Spatial and temporal variability of picocyanobacteria Synechococcus sp. in San Francisco Bay
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Abstract
We collected samples monthly, from April to August 1998, to measure the abundance of autotrophic picoplankton in San Francisco Bay. Samples taken along a 160-km transect showed that picocyanobacteria (Synechococcus sp.) was a persistent component of the San Francisco Bay phytoplankton in all the estuarine habitats, from freshwater to seawater and during all months of the spring-summer transition. Abundance ranged from 4.6 X 106 to 5.2 X 108 cells L-1, with peak abundance during the spring bloom (April and May) and during July with a persistent spatial pattern of smallest abundance near the coastal ocean and highest abundance in the landward domains of the estuary. The picocyanobacterial component (as estimated percentage of chlorophyll a concentration) was, on average, 15% of total phytoplankton biomass during the summer-autumn nonbloom periods and only 2% of chlorophyll biomass during the spring bloom. This result is consistent with the emerging concept of a gradient of increasing importance of picocyanobacteria along the gradient of decreasing nutrient concentrations from estuaries to the open ocean.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Spatial and temporal variability of picocyanobacteria Synechococcus sp. in San Francisco Bay |
| Series title | Limnology and Oceanography |
| DOI | 10.4319/lo.2000.45.3.0695 |
| Volume | 45 |
| Issue | 3 |
| Publication Date | April 26, 2000 |
| Year Published | 2000 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | California Water Science Center, San Francisco Bay-Delta, Toxic Substances Hydrology Program, Pacific Regional Director's Office |
| Description | 8 p. |
| First page | 695 |
| Last page | 702 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |