https://doi.org/10.6073/pasta/60edabfbfd85c623fce05822befaa071 https://calcofi.io/datasets/calcofi_phytoplankton/ Phytoplankton Elizabeth L. Venrick UCSD SIO evenrick@ucsd.edu 2026-10-21 eng Abundance and species composition of phytoplankton (385 taxonomic categories) in the California Current, 1996-2022, by inverted-microscope counts (E. Venrick). Samples from the near-surface "second depth" are pooled across stations into four regions (NE, SE, Alley, Offshore; Hayward & Venrick 1998) before counting, so the grain is cruise x region, not per-station. Source: EDI knb-lter-cce.254.4. EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > AQUATIC ECOSYSTEMS > PLANKTON > PHYTOPLANKTON EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > PROTISTS > PLANKTON > PHYTOPLANKTON GCMD Science Keywords Phytoplankton Biomass and Diversity Phytoplankton phytoplankton_abundance cells/L This work is licensed under a CC0 1.0 Universal (public domain dedication). CC0 1.0 Universal (public domain dedication) https://creativecommons.org/publicdomain/zero/1.0/ CC0-1.0 https://calcofi.io/datasets/calcofi_phytoplankton/ 32.4–33.6°N, 121.7–118.8°W -121.6543 -118.7603 33.5668 32.4352 1996 2022 Phytoplankton species Acanthoica quattrospina 235802 species Actiniscus pentasterias 109717 genus Actinocyclus 148944 variety Actinocyclus octonarius var. octonarius 162770 species Actinocyclus senarius 162810 genus Actinoptychus 148947 species Akashiwo sanguinea 232546 genus Algirosphaera 235910 species Amphidoma nucula 233201 genus Amphiprora 149140 genus Amylax 109518 species Asterionella glacialis 148955 species Asterolampra marylandica 248070 species Asteromphalus heptactis 162258 genus Azpeitia 149650 class Bacillariophyceae diatoms 148899 genus Bacteriastrum 149118 species Bacteriastrum biconicum 418485 species Bacteriastrum comosum 248066 species Bacteriastrum delicatulum 164108 species Bacteriastrum elegans 418486 species Bacteriastrum elongatum 162916 species Bacteriastrum hyalinum 149119 species Bacteriastrum mediterraneum 418487 species Biddulphia weissflogii 465381 genus Blepharocysta 109548 species Braarudosphaera bigelowii 235922 genus Brachidinium 231770 species Brachidinium capitatum 232115 species Calcidiscus leptoporus 235923 species Calciosolenia brasiliensis 555889 species Calciosolenia murrayi 235926 species Calyptrolithina wettsteinii 612208 genus Calyptrolithophora 235827 species Calyptrolithophora gracillima 235891 species Calyptrolithophora hasleana 236004 genus Calyptrosphaera 235828 genus Centrodinium 109526 species Cerataulina pelagica 149619 species Ceratium divaricatum 233246 genus Ceratocorys 109507 species Ceratocorys armata 109984 species Ceratolithus cristatus 235933 genus Chaetoceros 148985 species Chaetoceros aequatorialis 254448 species Chaetoceros affinis 149241 species Chaetoceros anastomosans 149292 species Chaetoceros atlanticus 149288 species Chaetoceros bacteriastroides 465386 species Chaetoceros borealis 149124 species Chaetoceros compressus 149129 species Chaetoceros constrictus 156609 species Chaetoceros costatus 149289 species Chaetoceros curvisetus 149221 species Chaetoceros dadayi 465390 species Chaetoceros danicus 149120 species Chaetoceros debilis 149219 species Chaetoceros decipiens 149126 species Chaetoceros didymus 149122 species Chaetoceros eibenii 160521 species Chaetoceros laciniosus 149228 species Chaetoceros lorenzianus 156617 species Chaetoceros messanense 418509 species Chaetoceros neogracilis 178207 species Chaetoceros peruvianus 178185 species Chaetoceros radicans 163112 species Chaetoceros septentrionalis 962003 species Chaetoceros seychellarum 961885 species Chaetoceros socialis 149123 species Chaetoceros teres 149125 species Chaetoceros tetrastichon 178241 species Cladopyxis brachiolata 109989 species Climacodium biconcavum 418539 class Coccolithophyceae 592906 species Coccolithus pelagicus 178600 species Corethron criophilum 149110 genus Corisphaera 235829 genus Coronosphaera 235934 species Coronosphaera mediterranea 235944 genus Corythodinium 109527 