Research Topics
| Collin A Eagles-SmithSummaryAffiliation: U.S. Geological Survey Country: USA Publications
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Publications
Mercury demethylation in waterbird livers: dose-response thresholds and differences among speciesCollin A Eagles-Smith
Davis Field Station, Western Ecological Research Center, US Geological Survey, University of California, Davis, California 956161, USA
Environ Toxicol Chem 28:568-77. 2009..Further, we provide strong evidence for a threshold of approximately 8.5 microg/g dry weight of THg in the liver where demethylation is initiated...- Rapid changes in small fish mercury concentrations in estuarine wetlands: implications for wildlife risk and monitoring programsCollin A Eagles-Smith
U S Geological Survey, Western Ecological Research Center, Davis Field Station, One Shields Avenue, University of California, Davis, California 95616, USA
Environ Sci Technol 43:8658-64. 2009..These results illustrate the importance of short-term temporal variation in small fish Hg concentrations for both Hg monitoring programs and assessing wildlife risk... - Mercury bioaccumulation and risk to three waterbird foraging guilds is influenced by foraging ecology and breeding stageCollin A Eagles-Smith
U S Geological Survey, Western Ecological Research Center, Davis Field Station, One Shields Avenue, University of California, Davis, CA 95616, USA
Environ Pollut 157:1993-2002. 2009..Our results highlight the importance of habitat and exposure timing, in addition to trophic position, on waterbird Hg bioaccumulation and risk... - Mercury correlations among six tissues for four waterbird species breeding in San Francisco Bay, California, USACollin A Eagles-Smith
U S Geological Survey, Western Ecological Research Center, Davis Field Station, One Shields Avenue, University of California, Davis, California 95616, USA
Environ Toxicol Chem 27:2136-53. 2008..Finally, our results suggest that blood is an excellent, nonlethal predictor of Hg concentrations in internal tissues but that feathers are relatively poor indicators of Hg concentrations in internal tissues... 
Changes in fish diets and food web mercury bioaccumulation induced by an invasive planktivorous fishCollin A Eagles-Smith
Department of Wildlife, Fish and Conservation Biology, University of California, Davis, California 95616, USA
Ecol Appl 18:A213-26. 2008..These results indicate that even transient perturbations of the structure of freshwater food webs can result in significant alterations in the bioaccumulation of Hg and that food webs in lakes can be highly resilient...- Mercury trophic transfer in a eutrophic lake: the importance of habitat-specific foragingCollin A Eagles-Smith
Department of Wildlife, Fish and Conservation Biology, University of California, Davis, California 95616, USA
Ecol Appl 18:A196-212. 2008..These results illustrate the importance of foraging habitat to Hg bioaccumulation and indicate that pelagic carbon can strongly subsidize the basal energy sources of benthic organisms... - Spatiotemporal trends in fish mercury from a mine-dominated ecosystem: Clear Lake, CaliforniaThomas H Suchanek
Department of Wildlife, Fish and Conservation Biology, University of California, Davis, California 95616, USA
Ecol Appl 18:A177-95. 2008..These trends may be related to Hg or other lake-wide gradients such as distribution of submerged aquatic vegetation... - Mine-derived mercury: effects on lower trophic species in Clear Lake, CaliforniaThomas H Suchanek
Department of Wildlife, Fish and Conservation Biology, University of California, Davis, California 95616, USA
Ecol Appl 18:A158-76. 2008..In addition, site-specific criteria should be established using the observed relationship between MeHg and observed ecological responses... - Anthropogenic stressors and changes in the Clear Lake ecosystem as recorded in sediment coresPeter J Richerson
Department of Environmental Science and Policy, University of California, Davis, California 95616, USA
Ecol Appl 18:A257-83. 2008..Increases in sediment deposition from increased earthmoving in the basin and sulfate loading from the mine are the most likely explanations for the dramatic changes seen in the post-1927 sections of the cores... - Mercury concentrations and space use of pre-breeding American avocets and black-necked stilts in San Francisco BayJoshua T Ackerman
U S Geological Survey, Western Ecological Research Center, Davis Field Station, One Shields Avenue, University of California, Davis, CA 95616, USA
Sci Total Environ 384:452-66. 2007.... - Is Clear Lake methylmercury distribution decoupled from bulk mercury loading?Thomas H Suchanek
Department of Wildlife, Fish and Conservation Biology, University of California, Davis, California 95616, USA
Ecol Appl 18:A107-27. 2008..e., TotHg) is not directly proportional to the critical form of Hg that is being bioaccumulated (i.e., MeHg)... - Mercury in abiotic matrices of Clear Lake, California: human health and ecotoxicological implicationsThomas H Suchanek
Department of Wildlife, Fish and Conservation Biology, University of California, Davis, California 95616, USA
Ecol Appl 18:A128-57. 2008..However, based on unique physical and chemical characteristics of the Clear Lake environment, MeHg toxicity may be significantly less than anticipated from the large inorganic Hg loading... - Does mercury contamination reduce body condition of endangered California clapper rails?Joshua T Ackerman
U S Geological Survey, Western Ecological Research Center, Davis Field Station, University of California, Davis, CA 95616, USA
Environ Pollut 162:439-48. 2012..Our results indicate the potential for detrimental effects of mercury contamination on endangered California clapper rails in tidal marsh habitats... - Oxidative stress response of Forster's terns (Sterna forsteri) and Caspian terns (Hydroprogne caspia) to mercury and selenium bioaccumulation in liver, kidney, and brainDavid J Hoffman
