The phytoplankton component of seston in San Francisco Bay
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Abstract
Phytoplankton biomass (as carbon) was estimated from chlorophyll a concentrations (Chla) and a mean value for the ratio of phytoplankton carbon to chlorophyll a in San Francisco Bay. The ratio was determined as the slope of a Model II regression of POC' against (Chla), where POC' is total particulate organic carbon minus sediment-associated non-phytoplankton carbon. Samples from 30 fixed sites in the channel and lateral shoals of San Francisco Bay were collected once or twice a month from April to November 1980, and at irregular intervals in South Bay during 1984 and 1985. For all data the calculated mean value of phytoplankton C:Chla was 51 (95% confidence interval = 47–54). No significant differences were found in the C:Chla ratio between shallow and deep sites (where light availability differs) or between northern and southern San Francisco Bay (where phytoplankton community composition differs). Using the mean C:Chla ratio of 51, we calculated that phytoplankton biomass constitutes about one third of seston carbon under most circumstances, but this fraction ranges from about 95% during phytoplankton blooms to less than 20% during spring periods of low phytoplankton biomass and high suspended sediment concentration.
Suggested Citation
Wienke, S., Cloern, J., 1987, The phytoplankton component of seston in San Francisco Bay: Netherlands Journal of Sea Research, v. 21, no. 1, p. 25-33, https://doi.org/10.1016/0077-7579(87)90020-2.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The phytoplankton component of seston in San Francisco Bay |
| Series title | Netherlands Journal of Sea Research |
| DOI | 10.1016/0077-7579(87)90020-2 |
| Volume | 21 |
| Issue | 1 |
| Year Published | 1987 |
| Language | English |
| Publisher | Elsevier |
| Contributing office(s) | California Water Science Center, San Francisco Bay-Delta, Pacific Regional Director's Office |
| Description | 9 p. |
| First page | 25 |
| Last page | 33 |
| Country | United States |
| State | California |
| Other Geospatial | San Francisco Bay |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |