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Filter Total Items: 612
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Year Published: 2003

Clams as CO2 generators: The Potamocorbula amurensis example in San Francisco Bay

Respiration and calcium carbonate production by the invasive Asian clam, Potamocorbula amurensis, were calculated to assess their importance as CO2 sources in northern San Francisco Bay. Production, calculated using monthly population density and size structure measured at three sites over 7 yr and a shell length/CaCO3 conversion factor, averaged...

Chauvaud, Laurent; Thompson, Janet K.; Cloern, James E.; Thouzeau, Gerard
Attribution: Pacific

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Year Published: 2003

Climate science issues and needs of the CALFED Bay-Delta Program

No abstract available.

Dettinger, M.D.; Bennett, W.A.; Cayan, D.R.; Florsheim, J.; Hughes, M.; Ingram, B.L.; Jassby, A.D.; Knowles, N.; Malamud, F.; Peterson, D.H.; Redmond, K.; Smith, L.
Attribution: Pacific

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Year Published: 2003

Continuous monitoring of suspended sediment discharge in rivers by use of optical backscatterance sensors

No abstract available.

Schoellhamer, D.H.; Wright, S.A.
Attribution: Pacific

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Year Published: 2003

Cross-channel variability in benthic habitat

Benthic invertebrates play an important role in estuarine food webs and biogeochemical cycling of carbon, nutrients, and contaminants. The generally sedentary benthic invertebrates continuously integrate local water, sediment, and food conditions. This makes them good indicators of the type and quality of aquatic habitat at the location where they...

Vayssieres, Marc; Peterson, Heather
Attribution: Pacific

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Year Published: 2003

Desalinization, erosion, and tidal changes following the breaching of Napa salt pond 3

No abstract available.

Swanson, K. M.; Shellenbarger, G.G.; Schoellhamer, D.H.; Ganju, N.K.; Athearn, N.D.; Buchanan, P.A.
Attribution: Pacific

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Year Published: 2003

Effects of spatial and temporal variability of turbidity on phytoplankton blooms

A central challenge of coastal ecology is sorting out the interacting spatial and temporal components of environmental variability that combine to drive changes in phytoplankton biomass. For 2 decades, we have combined sustained observation and experimentation in South San Francisco Bay (SSFB) with numerical modeling analyses to search for general...

May, Christine L.; Koseff, Jeffrey R.; Lucas, Lisa; Cloern, James E.; Schoellhamer, David H.

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Year Published: 2003

Lessons from monitoring water quality in San Francisco Bay

San Francisco Bay is the defining landscape feature of the place we call ‘The Bay Area,’ but most of us only experience the Bay as we view it from an airplane window or drive across one of its bridges. These views from afar suggest that the Bay is static and sterile, but this impression is deceptive. If you are one of the many...

Cloern, J.E.; Schraga, T.S.; Lopez, C.B.; Labiosa, R.

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Year Published: 2003

Microbial cycling of mercury in contaminated pelagic and wetland sediments of San Pablo Bay, California

San Pablo Bay is an estuary, within northern San Francisco Bay, containing elevated sediment mercury (Hg) levels because of historic loading of hydraulic mining debris during the California gold-rush of the late 1800s. A preliminary investigation of benthic microbial Hg cycling was conducted in surface sediment (0–4 cm) collected from one...

Marvin-DiPasquale, M. C.; Agee, J.L.; Bouse, R.M.; Jaffe, B.E.
Microbial cycling of mercury in contaminated pelagic and wetland sediments of San Pablo Bay, California; 2003; Conference Paper; Environmental Geology; Marvin-DiPasquale, M. C.; Agee, J. L.; Bouse, R. M.; Jaffe, B. E.

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Year Published: 2003

Seasonal and longitudinal homogeneity of suspended sediment in San Francisco Bay, California

No abstract available.

Schoellhamer, D.H.; Ganju, N.K.; Gartner, J.W.; Murrell, M.C.; Wright, S.A.
Attribution: Pacific

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Year Published: 2003

Sediment dynamics drive contaminant dynamics

Many contaminants of greatest concern in San Francisco Bay, including mercury and PCBs, are primarily associated with sediment particles rather than dissolved in water. Therefore, the movement and fate of sediment determines the movement and fate of many contaminants in the Bay. Because of this close association, the RMP monitors and seeks to...

Schoellhamer, David H.; Shellenbarger, Gregory; Ganju, Neil K.; Davis, Jay A.; McKee, Lester J.
Attribution: Pacific

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Year Published: 2003

Specific-conductance, water-temperature, and water-level data, San Francisco Bay, California, for water years 2001-2002

This article presents time-series plots of specific-conductance, water-temperature, and water-level data collected in San Francisco Bay during water years 2001 and 2002 (October 1, 2000, through September 30, 2002). Specific-conductance and water-temperature data were recorded at 15-minute intervals at the following US Geological Survey (USGS)...

Buchanan, P.A.
Attribution: Pacific

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Year Published: 2003

Structure and mechanics of the Hayward-Rodgers Creek Fault step-over, San Francisco Bay, California

A dilatational step-over between the right-lateral Hayward and Rodgers Creek faults lies beneath San Pablo Bay in the San Francisco Bay area. A key seismic hazard issue is whether an earthquake on one of the faults could rupture through the step-over, enhancing its maximum possible magnitude. If ruptures are terminated at the step-over, then...

Parsons, T.; Sliter, R.; Geist, E.L.; Jachens, R.C.; Jaffe, B.E.; Foxgrover, A.; Hart, P.E.; McCarthy, J.
Structure and mechanics of the Hayward-Rodgers Creek Fault step-over, San Francisco Bay, California; 2003; Article; Journal; Bulletin of the Seismological Society of America; Parsons, T.; Sliter, R.; Geist, E. L.; Jachens, R. C.; Jaffe, B. E.; Foxgrover, A.; Hart, P. E.; McCarthy, J.

Filter Total Items: 223
Image: White-faced Ibis
July 2, 2009

White-faced Ibis

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: California Brown Pelicans
June 11, 2009

California Brown Pelicans

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: American Avocet Attack
June 11, 2009

American Avocet Attack

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: California Brown Pelicans
June 11, 2009

California Brown Pelicans

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: California Brown Pelicans
June 11, 2009

California Brown Pelicans

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: An American Avocet and Black Skimmer
June 11, 2009

An American Avocet and Black Skimmer

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: Gull-billed Tern
June 11, 2009

Gull-billed Tern

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: Gull-billed Tern
June 11, 2009

Gull-billed Tern

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: Snowy Egret, Great Blue Heron and Brown Pelican
June 11, 2009

Snowy Egret, Great Blue Heron and Brown Pelican at the Salton Sea

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: California Brown Pelican
June 11, 2009

California Brown Pelican

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: American Avocet
April 26, 2009

American Avocet

Birds found in and around the Salton Sea, California.

Attribution: Pacific
Image: American Avocet
April 21, 2009

American Avocet

Birds found in and around the Salton Sea, California.

Attribution: Pacific

Nine USGS Science Centers are administered by the Pacific Regional office, which is headquartered in Sacramento, California.