: Diversity Indices
source: https://doi.org/10.2307/1929150

Gullet
type: Concept
definition: A tubular or funnel-like invagination of the cell membrane used to ingest food particles.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton

Chlorophyll Nanoplankton
type: Concept
definition: Size-fractionated phytoplankton biomass for nanoplankton.
in scheme: phyto vre thesaurus
alternative label: Chl nano
broader: Chlorophyll a content

Hypertrophic
type: Concept
definition: Refers to waters that are extremely nutrient-enriched, with excessive algal blooms, very poor water clarity, frequent oxygen depletion (anoxia), and degraded ecological conditions.
in scheme: phyto vre thesaurus
alternative label: Hypereutrophic
broader: Water trophic status
source: https://doi.org/10.4319/lo.1977.22.2.0361

Apical plate 2'
type: Concept
definition: Apical plate 2′ is the second plate of the apical series in the epitheca of thecate dinoflagellates.
in scheme: phyto vre thesaurus
broader: Apical plates
source: https://www.dinophyta.org/morphology-of-dinoflagellates/kofoid-tabulation/
source: Kofoid, C. A. (1909). On the classification of dinoflagellates. Zoologischer Anzeiger, 34, 192–203.

Decimal Longitude
type: Concept
definition: The geographic longitude (in decimal degrees, using the spatial reference system) of the geographic center of a location. Positive values are east of the Greenwich Meridian, negative values are west of it. Legal values lie between -180 and 180, inclusive.
in scheme: phyto vre thesaurus
alternative label: dec LONG
alternative label: decimalLongitude
broader: Location

Canonical Correspondence Analysis
type: Concept
definition: Ordination method that relates community composition directly to environmental variables.
in scheme: phyto vre thesaurus
alternative label: CCA
broader: Data analysis
source: https://doi.org/10.2307/1938672

Beta Diversity
type: Concept
definition: A measure of species turnover or variation in species composition among sites or samples.
in scheme: phyto vre thesaurus
alternative label: β diversity
alternative label: β-diversity
broader: Diversity Indices
source: https://doi.org/10.2307/1943563

Coccoliths-scapholith
type: Concept
definition: A type of coccolith produced by coccolithophores, distinguished by its elongated, boat- or canoe-shaped morphology.
in scheme: phyto vre thesaurus
alternative label: Scapholith
broader: Coccoliths
source: https://doi.org/10.58998/jnr2297

Apical plate 4'
type: Concept
definition: Apical plate 4′ is the fourth plate of the apical series located in the epitheca of thecate dinoflagellates.
in scheme: phyto vre thesaurus
broader: Apical plates
source: https://www.dinophyta.org/morphology-of-dinoflagellates/kofoid-tabulation/
source: Kofoid, C. A. (1909). On the classification of dinoflagellates. Zoologischer Anzeiger, 34, 192–203.

Coccolith-placolith
type: Concept
definition: Placoliths are a type of coccolith, characterized by a flat, disk-like structure composed of two shields (a distal shield and a proximal shield) connected by a central tube or collar.
in scheme: phyto vre thesaurus
alternative label: Placolith
broader: Coccoliths
source: https://doi.org/10.58998/jnr2297

Tabulation
type: Concept
definition: The arrangement and pattern of thecal plates forming the outer covering of dinoflagellates, used for classification.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: Kofoid, C. A. (1909). On the classification of dinoflagellates. Zoologischer Anzeiger, 34, 192–203.
source: https://doi.org/10.1038/npg.els.0001977

Treatment
type: Concept
definition: A treatment is a defined experimental condition applied to test its effect on a response variable.
in scheme: phyto vre thesaurus
broader: Event

Settling Volume
type: Concept
definition: The settling volume is the volume of sample introduced into the sedimentation chamber and allowed to settle before microscopic examination.
in scheme: phyto vre thesaurus
alternative label: volume of sedimentation chamber
broader: Utermöhl Counting Method
source: https://doi.org/10.1007/BF00007865
source: https://doi.org/10.1080/05384680.1958.11904091

Fultopurtula
type: Concept
definition: A tubular process on the valve of centric diatoms, typically surrounded by satellite pores. Fultoportulae function in secretion and buoyancy regulation and are diagnostic morphological features in many diatom groups.
in scheme: phyto vre thesaurus
alternative label: Fultopurtulae
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9
source: https://doi.org/10.1093/sysbio/41.1.125

Subfamily
type: Concept
definition: The full scientific name of the subfamily in which the taxon is classified.
in scheme: phyto vre thesaurus
alternative label: subfamily
broader: Taxon

