Mercury in San Francisco Bay forage fish

Greenfield, B. K.; Jahn, Andrew E.

doi:10.1016/j.envpol.2010.04.010

Cited by 44 publications

(60 citation statements)

References 30 publications

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“…No fish sampled from the open bay habitats exceeded the 0.30 µg/g ww wildlife criterion and only 9 percent exceeded the fish health threshold in the open bay habitat (Eagles-Smith and Ackerman, 2014). In particular, 36 percent of silversides exceeded the wildlife risk benchmark in managed wetlands, whereas no silversides sampled from the open bay habitat exceeded the benchmark in this study (Eagles-Smith and Ackerman, 2014), nor was the benchmark exceeded in open bay habitats in prior studies in San Francisco Bay (Greenfield and Jahn, 2010). Thus, the wetland habitats along the bay's margins not only had the prey fish with the highest mercury concentrations (Eagles-Smith and Ackerman, 2014), but these wetland habitats also are the preferred foraging and breeding areas for piscivorous birds in the estuary (Ackerman and others, 2008a; Bluso-Demers and others, unpublished data).…”

Section: P E R C E N T a G E O F P R E Y F I S H E X C E E D I N G D mentioning

confidence: 60%

Mercury in birds of San Francisco Bay-Delta, California: trophic pathways, bioaccumulation, and ecotoxicological risk to avian reproduction

Ackerman¹,

Eagles‐Smith²,

Heinz³

et al. 2014

Open-File Report

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For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment-visit http://www.usgs.gov or call 1-888-ASK-USGS For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprodTo order this and other USGS information products, visit http://store.usgs.gov Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.Suggested citation: Ackerman, J.T., Eagles-Smith, C.A., Heinz, G.H., De La Cruz, S.E., Takekawa, J.Y., Miles, A.K., Adelsbach, T.L., Herzog, M.P., Bluso-Demers, J.D., Demers, S.A., Herring, G., Hoffman, D.J., Hartman, C.A., Willacker, J.J., Suchanek, T.H., Schwarzbach, S.E., and Maurer, T.C., 2014, Mercury in birds of San Francisco Bay-Delta, California-Trophic pathways, bioaccumulation, and ecotoxicological risk to avian reproduction: U.S. Geological Survey Open-File Report 2014-1251, 202 p., http://dx.doi.org/10.3133/ofr20141251. Relations between log whole blood total mercury (THg) concentrations (µg/g ww) and whole blood stable isotope ratios of carbon (δ 13 C), nitrogen (δ 15 N), and sulfur (δ 34 S) in pre-breeding (green symbols) and breeding ( Relations between log whole blood total mercury (THg) concentrations (µg/g ww) and whole blood table isotope ratios of carbon (δ 13 C), nitrogen Correlation between single-species in mean fish total mercury (THg) concentrations (µg/g dw; ± SE), and corresponding Forster's tern THg concentrations in pre-breeding blood (µg/g ww; ± SE), breeding blood (µg/g ww; ± SE), and eggs (µg/g fww; ± SE) sampled from the same wetland location where fish were sampled .. Leverage plots for the relationship between total mercury (THg) concentrations (mg/g dry weight) and a suite of biomarkers in brains of prebreeding Forster's tern and Caspian tern adults (closed circles and closed triangles, respectively), breeding adult Forster's terns (semi-closed circles), and Tables Table 1. Population range sizes and percentage use of habitat types within 50 and 95 percent utilization distributions (UD) of pre-breeding American avocets and black-necked stilts radio-marked at each site during spring 2005 and 2006 Table 9.Mean percent number ( Table 16. Esophageal contents expressed as aggregate percent dry mass for surf scoters collected during 2003-2004 (2004) and 2004-2005 (2005) Table 17. Sample size, geometric means (µg/g dw), ± standard error and 95 percent CI for hepatic selenium (Se) and total mercury (THg), and renal cadmium (Cd) in female surf scoters only collected during fall (F), winter (W), spring (S) 2003-04 (2004) and 2004-05 (2005) Executive SummarySan Francisco Bay Estuary in northern California has a legacy of mercury ...

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Section: P E R C E N T a G E O F P R E Y F I S H E X C E E D I N G D mentioning

confidence: 60%

Mercury in birds of San Francisco Bay-Delta, California: trophic pathways, bioaccumulation, and ecotoxicological risk to avian reproduction

Ackerman¹,

Eagles‐Smith²,

Heinz³

et al. 2014

Open-File Report

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“…1 A and B). Since that time, sediment-bound Hg has contaminated fish and waterfowl of the San Francisco Bay-Delta (SFBD) (13,14). However, the dominant modern geographical sources of Hg, as well as the processes, patterns, and time scale of its delivery to this downstream ecosystem, are debated (15)(16)(17), partly due to the lack of a generic understanding of postmining fan evolution.…”

mentioning

confidence: 99%

Enduring legacy of a toxic fan via episodic redistribution of California gold mining debris

Singer

Aalto

James

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

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Significance This paper is of fundamental interest to the millions of residents living at the downstream end of this and other global river basins beset by industrial metals mining. Sediment-bound Hg has contaminated food webs of the San Francisco Bay-Delta, but the dominant geographical sources of Hg to downstream ecosystems in this and similar river basins are debated. Likewise, the processes by which Hg is delivered to lowlands and the patterns of its floodplain deposition are poorly understood. This research addresses a gap in generic theory of postmining fan evolution that enables anticipation, prediction, and management of contamination risk to food webs.

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“…In situ production and accumulation of MeHg in tidal marshes place biota that utilize tidal marshes at risk to MeHg exposure (Eagles-Smith et al 2009;Greenfield and Jahn 2010). However, there is little quantitative information on the magnitude of inorganic Hg and MeHg fluxes from tidal marshes, or even whether they serve as sources or sinks of inorganic Hg and MeHg to coastal waters.…”

Section: Introductionmentioning

confidence: 99%

Tidal exchange of total mercury and methylmercury between a salt marsh and a Chesapeake Bay sub-estuary

et al. 2012

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We examined the net exchange of total mercury (THg) and methylmercury (MeHg) between a tidal marsh and its adjacent estuary over a 1-year period from August 2007 to July 2008. Our objectives were to estimate the importance of tidal salt marshes as sources and sinks of mercury within the Chesapeake Bay system, and to examine the hydrologic and biogeochemical controls on mercury fate and transport in tidal marshes. Tidal flows and water chemistry were measured at an established tidal flume at the mouth of the principal tidal creek of a 3-ha marsh section at the Smithsonian Environmental Research Center. Fluxes were estimated by combining continuous tidal flow measurement for the entire study year, with discrete, hourly, flow-weighted measurements of filterable and particulate THg and MeHg, dissolved organic carbon (DOC), and suspended particulate matter (SPM) made over 20 tidal cycles during the year. We found that the marsh was a relatively small net tidal source of MeHg, mainly during the warmer growing season. We also confirmed that the marsh was a substantial source of DOC to the adjacent estuary. DOC was a significant predictor of both filterable THg and MeHg fluxes. However, although the marsh was a source of filterable THg, it was overall a net sink for THg because of particulate trapping. The net per-area annual flux of MeHg from tidal marshes is greater than other MeHg pathways within Chesapeake Bay. The annual load of MeHg from tidal marshes into Chesapeake Bay, however, is likely small relative to fluvial fluxes and efflux from bottom sediment. This study suggests that MeHg production within the tidal marsh has greater consequences for biota inhabiting the marsh than for the efflux of MeHg from the marsh.

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Mercury in San Francisco Bay forage fish

Cited by 44 publications

References 30 publications

Mercury in birds of San Francisco Bay-Delta, California: trophic pathways, bioaccumulation, and ecotoxicological risk to avian reproduction

Mercury in birds of San Francisco Bay-Delta, California: trophic pathways, bioaccumulation, and ecotoxicological risk to avian reproduction

Enduring legacy of a toxic fan via episodic redistribution of California gold mining debris

Tidal exchange of total mercury and methylmercury between a salt marsh and a Chesapeake Bay sub-estuary

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