variety Coscinodiscus africanus var. africanus 977643 species Coscinodiscus angustelineatus 964359 species Coscinodiscus centralis 149159 species Coscinodiscus concinnus 148992 species Coscinodiscus curvatulus 149266 species Coscinodiscus granii 149271 species Coscinodiscus marginatus 156629 species Coscinodiscus oculus-iridis 341484 species Coscinodiscus perforatus 149272 species Coscinodiscus radiatus 149158 species Coscinodiscus sol 573437 variety Coscinodiscus stellaris var. stellaris 975029 species Coscinodiscus wailesii 156632 genus Coscinosira 148926 genus Crystallolithus 235838 species Cylindrotheca closterium 149004 genus Deutschlandia 235935 species Dictyocha fibula 157463 class Dictyochophyceae 146232 class Dinophyceae dinoflagellates 19542 genus Dinophysis 109462 species Dinophysis acuminata 109603 species Dinophysis acuta 109604 species Dinophysis caudata 109612 species Dinophysis hastata 109627 species Dinophysis tripos 109662 species Dinophysis uracantha 109664 species Discosphaera tubifera 573399 species Ditylum brightwellii 149023 genus Erythropsidinium 231793 species Ethmodiscus punctiger 148941 species Eucampia zoodiacus 616809 species Florisphaera profunda 235952 genus Fragilariopsis 149313 species Fragilariopsis doliolus 366281 species Fragilariopsis pseudonana 341558 genus Gephyrocapsa 235823 species Gephyrocapsa huxleyi 236056 species Gephyrocapsa oceanica 235955 species Gephyrocapsa ornata 235956 genus Glenodinium 109538 genus Gonyaulax 109519 species Gonyaulax areolata 233495 species Gonyaulax diegensis 110014 species Gonyaulax digitale 110015 species Gonyaulax fragilis 110019 species Gonyaulax polygramma 110035 species Gonyaulax turbynei 110043 variety Guinardia blavyana var. blavyana 975336 genus Gyrosigma 149033 genus Halopappus 235859 species Haslea wawrikae 248063 genus Helicosphaera 235863 genus Helicotheca 157438 genus Helladosphaera 235841 genus Hemiaulus 163248 species Hemiaulus hauckii 163249 species Hemiaulus membranaceus 418540 species Hemiaulus sinensis 163250 species Hemidiscus cuneiformis 180367 genus Heterodinium 109522 genus Histioneis 109463 genus Kofoidinium 109499 species Lauderia annulata 149135 species Lauderia mediterranea 163261 species Lauderia pumila 163226 genus Leptocylindrus 149038 species Leucocryptos marina 119077 genus Licmophora 149342 species Lingulaulax polyedra 1778370 genus Lioloma 292726 genus Liriogramma 601779 species Lithodesmium undulatum 149322 species Margalefidinium catenatum 990878 species Mastogloia rostrata 958143 genus Meringosphaera 115075 genus Mesoporos 109564 species Micracanthodinium setiferum 109993 species Navicula challengeri 573488 species Navicula gigantea 573491 genus Nitzschia 149045 species Nitzschia bicapitata 341566 species Nitzschia kolaczekii 700193 species Nitzschia marina 418205 species Nitzschia sicula 341379 species Noctiluca scintillans sea sparkle 109921 genus Octactis 369960 species Octactis speculum 1310442 genus Odontella 148963 species Oolithotus fragilis 235962 genus Ophiaster 115081 genus Oxytoxum 109528 species Oxytoxum adriaticum 110079 species Oxytoxum curvatum 110090 species Oxytoxum laticeps 110097 species Oxytoxum longum 110100 species Oxytoxum scolopax 110115 species Oxytoxum turbo 233871 genus Palaeophalacroma 109512 species Palaeophalacroma verrucosum 109996 species Palusphaera vandelii 613388 species Peridiniella danica 233369 genus Peridinium 109549 species Peridinium minusculum 233476 species Periphyllophora mirabilis 235877 genus Phaeocystis 115088 species Phalacroma oxytoxoides 624358 genus Pleurosigma 149181 species Pleurosigma directum 248088 species Pleurosigma nicobaricum 509591 family Pleurosigmataceae 149032 species Podolampas bipes 110199 species Podolampas palmipes 232625 species Podolampas spinifera 110202 genus Podosira 149059 genus Pontosphaera 115082 species Pontosphaera discopora 235970 genus Porosira 148980 species Proboscia alata 149168 genus Pronoctiluca 109487 species Pronoctiluca pelagica 109903 genus Prorocentrum 109566 species Prorocentrum dactylus 110297 