Poroids
type: Concept
definition: Small pore-like structures on the surface of some algal cell walls, typically arranged in patterns.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Upper valvae
type: Concept
definition: The upper half of a diatom frustule, usually the larger valve, which overlaps the lower valve (hypovalve).
in scheme: phyto vre thesaurus
alternative label: Epivalve
broader: Valve
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Velum
type: Concept
definition: A thin perforated layer of silica across an areola.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
related: Areola
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Areola
type: Concept
definition: Regularly repeated perforation through the valve wall, often marked by more or less elaborate multiangular walls or ribs.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Apical horn
type: Concept
definition: A projection or extension from the apical end of some dinoflagellate cells.
in scheme: phyto vre thesaurus
broader: Apical plates
source: https://doi.org/10.1017/S0025315400050359

Seasonal AutoRegressive Integrated Moving Average with eXogenous regressors
type: Concept
definition: SARIMAX (Seasonal AutoRegressive Integrated Moving Average with eXogenous regressors) is a seasonal extension of ARIMA that incorporates external regressors to model and forecast time series influenced by both internal dynamics and exogenous factors.
in scheme: phyto vre thesaurus
alternative label: SARIMAX
broader: Data analysis
source: https://doi.org/10.1111/jtsa.12194
source: https://otexts.com/fpp3/

Parent Event ID
type: Concept
definition: An identifier for the broader dwc:Event that groups this and potentially other events.
in scheme: phyto vre thesaurus
alternative label: parentEventID
broader: Event

Tychoplanktic
type: Concept
definition: Refers to organisms that normally live attached to surfaces or in benthic habitats, but which can occur temporarily in the plankton when detached and carried by water movements.
in scheme: phyto vre thesaurus
broader: Distribution

Traits Computation (simplified)
type: Concept
definition: A simplified computation method within the Trait Computation web service that uses shape approximations (e.g., length × width) to estimate size-related traits such as biovolume and surface area; faster and widely used.
in scheme: phyto vre thesaurus
broader: Traits Computation

Traits Computation
type: Concept
definition: A web service for the calculation of phytoplankton traits, such as biovolume, surface area, surface-to-volume ratio, density, cell carbon content, total biovolume, and total carbon content.
in scheme: phyto vre thesaurus
broader: e-Service
related: Data analysis

Country Code
type: Concept
definition: The standard code for the country in which the location occurs.
in scheme: phyto vre thesaurus
alternative label: countryCode
broader: Location

Event ID
type: Concept
definition: An identifier for the set of information associated with a event (something that occurs at a place and time). May be a global unique identifier or an identifier specific to the data set.
in scheme: phyto vre thesaurus
alternative label: eventID
broader: Event

Mantle height
type: Concept
definition: The linear distance from the edge of the valve face to the base of the mantle, usually expressed in micrometers (µm).
in scheme: phyto vre thesaurus
broader: Mantle

Mantle
type: Concept
definition: The side wall of a diatom valve, connecting the valve face to the girdle (cingulum). The mantle often bears striae or areolae and is important in species identification.
in scheme: phyto vre thesaurus
alternative label: mantle (phytoplankton)
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Dorsal view
type: Concept
definition: Orientation of a phytoplankton cell observed from the side opposite to a main groove or sulcus (general orientation term).
in scheme: phyto vre thesaurus
broader: Valve view

Mercury
type: Concept
definition: Concentration or amount of mercury.
in scheme: phyto vre thesaurus
alternative label: Hg
broader: Abiotic parameter

McNaughton Dominance
type: Concept
definition: A dominance index that measures the proportional contribution of the most abundant species to the total community abundance.
in scheme: phyto vre thesaurus
broader: Diversity Indices
source: https://doi.org/10.1038/216168b0

Scientific Name Authorship
type: Concept
definition: The authorship information for the scientificName formatted according to the conventions of the applicable nomenclaturalCode.
in scheme: phyto vre thesaurus
alternative label: scientifcNameAuthorship
broader: Taxon

Simpson Index
type: Concept
definition: A diversity index that measures the probability that two randomly selected individuals belong to the same species.
in scheme: phyto vre thesaurus
broader: Diversity Indices
source: https://doi.org/10.1038/163688a0

Lateral view
type: Concept
definition: Orientation of a phytoplankton cell seen from the side, without emphasis on grooves or transverse bands.
in scheme: phyto vre thesaurus
broader: Valve view

