scholarly journals Late Holocene sedimentary environments of south San Francisco Bay, California, illustrated in gravity cores

2014 ◽  
Author(s):  
Donald L. Woodrow ◽  
Theresa A. Fregoso ◽  
Florence L. Wong ◽  
Bruce E. Jaffe
Keyword(s):  
San Francisco ◽  
Late Holocene ◽  
San Francisco Bay ◽  
Sedimentary Environments

Widening diet breadth, declining foraging efficiency, and prehistoric harvest pressure: ichthyofaunal evidence from the Emeryville Shellmound, California

Antiquity ◽  
1997 ◽  
Vol 71 (274) ◽  
pp. 845-862 ◽  
Author(s):  
Jack M. Broughton
Keyword(s):  
San Francisco ◽  
Late Holocene ◽  
San Francisco Bay ◽  
Diet Breadth ◽  
Foraging Efficiency ◽  
Native Peoples ◽  
Fish Remains ◽  
Harvest Pressure

The Emeryville Shellmound is a famous but now destroyed midden once located on the east shore of San Francisco Bay. Analyses of the fish remains from the stratified late Holocene deposits indicate that prehistoric peoples had substantial impacts on the sturgeon populations of the Bay. This calls into question the commonly held belief that native peoples lived in harmony with nature and has important implications for the management of modern vertebrate populations.

Late Holocene Marsh Expansion in Southern San Francisco Bay, California

2013 ◽  
Vol 36 (3) ◽  
pp. 643-653 ◽  
Author(s):  
Elizabeth Burke Watson ◽  
Roger Byrne
Keyword(s):  
San Francisco ◽  
Late Holocene ◽  
San Francisco Bay

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.

A Qualitative Study of Ecstasy Sellers in the San Francisco Bay Area

2004 ◽  
Author(s):  
Sheigla Murphy ◽  
Paloma Sales ◽  
Micheline Duterte ◽  
Camille Jacinto
Keyword(s):  
Qualitative Study ◽  
San Francisco ◽  
San Francisco Bay ◽  
San Francisco Bay Area ◽  
Bay Area
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