species Prorocentrum gracile 110300 species Prorocentrum micans 110303 species Prorocentrum obtusidens 110307 species Prorocentrum rostratum 110311 species Prorocentrum rotundatum 110312 species Prorocentrum vaginulum 110317 genus Protoceratium 109567 species Protoceratium areolatum 110319 genus Protoperidinium 109553 species Protoperidinium depressum 110217 species Protoperidinium leonis 110229 species Protoperidinium pallidum 110244 species Protoperidinium tenuissimum 232882 genus Pseudo-nitzschia 149151 species Pseudosolenia calcar-avis 163344 genus Pterosperma 160595 species Pterosperma marginatum 376082 species Ptychodiscus noctiluca 109888 genus Pyrocystis 109571 species Pyrocystis acuta 232277 species Pyrocystis fusiformis ocean night light 110328 species Pyrocystis lunula 164053 genus Pyrophacus 109555 genus Rhabdosphaera 235966 species Rhabdosphaera clavigera 235972 genus Rhizosolenia 149069 species Rhizosolenia cylindrus 163242 species Rhizosolenia delicatula 149114 species Rhizosolenia flaccida 160530 forma Rhizosolenia fragilissima f. fragilissima 985165 forma Rhizosolenia hebetata f. hebetata 163347 species Rhizosolenia imbricata 149116 species Rhizosolenia robusta 149311 species Rhizosolenia semispina 163348 species Rhizosolenia styliformis 149629 family Rhizosoleniaceae 149068 species Richelia intracellularis 376490 species Roperia tesselata 149105 species Skeletonema costatum 149074 genus Spatulodinium 109502 genus Spiraulax 109521 species Stephanopyxis turris 149631 species Sundstroemia setigera 1590706 species Syndendrium diadema 163042 genus Syracolithus 235846 genus Syracosphaera 115084 species Syracosphaera anthos 555903 species Syracosphaera histrica 235976 species Syracosphaera molischii 236039 species Syracosphaera pirus 235977 species Syracosphaera prolongata 235978 species Syracosphaera pulchra 235979 species Thalassionema bacillare 418647 species Thalassionema frauenfeldii 555052 species Thalassionema nitzschioides 149093 genus Thalassiosira 148912 species Thalassiosira aestivalis 345529 species Thalassiosira allenii 573627 species Thalassiosira eccentrica 148922 species Thalassiosira endoseriata 573639 species Thalassiosira gravida 149102 species Thalassiosira lineata 345546 species Thalassiosira simonsenii 573654 species Thalassiosira subtilis 149101 genus Thalassiothrix 157081 species Thalassiothrix longissima 157083 species Thoracosphaera heimii 110277 genus Torodinium 109479 genus Tripos 494057 species Tripos arietinus 841182 species Tripos brevis 841189 species Tripos candelabrum 841193 species Tripos carriensis 837448 species Tripos concilians 841198 species Tripos declinatus 841202 species Tripos falcatiformis 837221 species Tripos falcatus 837220 species Tripos furca 840627 species Tripos fusus 840626 species Tripos gibberus 837222 species Tripos horridus 837453 species Tripos lineatus 837459 species Tripos macroceros 841260 species Tripos massiliensis 841261 species Tripos minutus 841263 species Tripos muelleri 495363 species Tripos pentagonus 841746 species Tripos teres 1381154 species Umbellosphaera irregularis 235982 species Umbellosphaera tenuis 235983 species Umbilicosphaera hulburtiana 235984 species Umbilicosphaera sibogae 235985 archived California Cooperative Oceanic Fisheries Investigations evenrick@ucsd.edu sample One row per physical sampling event at its native grain (site, tow, net, subsample, cast, bottle, water, filter, underway, transect, sighting, deployment, scan, region pool). An adjacency list: parent_sample_key points at the containing event and root_sample_key at the top of the chain, so counting distinct events at any level is a single GROUP BY. sample_key Sample Key Globally unique event key, namespaced dataset_key:sample_type:id so the same integer id in two datasets — or at two event levels in one dataset — never collides. VARCHAR Globally unique event key, namespaced dataset_key:sample_type:id so the same integer id in two datasets — or at two event levels in one dataset — never collides. sample_type Sample Type Event grain: site, tow, net, subsample, cast, bottle, water (an eDNA water sample), filter (an eDNA water filter), underway, transect (a visual-survey effort segment), sighting, deployment (a sonobuoy), scan (one analysed hour of a recording) or region_pool. VARCHAR Event grain: site, tow, net, subsample, cast, bottle, water (an eDNA water sample), filter (an eDNA water filter), underway, transect (a visual-survey effort segment), sighting, deployment (a sonobuoy), scan (one analysed hour of a recording) or region_pool. parent_sample_key Parent Sample Key The containing event (net → tow → site; bottle → cast; sighting → transect; scan → deployment). NULL at the top of the chain. Flat adjacency list: attributes are not inherited. VARCHAR The containing event (net → tow → site; bottle → cast; sighting → transect; scan → deployment). NULL at the top of the chain. Flat adjacency list: attributes are not inherited. root_sample_key Root Sample Key Top of this event's containment chain; equals sample_key for single-level datasets. Use count(DISTINCT root_sample_key) to count stations/casts irrespective of grain. VARCHAR Top of this event's containment chain; equals sample_key for single-level datasets. Use count(DISTINCT root_sample_key) to count stations/casts irrespective of grain. dataset_key Dataset Key Provenance stamp: provider_dataset. VARCHAR Provenance stamp: provider_dataset. grid_key Grid Key CalCOFI station grid cell. NULL where the dataset has no station assignment (region-pooled phytoplankton). VARCHAR CalCOFI station grid cell. NULL where the dataset has no station assignment (region-pooled phytoplankton). site_key Site Key CalCOFI station natural key as the source records it (line/station, e.g. 090.0 060.0). Present on 13 of the 18 source event tables, so it is carried on the event dimension rather than lost to consolidation; grid_key is the derived grid cell, this is the source's own station id. VARCHAR CalCOFI station natural key as the source records it (line/station, e.g. 090.0 060.0). Present on 13 of the 18 source event tables, so it is carried on the event dimension rather than lost to consolidation; grid_key is the derived grid cell, this is the source's own station id. cruise_key Cruise Key CalCOFI cruise natural key YYYY-MM-NODC. VARCHAR CalCOFI cruise natural key YYYY-MM-NODC. order_occ Order of Occupation Order in which the station was occupied on the cruise. Source spelling varies (order_occ, ord_occ) and CTD stores it as text; normalised to an integer here. INTEGER dimensionless integer latitude Latitude Event latitude (WGS84). DOUBLE degree real longitude Longitude Event longitude (WGS84). DOUBLE degree real datetime Datetime Event start time (UTC). TIMESTAMP YYYY-MM-DDThh:mm:ss depth_min_m Depth Min Shallowest depth sampled by this event. DOUBLE meter real depth_max_m Depth Max Deepest depth sampled by this event; for swfsc_ichthyo tows and nets the maximum possible depth of the net (SWFSC Net.NetDepth, nominal: over a shallower sea floor the net did not reach it). DOUBLE meter real tow_type Tow Type Net gear code where the dataset records one (C1/CB/CV/PV oblique or vertical, MT manta); NULL for gears and datasets without one. Needed to compute gear-appropriate CPUE. VARCHAR Net gear code where the dataset records one (C1/CB/CV/PV oblique or vertical, MT manta); NULL for gears and datasets without one. Needed to compute gear-appropriate CPUE. data_stage Data Stage The source's own processing state for this event: final (post-cruise calibrations applied) or preliminary (not for publication — the source warns that oxygen, nitrate and chlorophyll may change significantly once calibrated). Populated by calcofi_ctd-cast; NULL where the dataset draws no such distinction, which is not a claim that the data are final. VARCHAR The source's own processing state for this event: final (post-cruise calibrations applied) or preliminary (not for publication — the source warns that oxygen, nitrate and chlorophyll may change significantly once calibrated). Populated by calcofi_ctd-cast; NULL