Sheldon Evenness
type: Concept
definition: An evenness index derived from the Shannon index that measures how evenly individuals are distributed among species in a community.
in scheme: phyto vre thesaurus
broader: Diversity Indices
source: https://doi.org/10.2307/1933900

Menhinick Index
type: Concept
definition: A species richness index that relates the number of species to the square root of total abundance.
in scheme: phyto vre thesaurus
broader: Diversity Indices
source: https://doi.org/10.2307/1934933

Taxon Remarks
type: Concept
definition: Comments or notes about the taxon or name.
in scheme: phyto vre thesaurus
alternative label: taxonRemarks
broader: Taxon

Traits Computation (advanced)
type: Concept
definition: An advanced computation method for the Trait Computation web service that uses species-specific geometric models and multiple measured dimensions (e.g., a, b, h) to compute biovolume and/or surface area.
in scheme: phyto vre thesaurus
broader: Traits Computation

Aerotopes
type: Concept
definition: Gas-filled intracellular structures (also referred to as gas vesicles) found in certain aquatic microorganisms, particularly cyanobacteria. They provide buoyancy regulation, allowing cells to adjust their vertical position in the water column.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://www.landcareresearch.co.nz/tools-and-resources/identification/freshwater-algae/identifications-guide/glossary
source: https://www.montclair.edu/water-science/freshwater-cyanobacteria-of-new-jersey/glossary/

Community Matrix
type: Concept
definition: A web service to create a community matrix (usually rows = samples, columns = taxa/species) , from the input data file for each taxonomic, spatial and temporal level selected, based on the trait density, carbon content, biovolume.
in scheme: phyto vre thesaurus
broader: e-Service
related: Data analysis

Chlorophyll Picoplankton
type: Concept
definition: Size-fractionated phytoplankton biomass for picoplankton.
in scheme: phyto vre thesaurus
alternative label: Chl pico
broader: Chlorophyll a content

Subgenus
type: Concept
definition: The full scientific name of the subgenus in which the taxon is classified.
in scheme: phyto vre thesaurus
alternative label: subgenus
broader: Taxon

Size Density Relationship
type: Concept
definition: A web service to calculate size - abundance relationships at local, regional or global scale.
in scheme: phyto vre thesaurus
broader: e-Service
source: https://doi.org/10.1016/j.tree.2007.03.007

Cingular plates
type: Concept
definition: Cingular plates are the thecal plates forming the cingulum, the equatorial groove that encircles the cell and separates the epitheca from the hypotheca.
in scheme: phyto vre thesaurus
broader: Thecal plates
source: https://www.dinophyta.org/morphology-of-dinoflagellates/kofoid-tabulation/
source: Kofoid, C. A. (1909). On the classification of dinoflagellates. Zoologischer Anzeiger, 34, 192–203.
modified: 2026-01-21T12:56:33

Cruise
type: Concept
definition: Identifier assigned to a specific sampling event by a cruise.
in scheme: phyto vre thesaurus
broader: Event

Epicone
type: Concept
definition: The anterior (upper) portion of a dinoflagellate cell above the cingulum.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
related: Cingulum
source: https://www.dinophyta.org/morphology-of-dinoflagellates/kofoid-tabulation/
source: https://doi.org/10.1038/npg.els.0001977

Season
type: Concept
definition: A season is a recurring period within a year characterized by consistent environmental, climatic, or biological conditions, such as changes in temperature, precipitation, or photoperiod.
in scheme: phyto vre thesaurus
broader: Event

Cingular bands
type: Concept
definition: Plate-like bands that make up the cingulum in dinoflagellates, forming its structural elements.
in scheme: phyto vre thesaurus
broader: Cingulum
source: https://doi.org/10.1038/npg.els.0001977

Precingular plates
type: Concept
definition: Precingular plates are the thecal plates located immediately below the apical plates and above the cingulum.
in scheme: phyto vre thesaurus
broader: Thecal plates
source: https://www.dinophyta.org/morphology-of-dinoflagellates/kofoid-tabulation/
source: Kofoid, C. A. (1909). On the classification of dinoflagellates. Zoologischer Anzeiger, 34, 192–203.
modified: 2026-01-21T12:57:06

Metaphytic
type: Concept
definition: Refers to algae that grow attached to substrates (such as rocks, sediments, or plants) but are not firmly fixed, forming loose mats or layers that can detach and float in the water
in scheme: phyto vre thesaurus
broader: Distribution

