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Stable isotope (N, C, Hg) study of methylmercury sources and trophic transfer in the northern gulf of Mexico.
We combined N, C, and Hg stable isotope measurements to identify the most important factors that influence MeHg accumulation in fish from the northern Gulf of Mexico (nGOM), and to determine ifExpand
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Spatial heterogeneity of methane ebullition in a large tropical reservoir.
Tropical reservoirs have been identified as important methane (CH(4)) sources to the atmosphere, primarily through turbine and downstream degassing. However, the importance of ebullition (gasExpand
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Characterization of zinc, lead, and cadmium in mine waste: implications for transport, exposure, and bioavailability.
We characterized the lability and bioaccessibility of Zn, Pb, and Cd in size-fractionated mine waste at the Tar Creek Superfund Site (Oklahoma) to assess the potential for metal transport, exposure,Expand
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Mercury bioaccumulation and trophic transfer in sympatric snapper species from the Gulf of Mexico.
Consumption of marine fish is a major route of toxic methyl mercury (MeHg) exposure to ocean apex predators and human populations. Here we explore the influence of trophic structure on total mercuryExpand
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Impact of a large tropical reservoir on riverine transport of sediment, carbon, and nutrients to downstream wetlands
Large dams can have major ecological and biogeochemical impacts on downstream ecosystems such as wetlands and riparian habitats. We examined sediment removal and carbon (C), nitrogen (N), andExpand
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Sediment accumulation and carbon, nitrogen, and phosphorus deposition in the large tropical reservoir Lake Kariba (Zambia/Zimbabwe)
Large dams affect the aquatic continuum from land to ocean by accumulating particles and nutrients in their reservoirs. We examined sediment cores to quantify sediment, organic carbon (OC), nitrogenExpand
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Nitrate Controls on Iron and Arsenic in an Urban Lake
Aquatic ecosystems are often contaminated by multiple substances. Nitrate, a common aquatic pollutant, strongly influenced the cycling of arsenic (As) under anoxic conditions in urban Upper MysticExpand
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Fish Consumption and Mercury Exposure among Louisiana Recreational Anglers
BACKGROUND Methylmercury (MeHg) exposure assessments among average fish consumers in the United States may underestimate exposures among U.S. subpopulations with high intakes of regionally specificExpand
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Sources and fates of heavy metals in a mining-impacted stream: temporal variability and the role of iron oxides.
Heavy metal contamination of surface waters at mining sites often involves complex interactions of multiple sources and varying biogeochemical conditions. We compared surface and subsurface metalExpand
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External Nutrient Loads to San Francisco Bay
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