where the dataset draws no such distinction, which is not a claim that the data are final. geom Geometry Point geometry minted from longitude/latitude (OGC:CRS84). GEOMETRY('EPSG:4326') Point geometry minted from longitude/latitude (OGC:CRS84). source_uuid Source Uuid Source Uuid UUID Source Uuid hex7 H3 Cell (res 7) One UBIGINT H3 cell at resolution 7: the parent of the resolution-10 cell of this event's own latitude / longitude (not the resolution-7 cell the position falls in), defined exactly as obs_bio.hex7 / obs_env.hex7; NULL without a finite position. Lets a per-sample value in sample_measurement be drawn in hexagons. An observation carries its own position, so a CTD scan can sit in another cell than its cast. UBIGINT dimensionless whole seafloor_depth_m seafloor_depth_m DOUBLE dimensionless real station_uuid station_uuid UUID station_uuid station_uuid_method station_uuid_method VARCHAR station_uuid_method obs The occurrence-headline long table: one scalar measurement per row, environmental (realm = 'env') and biological (realm = 'bio') together. Biological taxon is the global taxon_key; sub-occurrence detail (length/stage bins, behavior) lives in obs_attribute, and event-level effort in sample_measurement. data_0.parquet 253033 437b61494721355cee8b18c2ba818e5a197f5e998ef273c880c60a5832a7ba26 Apache Parquet https://storage.googleapis.com/calcofi-db/ducklake/tables/obs/dataset_key=calcofi_phytoplankton/dae4bc332c929c5bbf8e26ee/data_0.parquet obs_id Observation ID Surrogate key, renumbered globally when the release concatenates the per-dataset shards. BIGINT dimensionless integer realm Realm env for physical/chemical measurements, bio for organism observations. VARCHAR env for physical/chemical measurements, bio for organism observations. dataset_key Dataset Key Provenance stamp: provider_dataset. VARCHAR Provenance stamp: provider_dataset. sample_key Sample Key The sampling event this observation came from; joins sample. VARCHAR The sampling event this observation came from; joins sample. grid_key Grid Key CalCOFI station grid cell, denormalized from sample so rollups need no join. NULL for region-pooled data. VARCHAR CalCOFI station grid cell, denormalized from sample so rollups need no join. NULL for region-pooled data. cruise_key Cruise Key Cruise, denormalized from sample so rollups need no join. VARCHAR Cruise, denormalized from sample so rollups need no join. latitude Latitude Observation latitude (WGS84). DOUBLE degree real longitude Longitude Observation longitude (WGS84). DOUBLE degree real datetime Datetime Observation time (UTC). NULL for region-pooled data with no event time. TIMESTAMP YYYY-MM-DDThh:mm:ss depth_min_m Depth Min Shallowest depth this observation represents. DOUBLE meter real depth_max_m Depth Max Deepest depth this observation represents; equal to depth_min_m for point measurements (bottle, CTD scan). DOUBLE meter real taxon_key Taxon Key Global taxon key, worms:<AphiaID> or itis:<TSN> for birds. NULL for env rows. Joins taxon. VARCHAR Global taxon key, worms:<AphiaID> or itis:<TSN> for birds. NULL for env rows. Joins taxon. life_stage Life Stage Life stage where the source resolves one (larva, adult, juvenile, egg, phyllosoma). VARCHAR Life stage where the source resolves one (larva, adult, juvenile, egg, phyllosoma). measurement_type Measurement Type Measured quantity; joins the measurement_type vocabulary. VARCHAR Measured quantity; joins the measurement_type vocabulary. measurement_value Measurement Value The measured value, in the units measurement_type declares. DOUBLE dimensionless real measurement_qual Measurement Qualifier Source quality flag, verbatim. VARCHAR Source quality flag, verbatim. measurement_prec Measurement Precision Source-reported precision where available. DOUBLE dimensionless real hex_id Hex ID H3 cell at resolution 10, stored as UBIGINT. Aggregate coarser at query time with h3_cell_to_parent(hex_id, res) — there is no per-resolution column ladder. UBIGINT dimensionless whole taxon Taxonomic hierarchy for species via WoRMS