Hypotheca
type: Concept
definition: The lower or posterior half of a phytoplankton cell covering, typically the smaller portion that fits into the epitheca. Lower part of frustule.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
related: Frustule
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Para shape
type: Concept
definition: In dinoflagellate morphology, para , meta and ortho are terms used to describe the cell shape based on the relative displacement of the epitheca and hypotheca along the longitudinal axis. In PARA shape, epitheca and hypotheca are aligned, giving the cell a symmetrical appearance.
in scheme: phyto vre thesaurus
broader: Shape

Measurement Remarks
type: Concept
definition: Comments or notes accompanying the MeasurementOrFact.
in scheme: phyto vre thesaurus
alternative label: measurementRemarks
broader: Data Template

Area of Sedimentation Chamber
type: Concept
definition: The area of the sedimentation chamber is the bottom surface area of the counting chamber over which particles or organisms settle during sedimentation prior to microscopic examination.
in scheme: phyto vre thesaurus
broader: Diameter of Sedimentation Chamber
source: https://doi.org/10.1080/05384680.1958.11904091

Diameter of Sedimentation Chamber
type: Concept
definition: The straight-line distance across the circular sedimentation counting chamber. Used to calculate the chamber’s total area when circular (Area = π × radius²).
in scheme: phyto vre thesaurus
broader: Utermöhl Counting Method
source: https://doi.org/10.1080/05384680.1958.11904091

Respiration
type: Concept
definition: All of the processes used by organisms to generate metabolically usable energy, chieﬂy in the form of ATP, from the oxidative breakdown of foodstuffs. May refer to processes ranging from the exchange of oxygen and carbon dioxide between organism and environ­ment, to the biochemical processes gen­erating ATP at the cellular level. a. respiratory, pert. or involved in re­spiration. see also aerobic respiration, anaerobic respiration, glycolysis, oxidative phosphorylation.
in scheme: phyto vre thesaurus
alternative label: R
broader: Abiotic parameter

Previsional Model
type: Concept
definition: Statistical or computational model designed to estimate or predict the value of a response variable for new or future observations based on the relationship between one or more predictor (independent) variables and the outcome.
in scheme: phyto vre thesaurus
broader: Data analysis
source: https://doi.org/10.1007/978-1-0716-1418-1
source: https://doi.org/10.1007/978-0-387-84858-7
modified: 2026-01-21T12:43:44

Accepted Name Usage
type: Concept
definition: The full name, with authorship and date information if known, of the currently valid (zoological) or accepted (botanical) taxon.
in scheme: phyto vre thesaurus
alternative label: acceptedNameUsage
broader: Taxon

unit of measure
type: Property
range: Literal
domain: Concept

Epilithic
type: NamedIndividual
type: Concept
definition: An organism growing on the surface of rocks or other hard inorganic or organic substrata.
in scheme: phyto vre thesaurus
broader: Distribution
broader: c f9a0ae63
mapping loom: epilithic
created: 2024-06-24T10:16:57
source: MarLIN, 2006. BIOTIC - Biological Traits Information Catalogue. www.marlin.ac.uk/biotic
source: Lincoln, R.J., Boxshall, G.A., Clark, P.F., 1998. Dictionary of ecology, evolution and systematics. 2nd ed. Cambridge: Cambridge University Press.
modified: 2026-01-21T14:25:34

Non toxic
type: NamedIndividual
type: Concept
definition: Organism not known to produce or accumulate harmful biochemical compounds.
in scheme: phyto vre thesaurus
broader: Toxicity
mapping loom: nontoxic
created: 2025-12-08T13:40:29
modified: 2026-01-21T14:32:20

Athecate
type: NamedIndividual
type: Concept
definition: An organism lacking cellulose thecal plates.
example: Amphidinium, Gymnodinium, Gyrodinium, Karlodinium, Karenia.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
broader: c b0ba7aeb
mapping loom: athecate
created: 2025-09-28T17:16:58
modified: 2026-01-21T14:28:28

Areolae (bands) in 10µm
type: NamedIndividual
type: Concept
definition: The number of areolae counted within a 10 µm section along a diatom girdle band (part of the cingulum).
in scheme: phyto vre thesaurus
broader: Areolae in 10µm
broader: c 2f98e6f0
mapping loom: areolaebandsin10m
created: 2025-10-20T13:56:19
modified: 2026-01-21T14:28:14

Areolae in 10µm
type: NamedIndividual
type: Concept
definition: The number of areolae counted within a 10 µm section of the valve face.
in scheme: phyto vre thesaurus
broader: Areola
broader: c 2f98e6f0
mapping loom: areolaein10m
created: 2025-10-20T13:57:18
modified: 2026-01-21T14:28:07