U S Geological Survey, Patuxent Wildlife Research Center, Beltsville, Maryland, USA
Environ Toxicol Chem 30:920-9. 2011..Our results indicate that THg concentrations induced oxidative stress in terns, and suggest that histopathological, immunological, and behavioral effects may occur in terns as reported in other species... - Mercury residues and productivity in osprey and grebes from a mine-dominated ecosystemDaniel W Anderson
Department of Wildlife, Fish, and Conservation Biology, University of California, Davis, California 95616, USA
Ecol Appl 18:A227-38. 2008..The temporary declines observed in grebe and Osprey feather residues in the late 1990s, with coincidental improvements in reproductive performance, however, could not be attributed to remediation at the mine site... - Mercury contamination and effects on survival of American avocet and black-necked stilt chicks in San Francisco BayJoshua T Ackerman
U S Geological Survey, Western Ecological Research Center, Davis Field Station, University of California, One Shields Avenue, Davis, CA 95616, USA
Ecotoxicology 17:103-16. 2008.... - Invertebrate mercury bioaccumulation in permanent, seasonal, and flooded rice wetlands within California's Central ValleyJoshua T Ackerman
U S Geological Survey, Western Ecological Research Center, Davis Field Station, One Shields Avenue, University of California, Davis, CA 95616, USA
Sci Total Environ 408:666-71. 2010.... - Mercury concentrations in blood and feathers of prebreeding Forster's terns in relation to space use of San Francisco Bay, California, USA, habitatsJoshua T Ackerman
US Geological Survey, Western Ecological Research Center, Davis Field Station, One Shields Avenue, University of California, Davis, California 95616, USA
Environ Toxicol Chem 27:897-908. 2008..These data illustrate the importance of space use and tissue type in interpreting mercury concentrations in birds... - Embryo malposition as a potential mechanism for mercury-induced hatching failure in bird eggsGarth Herring
U S Geological Survey, Davis Field Station, University of California, Davis, One Shields Avenue, Davis, California 95616, USA
Environ Toxicol Chem 29:1788-94. 2010..We hypothesize that malpositioning of avian embryos may be one reason for mercury-related hatching failure that occurs late in incubation, but further research is needed to elucidate this potential mechanism... - Selenium bioaccumulation and body condition in shorebirds and terns breeding in San Francisco Bay, California, USAJoshua T Ackerman
U S Geological Survey, Western Ecological Research Center, Davis Field Station, One Shields Avenue, University of California, Davis, California 95616, USA
Environ Toxicol Chem 28:2134-41. 2009..These variable results illustrate the complexity of Se bioaccumulation and highlight the need to sample multiple species and examine several factors to assess the impact of Se on wildlife... - Survival of postfledging Forster's terns in relation to mercury exposure in San Francisco BayJoshua T Ackerman
U S Geological Survey, Western Ecological Research Center, Davis Field Station, University of California, One Shields Avenue, Davis, CA 95616, USA
Ecotoxicology 17:789-801. 2008..Our results indicate that colony site, hatching date, and age influenced mercury concentrations in fledgling Forster's terns, but that mercury did not influence postfledging survival... - Organochlorine and PBDE concentrations in relation to cytochrome P450 activity in livers of Forster's terns (Sterna forsteri) and Caspian terns (Hydroprogne caspia), in San Francisco Bay, CaliforniaGarth Herring
US Geological Survey, Davis Field Station, Western Ecological Research Center, University of California, One Shields Ave, Davis, CA 95616, USA
Arch Environ Contam Toxicol 58:863-73. 2010..P450 protein activity was higher in adult Forster's terns than Caspian terns, higher in Central South Bay than in Lower South Bay, and higher in adult Forster's terns than in chicks... - Bird mercury concentrations change rapidly as chicks age: toxicological risk is highest at hatching and fledgingJoshua T Ackerman
U S Geological Survey, Western Ecological Research Center, Davis Field Station, University of California Davis, Davis, California 95616, USA
Environ Sci Technol 45:5418-25. 2011.... - A nonlethal microsampling technique to monitor the effects of mercury on wild bird eggsKatherine R Stebbins
Patuxent Wildlife Research Center, US Geological Survey, BARC East, Beltsville, Maryland 20705, USA
Environ Toxicol Chem 28:465-70. 2009.... - Integrating toxicity risk in bird eggs and chicks: using chick down feathers to estimate mercury concentrations in eggsJoshua T Ackerman
U S Geological Survey, Western Ecological Research Center, Davis Field Station, One Shields Avenue, University of California, Davis, California 95616, USA
Environ Sci Technol 43:2166-72. 2009.... - The legacy of mercury cycling from mining sources in an aquatic ecosystem: from ore to organismThomas H Suchanek
Department of Wildlife, Fish and Conservation Biology, University of California, Davis, California 95616, USA
Ecol Appl 18:A12-28. 2008..Based on our data, together with state and federal water and sediment quality criteria, we predict potential resulting environmental and human health effects and provide data that can assist remediation efforts... - Agricultural wetlands as potential hotspots for mercury bioaccumulation: experimental evidence using caged fishJoshua T Ackerman
U S Geological Survey, Western Ecological Research Center, Davis Field Station, University of California, Davis, California 95616, USA
Environ Sci Technol 44:1451-7. 2010..Our results indicate that shallowly flooded rice fields are potential hotspots for MeHg bioaccumulation and, due to their global prevalence, suggest that agricultural wetlands may be important contributors to MeHg contamination...