and ITIS authorities (built from spp.duckdb via recursive CTEs) taxon_key Taxon Key Global taxon key: lowercase authority prefix plus id, worms:127023 or itis:176754. VARCHAR Global taxon key: lowercase authority prefix plus id, worms:127023 or itis:176754. worms_id WoRMS ID WoRMS AphiaID. INTEGER dimensionless integer itis_id ITIS ID ITIS Taxonomic Serial Number. INTEGER dimensionless integer gbif_id GBIF ID GBIF backbone taxon key. INTEGER dimensionless integer ncbi_id NCBI ID NCBI Taxonomy id. INTEGER dimensionless integer inat_id iNaturalist ID iNaturalist taxon id. INTEGER dimensionless integer scientific_name Scientific Name Accepted scientific name. VARCHAR Accepted scientific name. common_name Common Name Common name where one is recorded. VARCHAR Common name where one is recorded. rank Rank Taxonomic rank. VARCHAR Taxonomic rank. rank_order Rank Order Ordinal for sorting ranks from kingdom down. INTEGER dimensionless integer taxonomic_status Taxonomic Status Status as fetched from the keying authority (accepted, unaccepted, superseded combination, ...). Read it with status_checked — before v2026.08.05 this column was the literal string "accepted" on every row, stamped rather than fetched. VARCHAR Status as fetched from the keying authority (accepted, unaccepted, superseded combination, ...). Read it with status_checked — before v2026.08.05 this column was the literal string "accepted" on every row, stamped rather than fetched. status_checked Status Checked Date taxonomic_status was last confirmed against the authority. A status with no check date is not a fact. VARCHAR Date taxonomic_status was last confirmed against the authority. A status with no check date is not a fact. parent_taxon_key Parent Taxon Key Lineage parent; walk this to expand a taxon to its descendants. VARCHAR Lineage parent; walk this to expand a taxon to its descendants. kingdom Kingdom Kingdom. VARCHAR Kingdom. phylum Phylum Phylum. VARCHAR Phylum. class Class Class. VARCHAR Class. order_taxon Order Order (named order_taxon because order is a SQL keyword). VARCHAR Order (named order_taxon because order is a SQL keyword). family Family Family. VARCHAR Family. notes Notes Append-only provenance log, one datestamped line per entry: how each id was resolved and any re-key onto an authority-accepted id (e.g. itis:174553 Puffinus griseus -> itis:1255050 Ardenna grisea). The dataset's own original code and name stay in dataset_taxon. VARCHAR Append-only provenance log, one datestamped line per entry: how each id was resolved and any re-key onto an authority-accepted id (e.g. itis:174553 Puffinus griseus -> itis:1255050 Ardenna grisea). The dataset's own original code and name stay in dataset_taxon. dataset_taxon Crosswalk from each dataset's own taxon vocabulary to the global taxon_key. obs resolves its taxon by joining this on (dataset_key, ds_taxa_code), so a dataset can keep its local codes without leaking them into the shared model. ds_taxon_key Dataset Taxon Key Key of this crosswalk row, <dataset-or-known-list>:<local code>. VARCHAR Key of this crosswalk row, <dataset-or-known-list>:<local code>. dataset_key Dataset Key The dataset whose vocabulary this row belongs to. VARCHAR The dataset whose vocabulary this row belongs to. taxon_key Taxon Key The global taxon it resolves to; joins taxon. VARCHAR The global taxon it resolves to; joins taxon. ds_scientific_name Dataset Scientific Name Scientific name as the source dataset spells it. VARCHAR Scientific name as the source dataset spells it. ds_common_name Dataset Common Name Common name as the source dataset spells it. VARCHAR Common name as the source dataset spells it. ds_taxa_code Dataset Taxa Code The dataset's own code, as stored on its measurement rows. VARCHAR The dataset's own code, as stored on its measurement rows. ds_source_json Ds Source Json Ds Source Json VARCHAR Ds Source Json taxon_group Portable groupings of taxa (phytoplankton functional groups, seabirds, marine mammals). Many taxa per group; a taxon may belong to several. taxon_group_key