Phytoplankton Species Composition and Abundance in the Sacramento-San Joaquin River Delta: Microscopic Enumeration of USGS Samples, beginning in 2016 (ver. 2.0, December 2025)
This dataset contains multiple types of data characterizing phytoplankton in the Sacramento-San Joaquin Delta (California, USA). 1) Bright field microscopy was used to identify and enumerate phytoplankton community composition; 2) Epifluorescent microscopy was used to enumerate picophytoplankton (phytoplankton cells < 2 microns in diameter) and, 3) a categorical visual index, Microcystis Visual Index (MVI), was used to rapidly estimate the abundance of Microcystis colonies near the surface.
Revision History
First release: June 22, 2023
Revision 1.1: December 28, 2023
Revision 2.0: December 11, 2025
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Complete Metadata
| @type | dcat:Dataset |
|---|---|
| accessLevel | public |
| bureauCode |
[ "010:12" ] |
| contactPoint |
{ "fn": "Keith Bouma-Gregson", "@type": "vcard:Contact", "hasEmail": "mailto:kbouma-gregson@usgs.gov" } |
| description | This dataset contains multiple types of data characterizing phytoplankton in the Sacramento-San Joaquin Delta (California, USA). 1) Bright field microscopy was used to identify and enumerate phytoplankton community composition; 2) Epifluorescent microscopy was used to enumerate picophytoplankton (phytoplankton cells < 2 microns in diameter) and, 3) a categorical visual index, Microcystis Visual Index (MVI), was used to rapidly estimate the abundance of Microcystis colonies near the surface. Revision History First release: June 22, 2023 Revision 1.1: December 28, 2023 Revision 2.0: December 11, 2025 |
| distribution |
[ { "@type": "dcat:Distribution", "title": "Digital Data", "format": "XML", "accessURL": "https://doi.org/10.5066/P13L6RZD", "mediaType": "application/http", "description": "Landing page for access to the data" }, { "@type": "dcat:Distribution", "title": "Original Metadata", "format": "XML", "mediaType": "text/xml", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.689b9185d4be0224e628ea75.xml" } ] |
| identifier | http://datainventory.doi.gov/id/dataset/USGS_689b9185d4be0224e628ea75 |
| keyword |
[ "Aquatic Biology", "California", "Central Valley", "Ecology", "Liberty Island", "Sacramento River", "Sacramento-San Joaquin Delta", "Suisun Bay", "USGS:689b9185d4be0224e628ea75", "United States", "Water Quality", "Water Resources", "algae", "biogeochemistry", "biota", "delta", "drinking water use", "environment", "high frequency", "high-resolution", "hydrogeology", "inlandWaters", "microcystin", "nutrient content (water)", "phytoplankton", "picophytoplankton", "public supply water use", "statistical analysis", "visualization methods", "water quality" ] |
| modified | 2025-12-11T00:00:00Z |
| publisher |
{ "name": "U.S. Geological Survey", "@type": "org:Organization" } |
| spatial | -122.5336, 37.4199, -120.8037, 40.2880 |
| theme |
[ "geospatial" ] |
| title | Phytoplankton Species Composition and Abundance in the Sacramento-San Joaquin River Delta: Microscopic Enumeration of USGS Samples, beginning in 2016 (ver. 2.0, December 2025) |
