Trophic structure and avian communities across a salinity gradient in evaporation ponds of the San Francisco Bay estuary

2010 ◽  
pp. 307-327
Author(s):  
J. Y. Takekawa ◽  
A. K. Miles ◽  
D. H. Schoellhamer ◽  
N. D. Athearn ◽  
M. K. Saiki ◽  
...  
Keyword(s):  
San Francisco ◽  
Trophic Structure ◽  
San Francisco Bay ◽  
Salinity Gradient ◽  
Avian Communities ◽  
San Francisco Bay Estuary ◽  
Evaporation Ponds

Trophic structure and avian communities across a salinity gradient in evaporation ponds of the San Francisco Bay estuary

Hydrobiologia ◽  
2006 ◽  
Vol 567 (1) ◽  
pp. 307-327 ◽  
Author(s):  
J. Y. Takekawa ◽  
A. K. Miles ◽  
D. H. Schoellhamer ◽  
N. D. Athearn ◽  
M. K. Saiki ◽  
...  
Keyword(s):  
San Francisco ◽  
Trophic Structure ◽  
San Francisco Bay ◽  
Salinity Gradient ◽  
Avian Communities ◽  
San Francisco Bay Estuary ◽  
Evaporation Ponds

Avian communities in baylands and artificial salt evaporation ponds of the San Francisco Bay estuary

Saline Lakes ◽  
2001 ◽  
pp. 317-328 ◽  
Author(s):  
John Y. Takekawa ◽  
Corinna T. Lu ◽  
Ruth T. Pratt
Keyword(s):  
San Francisco ◽  
San Francisco Bay ◽  
Avian Communities ◽  
San Francisco Bay Estuary ◽  
Evaporation Ponds ◽  
Salt Evaporation Ponds

Late Holocene δ13C and pollen records of paleosalinity from tidal marshes in the San Francisco Bay estuary, California

2004 ◽  
Vol 62 (2) ◽  
pp. 134-145 ◽  
Author(s):  
Frances Malamud-Roam ◽  
B. Lynn Ingram
Keyword(s):  
Fresh Water ◽  
San Francisco ◽  
Late Holocene ◽  
Vegetation Change ◽  
Stable Carbon Isotopes ◽  
San Francisco Bay ◽  
Salinity Gradient ◽  
Relative Proportion ◽  
Water Inflow ◽  
San Francisco Bay Estuary

Records of stable carbon isotopes (δ13C) are presented from cores collected from four San Francisco Bay marshes and used as a proxy for changes in estuary salinity. The δ13C value of organic marsh sediments are a reflection of the relative proportion of C3 vs. C4 plants occupying the surface, and can thus be used as a proxy for vegetation change on the marsh surface. The four marshes included in this study are located along a natural salinity gradient that exists in the San Francisco Bay, and records of vegetation change at all four sites can be used to infer changes in overall estuary paleosalinity. The δ13C values complement pollen data from the same marsh sites producing a paleoclimate record for the late Holocene period in the San Francisco Bay estuary. The data indicate that there have been periods of higher-than-average salinity in the Bay estuary (reduced fresh water inflow), including 1600–1300 cal yr B.P., 1000–800 cal yr B.P., 300–200 cal yr B.P., and ca. A.D. 1950 to the present. Periods of lower-than-average salinity (increased fresh water inflow) occurred before 2000 cal yr B.P., from 1300 to 1200 cal yr B.P. and ca. 150 cal yr B.P. to A.D. 1950. A comparison of the timing of these events with records from the California coast, watershed, and beyond the larger drainage of the Bay reveals that the paleosalinity variations reflected regional precipitation.

Parsing the DOM sources using calibrated biomarkers in the San Francisco Bay Estuary

2020 ◽  
Author(s):  
Chia-Ying Chuang ◽  
Francois Guillemette ◽  
Jennifer Harfmann ◽  
Karl Kaiser ◽  
Robert Spencer ◽  
...  
Keyword(s):  
San Francisco ◽  
Cold Water ◽  
San Francisco Bay ◽  
Salinity Gradient ◽  
The United States ◽  
Algal Production ◽  
San Francisco Bay Estuary ◽  
San Joaquin River ◽  
Low Levels ◽  
Vast Area

<p>The San Francisco Bay Estuary (SFBE) together with the Sacramento–San Joaquin River Delta is the second largest estuary in the United States and represents a highly dynamic ecosystem. From 2014 to 2016, we conducted three transects across a salinity gradient to investigate the roles of sources, hydrologic and seasonal changes on the DOM composition. Sampling started with a riverine endmember, through a vast area of marshes, wetlands, to the Golden Gate, the largest estuary in western North America. The winter transect at its maximum discharge allowed the study of DOM dynamics largely in the absence of photodegradation processes and low levels of algal production; the summer transect captured significant photodegradation and algal production; the spring transect revealed the signal of stored DOM from the snowmelt cold water flows. Multiple studies indicated that algal primary production alone cannot support the SFBE foodweb, and the wetlands could also serve to reduce DOM loadings coming off of the delta.  Hence, other sources of organic matter must be considered, including autochthonous and allochthonous DOM. Terrestrial DOM export in SFBE were revealed by dissolved lignin dynamics. Optical proxies (UV-vis and fluorescence) were also used to study the photochemical and biological transformations of DOM.</p>

Spionidae (Polychaeta, Annelida). Invertebrates of the San Francisco Bay Estuary System.William J. Light

1979 ◽  
Vol 54 (3) ◽  
pp. 342-342 ◽  
Author(s):  
Theodore H. DeWitt
Keyword(s):  
San Francisco ◽  
San Francisco Bay ◽  
San Francisco Bay Estuary

California Gull population growth and ecological impacts in the San Francisco Bay estuary, 1980–2016

2018 ◽  
pp. 180-189 ◽  
Author(s):  
Catherine E. Burns ◽  
Joshua T. Ackerman ◽  
Natalie B. Washburn ◽  
Jill Bluso-Demers ◽  
Caitlin Robinson-Nilsen ◽  
...  
Keyword(s):  
Population Growth ◽  
San Francisco ◽  
San Francisco Bay ◽  
Ecological Impacts ◽  
San Francisco Bay Estuary
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