Costae in 10 µm
type: NamedIndividual
type: Concept
definition: The number of costae counted along a 10 µm section of the frustule, used as a diagnostic morphometric character in diatom taxonomy.
in scheme: phyto vre thesaurus
broader: Costae
broader: c 6bd430e6
mapping loom: costaein10m
created: 2025-10-20T13:46:44
modified: 2026-01-21T14:30:54

Costae
type: Concept
definition: Thickened, rib-like silica structures on the frustule of certain diatoms, usually alternating with striae, providing support and rigidity.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Photosynthetically Active Radiation
type: NamedIndividual
type: Concept
definition: The spectral range of solar radiation from 400 to 700 nanometers that organisms are able to use for photosynthesis.
in scheme: phyto vre thesaurus
alternative label: PAR
broader: Abiotic parameter
broader: c 66f5f877
mapping loom: photosyntheticallyactiveradiation
created: 2024-11-11T10:37:48
modified: 2026-01-21T14:26:16

Epiphytic
type: NamedIndividual
type: Concept
definition: An organism growing on the surface of a living plant but not parasitic upon it.
in scheme: phyto vre thesaurus
alternative label: Epiphyte
alternative label: Epiphytes
broader: Distribution
broader: c f9a0ae63
mapping loom: epiphytic
created: 2024-06-24T10:17:05
source: MarLIN, 2006. BIOTIC - Biological Traits Information Catalogue. www.marlin.ac.uk/biotic
source: McLeod, C.R., 1996. Glossary of marine ecological terms, acronyms and abbreviations used in MNCR work. In: Marine Nature Conservation Review: Rationale and methods, (ed. K. Hiscock), pp 93-117. Peterborough: Joint Nature Conservation Committee.
modified: 2026-01-21T14:26:05

Lorica width
type: NamedIndividual
type: Concept
definition: The dimension of the lorica, measured perpendicular to its length, usually expressed in micrometers (µm).
in scheme: phyto vre thesaurus
alternative label: Width of lorica
broader: Lorica
broader: c d2d84e59
mapping loom: loricawidth
created: 2025-10-20T13:34:55
modified: 2026-01-21T14:31:59

Lorica
type: Concept
definition: A protective external covering or shell secreted by some unicellular organisms.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton

Cell width
type: NamedIndividual
type: Concept
definition: The shortest linear dimension of a cell, measured perpendicular to its length, from end to end along the shortest axis of the cell.
in scheme: phyto vre thesaurus
alternative label: Cellular width
broader: Linear dimensions
broader: c_73193705
mapping loom: cellwidth
created: 2023-10-04T17:30:23
modified: 2026-01-21T14:24:54

Auxospore diameter
type: NamedIndividual
type: Concept
definition: The linear distance across a auxospore measured through its center.
in scheme: phyto vre thesaurus
alternative label: Diameter of auxospore
broader: Auxospore
mapping loom: auxosporediameter
created: 2025-10-20T13:22:13
modified: 2026-01-21T14:28:33

Auxospore
type: Concept
definition: Specialized cell formed during the sexual reproduction of diatoms. Auxospores restore the maximum cell size of the lineage, which progressively decreases during successive vegetative divisions. The auxospore expands and develops into a new frustule, re-establishing the original size range of the species.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Toxic
type: NamedIndividual
type: Concept
definition: Organism able to produce or accumulate toxins that can negatively affect other organisms.
in scheme: phyto vre thesaurus
broader: Toxicity
mapping loom: toxic
created: 2025-12-08T13:39:37
modified: 2026-01-21T14:33:21

Akinete length
type: NamedIndividual
type: Concept
definition: The linear dimension of an akinete measured along its longest axis.
in scheme: phyto vre thesaurus
alternative label: Length of akinete
broader: Akinete
broader: c acdfbaa8
mapping loom: akinetelength
created: 2025-10-20T13:02:26
modified: 2026-01-21T14:27:53

Akinete
type: NamedIndividual
type: Concept
definition: A single-celled, thick-walled, non-motile spore derived from vegetative cell of filamentous, heterocyst-forming cyanobacteria (orders Nostocales and Stigonematales). Akinetes are typically larger than vegetative cells, withstand environmental extremes such as cold and desiccation, and germinate when conditions improve.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
broader: c 28fb2710
mapping loom: akinete
created: 2024-12-06T05:05:24
source: https://www.dcceew.gov.au/science-research/abrs/online-resources/glossaries/algae
modified: 2026-01-21T14:27:39

Cell length
type: NamedIndividual
type: Concept
definition: The total distance from point to point along the longest axis of a cell.
in scheme: phyto vre thesaurus
alternative label: Cellular length
broader: Linear dimensions
broader: c_73193705
mapping loom: celllength
created: 2023-10-04T17:29:46
modified: 2026-01-21T14:29:15

Mixotroph
type: NamedIndividual
type: Concept
definition: An organism that can obtain energy and nutrients through both autotrophic (self-feeding) and heterotrophic (consuming other organisms) methods.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
broader: c 6308d4df
mapping loom: mixotroph
created: 2025-03-24T15:12:34
modified: 2026-01-21T14:32:13

Phagotrophic feeding
type: NamedIndividual
type: Concept
definition: Feeding by engulfing a food cell or particle and ingesting it in a phagocytic vacuoles. Heterotrophic feeding mode in some dinoflagellates (e.i.Gyrodinium spirale).
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
broader: c 97b45c7c
mapping loom: phagotrophicfeeding
created: 2024-04-11T13:35:15
modified: 2026-01-21T14:32:28

Biraphid
type: NamedIndividual
type: Concept
definition: Diatoms in which both valves possess a raphe. These are typically motile diatoms, capable of gliding locomotion along surfaces.
in scheme: phyto vre thesaurus
broader: Raphe
broader: c 061d6ef7
mapping loom: biraphid
created: 2025-06-11T16:56:30
modified: 2026-01-21T14:29:09

Akinete width
type: NamedIndividual
type: Concept
definition: The linear dimension of an akinete measured perpendicular to its longest axis, usually expressed in micrometers (µm).
in scheme: phyto vre thesaurus
alternative label: Width of akinete
broader: Akinete
broader: c d2d84e59
mapping loom: akinetewidth
created: 2025-10-20T13:30:09
modified: 2026-01-21T14:28:01

Marginal areolae in 10 µm
type: NamedIndividual
type: Concept
definition: The number of areolae (pores) counted within a 10 µm section along the margin of a diatom valve.
in scheme: phyto vre thesaurus
broader: Areolae in 10µm
broader: c 2f98e6f0
mapping loom: marginalareolaein10m
created: 2025-10-20T13:50:41
modified: 2026-01-21T14:32:07

Fibulae in 10 µm
type: NamedIndividual
type: Concept
definition: The number of fibulae (silica cross-struts supporting the raphe canal) counted within a 10 µm section along the valve margin of a diatom. This morphometric feature is widely used as a diagnostic character in the taxonomy of genera such as Nitzschia and related taxa.
in scheme: phyto vre thesaurus
broader: Fibulae
broader: c cbeac09c
mapping loom: fibulaein10m
created: 2025-10-20T14:02:00
modified: 2026-01-21T14:30:59

Fibulae
type: Concept
definition: The series of thickened silica cross-struts that support the raphe canal in certain diatoms.
in scheme: phyto vre thesaurus
alternative label: fibula
broader: Atlas of Phytoplankton
source: https://doi.org/10.1016/B978-0-12-693018-4.X5000-9

Coccolith Diameter
type: NamedIndividual
type: Concept
definition: The linear distance measured across a coccolith (calcium carbonate plate of coccolithophores), usually expressed in micrometers (µm). It is a key morphometric character for identifying and classifying coccolithophore species.
in scheme: phyto vre thesaurus
broader: Coccoliths
broader: c c41a6073
mapping loom: coccolithdiameter
created: 2025-10-20T13:20:02
modified: 2026-01-21T14:29:45

Lorica length
type: NamedIndividual
type: Concept
definition: Linear dimension of the lorica measured along its longitudinal axis,usually expressed in micrometers (µm).
in scheme: phyto vre thesaurus
alternative label: Length of lorica
broader: Lorica
broader: c acdfbaa8
mapping loom: loricalength
created: 2025-10-20T13:16:23
modified: 2026-01-21T14:31:51

Lateral areolae in 10 µm
type: NamedIndividual
type: Concept
definition: The number of areolae counted within a 10 µm section along the lateral (side) areas of a diatom valve.
in scheme: phyto vre thesaurus
broader: Areolae in 10µm
broader: c 2f98e6f0
mapping loom: lateralareolaein10m
created: 2025-10-20T13:48:56
modified: 2026-01-21T14:31:38

