| 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. |
| Genre: | Article |
| ProdID: | 70022211 |
| Citation Author: | Ning, X.; Cloern, J. E.; Cole, B. E. |
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| Citation End Page: | 702 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Limnology and Oceanography |
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| Citation Number Of Pages: | 8 |
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| Citation Search Results Text: | Spatial and temporal variability of picocyanobacteria Synechococcus sp. in San Francisco Bay; 2000; Article; Journal; Limnology and Oceanography; Ning, X.; Cloern, J. E.; Cole, B. E. |
| Citation Start Page: | 695 |
| Citation Volume: | 45 |
| Citation Year: | 2000 |
| Type: | citation/reference |
| Text: | Spatial and temporal variability of picocyanobacteria Synechococcus sp. in San Francisco Bay; 2000; Article; Journal; Limnology and Oceanography; Ning, X.; Cloern, J. E.; Cole, B. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sat, 1 Jan 2000 00:00 -0600 |
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