Results 131 to 140 of about 2,529 (177)

Patterns of Interploidy Admixture in Polyploid Complexes: Insights From Thymus Sect. Mastichina (Lamiaceae). [PDF]

Mol Ecol
García-Cárdenas FJ, Ortiz MÁ, Del Valle JC, Doblas-Pruvost D, de la Estrella M, Nieto-Lugilde D, Pokorny L, Berjano R.   +7 more
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Biological effects of anthropogenic contaminants in the San Francisco Estuary

Environmental Research, 2007
Concentrations of many anthropogenic contaminants in the San Francisco Estuary exist at levels that have been associated with biological effects elsewhere, so there is a potential for them to cause biological effects in the Estuary. The purpose of this paper is to summarize information about biological effects on the Estuary's plankton, benthos, fish ...
James S Kuwabara
exaly   +3 more sources

Decadal mercury trends in San Francisco Estuary sediments

Environmental Research, 2007
Monitoring sediment quality and total mercury concentrations over the period 1993-2001 at 26 stations in San Francisco Estuary has shown the seasonal cycling of mercury sediment concentrations, as well as a significant (P < 0.05) decrease in those concentrations at eight stations across the estuary.
Christopher H Conaway, Robert P Mason
exaly   +3 more sources

Mercury speciation in the San Francisco Bay estuary

Marine Chemistry, 2003
In order to understand the biogeochemistry of mercury in the San Francisco Bay estuary, California, we undertook a 2-year study of sediments and surface waters to investigate sources of mercury to the estuary and the processes that control its distribution. Over several seasons, unfiltered and filtered (
Christopher H Conaway, Robert P Mason
exaly   +2 more sources

Mercury in the San Francisco Estuary

2008
This review presents some of the published and other important literature on mercury contamination in San Francisco Estuary. Studies on human consumption of contaminated sportfish and on detecting ecological impacts of this contamination in wetland areas validate concerns regarding mercury's toxicity in this system.
Christopher H, Conaway, Frank J, Black, Thomas M, Grieb, Sujoy, Roy, A Russell, Flegal   +4 more
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Patterns and trends in sediment toxicity in the San Francisco Estuary

Environmental Research, 2007
Widespread sediment toxicity has been documented throughout the San Francisco Estuary since the mid-1980s. Studies conducted in the early 1990s as part of the Bay Protection and Toxic Cleanup Program (BPTCP), and more recently as part of the Regional Monitoring Program (RMP) have continued to find sediment toxicity in the Estuary.
Brian, Anderson, John, Hunt, Bryn, Phillips, Bruce, Thompson, Sarah, Lowe, Karen, Taberski, R, Scott Carr   +6 more
openaire   +2 more sources

Surveillance for previously unmonitored organic contaminants in the San Francisco Estuary

Marine Pollution Bulletin, 2003
The San Francisco Estuary Regional Monitoring Program initiated surveillance monitoring to identify previously unmonitored synthetic organic contaminants in the San Francisco Estuary. Organic extracts of water samples were analyzed using gas chromatography-mass spectrometry in full scan mode. The major contaminant classes identified in the samples were
Daniel R, Oros, Walter M, Jarman, Theresa, Lowe, Nicole, David, Sarah, Lowe, Jay A, Davis   +5 more
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Denitrifier abundance and activity across the San Francisco Bay estuary

Environmental Microbiology Reports, 2010
Summary Over 50% of external dissolved inorganic nitrogen inputs to estuaries are removed by denitrification – the microbial conversion of nitrate to nitrogen gas under anaerobic conditions. In this study, denitrifier abundance, potential rates and community structure were examined in sediments from the San ...
Annika C, Mosier, Christopher A, Francis
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Benthic macrofaunal assemblages of the San Francisco Estuary and Delta, USA

Environmental Monitoring and Assessment, 2012
The spatial and temporal distribution of macrobenthic assemblages in the San Francisco Estuary and Sacramento-San Joaquin River Delta were identified using hierarchical cluster analysis of 501 samples collected between 1994 and 2008. Five benthic assemblages were identified that were distributed primarily along the salinity gradient: (1) a polyhaline ...
Bruce, Thompson, J Ananda, Ranasinghe, Sarah, Lowe, Aroon, Melwani, Stephen B, Weisberg   +4 more
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Environmental activism in the San Francisco Bay Estuary

Marine Pollution Bulletin, 1991
Abstract This paper presents a brief description of the San Francisco Bay Estuary and its modifications. Problems associated with habitat loss and degradation, pollutants, freshwater diversion, and dredging are described. The activities of environmental groups addressing these problems, including several examples, are noted.
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