Araphid
type: NamedIndividual
type: Concept
definition: Diatoms that entirely lack a raphe. These forms are generally non-motile.
in scheme: phyto vre thesaurus
broader: Raphe
broader: c 061d6ef7
mapping loom: araphid
created: 2025-06-11T16:56:36
modified: 2026-01-21T14:27:46

Heterocysts diameter
type: NamedIndividual
type: Concept
definition: The linear distance across a heterocyst measured through its center.
in scheme: phyto vre thesaurus
alternative label: Diameter of heterocysts
broader: Heterocyst
mapping loom: heterocystsdiameter
created: 2025-10-20T13:58:49
modified: 2026-01-21T14:31:31

Heterocyst
type: Concept
definition: A specialized, thick-walled cell formed by certain filamentous cyanobacteria, whose primary function is biological nitrogen fixation.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton

Bioluminescence
type: NamedIndividual
type: Concept
definition: The production and emission of light by a living organism. Bioluminescence is strongly related to intraspecific communication, such as mate finding,or predator–prey interactions.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
broader: c ec60ea56
mapping loom: bioluminescence
created: 2024-04-11T11:26:43
source: https://doi.org/10.1093/plankt/fbt019
modified: 2026-01-21T14:28:56

Coccolith Width
type: NamedIndividual
type: Concept
definition: The linear dimension of a coccolith measured perpendicular to its length (the shorter axis), usually expressed in micrometers (µm).
in scheme: phyto vre thesaurus
broader: Coccoliths
broader: c d2d84e59
mapping loom: coccolithwidth
created: 2025-10-20T13:29:18
modified: 2026-01-21T14:30:23

Coccolith height
type: NamedIndividual
type: Concept
definition: The thickness or vertical dimension of a coccolith (its three-dimensional relief), usually expressed in micrometers (µm).
in scheme: phyto vre thesaurus
broader: Cell thickness
mapping loom: coccolithheight
created: 2025-10-20T13:27:09
modified: 2026-01-21T14:30:16

Trichome width
type: Concept
definition: The cross-sectional diameter or thickness of a trichome, measured perpendicular to its longitudinal axis.
in scheme: phyto vre thesaurus
broader: Trichome
created: 2026-01-21T16:47:24
modified: 2026-01-21T16:47:47

Trichome
type: Concept
definition: Chain or filaments of connected cells forming part of a colonial or filamentous structure.
in scheme: phyto vre thesaurus
broader: Atlas of Phytoplankton
source: https://doi.org/10.1002/9781119068761

Epipelic
type: NamedIndividual
type: Concept
definition: An organism growing or living on mud (sediments, clays, and silt), residing at the interface of water and sediment.
in scheme: phyto vre thesaurus
broader: Distribution
broader: c f9a0ae63
mapping loom: epipelic
created: 2024-06-24T10:58:55
source: MarLIN, 2006. BIOTIC - Biological Traits Information Catalogue. www.marlin.ac.uk/biotic
source: Dodds, W.K. and Whiles, M.R. (2010) Concepts of Ecology: Concepts and Environmental Applications of Limnology. Second Edition. Elsevier Inc. 829 pp.
modified: 2026-01-21T14:25:47

Areolae (mantle) in 10µm
type: NamedIndividual
type: Concept
definition: The number of areolae counted within a 10 µm section along the mantle (side wall) of a diatom valve.
in scheme: phyto vre thesaurus
broader: Areolae in 10µm
broader: c 2f98e6f0
mapping relation: Mantle
mapping loom: areolaemantlein10m
created: 2025-10-20T13:56:48
modified: 2026-01-21T14:28:22

Heterotroph
type: NamedIndividual
type: Concept
definition: An organism that is unable of making organic molecules from inorganic sources of carbon and relies on the consumption of organic molecules synthesized by other organisms.
in scheme: phyto vre thesaurus
alternative label: Heterotrophic
alternative label: Heterotrophs
alternative label: heterotrophic organisms
broader: Atlas of Phytoplankton
broader: c 6308d4df
mapping loom: heterotroph
created: 2025-03-24T15:08:52
modified: 2026-01-21T14:31:10

Coccolith Length
type: NamedIndividual
type: Concept
definition: The linear dimension of a coccolith measured along its longest axis, expressed in micrometers (µm).
in scheme: phyto vre thesaurus
broader: Coccoliths
broader: c acdfbaa8
mapping loom: coccolithlength
created: 2025-10-20T13:21:05
modified: 2026-01-21T14:29:26