Taxon Group Key Group key, <dataset-or-known-list>:<group>. VARCHAR Group key, <dataset-or-known-list>:<group>. description Description Human-readable description of the group. VARCHAR Human-readable description of the group. taxon_key Taxon Key A member taxon; joins taxon. VARCHAR A member taxon; joins taxon. region The 4 pooled regions defined on the CalCOFI grid (Hayward & Venrick 1998), with the member station codes the source declares and a POLYGON derived from them: each declared station claims the water nearest to it, clipped to the convex hull of all 34 stations and dissolved by region, so the four tile their pooled domain with no overlap and no gaps. Stations are placed by the +proj=calcofi transform rather than a grid lookup, which is what lets the six intermediate inshore stations with no cell in the regularized grid resolve. latitude/longitude is an interior representative point, not a centroid (the regions are concave). Land is not erased. See questions Q01. region.parquet 4018 3cd3267556a56a9ed1eb4481964db389d80c822dcd501b696b50925fbe21260c Apache Parquet https://storage.googleapis.com/calcofi-db/ducklake/tables/region/b0b4ead4d403485c9fc0e93c/region.parquet region_key Region Pooled-region code: NE, SE, Alley, or Offshore (primary key). VARCHAR Pooled-region code: NE, SE, Alley, or Offshore (primary key). description Description Region description (Northern Inshore, Southern Inshore, California Current, Central Pacific). VARCHAR Region description (Northern Inshore, Southern Inshore, California Current, Central Pacific). latitude Latitude Provisional region centroid latitude (mean of member CalCOFI stations; Q01). DOUBLE degree real longitude Longitude Provisional region centroid longitude (mean of member CalCOFI stations; Q01). DOUBLE degree real n_stations Number of Stations Count of CalCOFI grid stations defining the region. INTEGER dimensionless integer station_codes Station Codes Member CalCOFI line.station codes (Hayward & Venrick 1998). VARCHAR Member CalCOFI line.station codes (Hayward & Venrick 1998). geom Geom Geom GEOMETRY('EPSG:4326') Geom measurement_type measurement_type Measurement Type Measurement Type VARCHAR Measurement Type description Description Description VARCHAR Description units Units Units VARCHAR Units valid_min Valid Min Valid Min DOUBLE dimensionless real valid_max Valid Max Valid Max DOUBLE dimensionless real valid_depth_min_m Valid Depth Min M Valid Depth Min M DOUBLE dimensionless real valid_depth_max_m Valid Depth Max M Valid Depth Max M DOUBLE dimensionless real derivation Derivation Derivation VARCHAR Derivation is_canonical Is Canonical Is Canonical BOOLEAN Is Canonical _source_column Source Column Source Column VARCHAR Source Column _source_table Source Table Source Table VARCHAR Source Table _source_datasets Source Datasets Source Datasets VARCHAR Source Datasets _qual_column Qual Column Qual Column VARCHAR Qual Column _prec_column Prec Column Prec Column VARCHAR Prec Column grain Grain Grain VARCHAR Grain denominator Denominator Denominator VARCHAR Denominator category Category Category VARCHAR Category variable Variable Variable VARCHAR Variable nerc_p01 Nerc P01 Nerc P01 VARCHAR Nerc P01 units_nerc_p06 Units Nerc P06 Units Nerc P06 VARCHAR Units Nerc P06 provider Provider Provider VARCHAR Provider dataset Dataset Dataset VARCHAR Dataset CalCOFI - Scripps Institution of Oceanography, California Current Ecosystem LTER, and E. Venrick. 2023. Temporal and spatial changes of the abundance and species composition of phytoplankton in the California Current from samples collected aboard CalCOFI cruises from summer 1996 through 2022. ver 4. Environmental Data Initiative. https://doi.org/10.6073/pasta/60edabfbfd85c623fce05822befaa071 calcofi_phytoplankton https://calcofi.io/datasets/calcofi_phytoplankton/ v2026.10.21 CalCOFI (2026). CalCOFI Integrated Database, release v2026.10.21 [Data set]. Scripps Institution of Oceanography, NOAA Fisheries, and California Department of Fish and Wildlife. https://calcofi.io/db-schema/?v=v2026.10.21 2026-10-21