Unicellular
type: NamedIndividual
type: Concept
definition: An organism that consists of only one cell.
in scheme: phyto vre thesaurus
alternative label: Single-Cell Organism
alternative label: Single-cell
alternative label: Solitary
broader: Atlas of Phytoplankton
broader: c 2b4ea68b
mapping loom: unicellular
created: 2024-03-06T08:54:05
source: https://www.marinespecies.org/traits/aphia.php
modified: 2026-01-21T14:33:31

Intermediate areolae in 10µm
type: NamedIndividual
type: Concept
definition: The number of areolae counted in a 10 µm section located between the central and apical areas of a diatom valve.
in scheme: phyto vre thesaurus
broader: Areolae in 10µm
broader: c 2f98e6f0
mapping loom: intermediateareolaein10m
created: 2025-10-20T13:48:15
modified: 2026-01-21T14:31:15

Ludwig-Reynolds Evenness
type: Concept
definition: An evenness measure based on the relationship between observed diversity and maximum possible diversity.
in scheme: phyto vre thesaurus
broader: Diversity Indices
source: https://www2.ib.unicamp.br/profs/thomas/NE002_2011/maio12/LR%201988%20StatEcol%20sel1.pdf

Water body ammonium
type: Concept
version info: 4
deprecated: false
definition: Concentration of ammonium per unit volume of a river, estuary, sea or ocean by any method in filtered or unfiltered water.
in scheme: phyto vre thesaurus
alternative label: Ammonium
notation: SDN:P35::EPC00009
note: accepted
broader: Abiotic parameter
narrower: AMNKGC01
narrower: AMONAAD1
narrower: AMONAAD2
narrower: AMONAAD3
narrower: AMONAAD4
narrower: AMONAAD5
narrower: AMONAADZ
narrower: AMONAATX
narrower: AMONAAZX
narrower: AMONFID2
narrower: AMONFSG1
narrower: AMONHOTX
narrower: AMONKGD1
narrower: AMONMAD3
narrower: AMONMATX
narrower: AMONMP12
narrower: AMONMPD1
narrower: AMONNAKA
narrower: AMONNATX
narrower: AMONZZXX
narrower: MDMAP004
related: UPOX
date: 2025-07-28 13:35:18.0
authored on: 2025-07-28 13:35:18.0
has current version: http://vocab.nerc.ac.uk/collection/P35/current/EPC00009/4/
version: 4
in dataset: void
has version: http://vocab.nerc.ac.uk/collection/P35/current/EPC00009/1/
has version: http://vocab.nerc.ac.uk/collection/P35/current/EPC00009/2/
has version: http://vocab.nerc.ac.uk/collection/P35/current/EPC00009/3/

Wind speed
type: Concept
version info: 1
deprecated: false
definition: The speed of air relative to the ground or sea surface.
in scheme: phyto vre thesaurus
notation: SDN:P25::WINDS
note: accepted
broader: Abiotic parameter
narrower: WIND10SP
narrower: WINDSSAR
narrower: CFSN0038
narrower: CFSN0039
related: http://vocab.nerc.ac.uk/collection/L05/current/306/
related: AB
date: 2012-05-29 11:53:07.0
authored on: 2012-05-29 11:53:07.0
has current version: http://vocab.nerc.ac.uk/collection/P25/current/WINDS/1/
version: 1
in dataset: void
modified: 2026-01-21T14:22:40

Air Temperature
type: Concept
version info: 1
deprecated: false
definition: Variables associated with the determination of the air temperature near the Earth's surface.
in scheme: phyto vre thesaurus
preferred label: Température de l'air @fr
notation: SDN:OD1::AIRTEMP
note: accepted
broader: Temperature
broader: M010
broader: DS05
date: 2023-10-10 14:51:12.0
authored on: 2023-10-10 14:51:12.0
has current version: http://vocab.nerc.ac.uk/collection/OD1/current/AIRTEMP/1/
version: 1
in dataset: void

ECSO_00001535
modified: 2026-01-23T11:03:46

ECSO_00001538
modified: 2026-01-23T11:03:51

ECSO_00001539
modified: 2026-01-23T11:03:56

ECSO_00001574
modified: 2026-01-23T11:07:18

ECSO_00001575
modified: 2026-01-23T11:07:12

ECSO_00001576
modified: 2026-01-23T11:06:39

ECSO_00001578
modified: 2026-01-23T11:04:43

ECSO_00001581
modified: 2026-01-23T11:04:31

ECSO_00001582
modified: 2026-01-23T11:04:21

ECSO_00001742
modified: 2026-01-23T11:04:01