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Factors that affect the degradation of naphthenic acids in oil sands wastewater by indigenous microbial communities
The acute toxicity of wastewater generated during the extraction of bitumen from oil sands is believed to be due to naphthenic acids (NAs). To determine the factors that affect the rate ofExpand
Assessing trace-metal exposure to american dippers in mountain streams of southwestern British Columbia, Canada.
Mass balance models used to predict daily metal exposure for dippers with different diets and breeding locations within a watershed showed that variation in metal levels primarily was attributed to differences in the proportion of fish and invertebrates in the diet of residents and migrants. Expand
Linking the sediment geochemistry of an intertidal region to metal bioavailability in the deposit feeder Macoma balthica
Metal levels in the tissue and shell of M. balthica were best related to the concentration of metal associated with the ER Mn component of sediment, and the partitioning of trace metals among the 3 fractions was highly site-specific. Expand
Heavy Metal Levels in Suspended Sediments, Crassostrea gigas, and the Risk to Humans
The results indicate that the current Canadian Cd consumption guidelines do not protect individuals consuming the maximum recommended levels of wild oysters, and that RSS sediments are not a significant source of metal to the oysters. Expand
Contrasting the community structure and select geochemical characteristics of three intertidal regions in relation to shellfish farming
Little is known about the impacts of intensive shellfish farming on intertidal ecosystems. To assess such impacts, several indices of ecosystem structure and select geochemical characteristics wereExpand
Amphibians as indicators of wetland quality in wetlands formed from oil sands effluent
Fort McMurray, Alberta, Canada, is home to the largest oil sands mining operation in the world. Two of the companies currently mining the oil sands hope to use wetlands formed from oil sands effluentExpand
Linking contaminant profiles to the diet and breeding location of American dippers using stable isotopes
It is concluded that dipper eggs represent local conditions at the breeding site, making them useful tools for biomonitoring aquatic contaminants in watersheds, and emphasize the importance of understanding individual species’ ecology for assessing toxicological effects at the population level. Expand
The primary objectives of this study were to evaluate the ecological characteristics of wetland ecosystems that had developed in response to oil sands effluent relative to reference wetlandExpand
Effects of oil sands effluent on cattail and clover: photosynthesis and the level of stress proteins.
The data indicate that cattail and clover are adapted to the oil sands effluent, although further studies are needed to assess their long-term ability to survive in the presence of this anthropogenic stress. Expand
The structure of the manganese oxide on the sheath of the bacterium Leptothrix discophora: An XAFS study
Abstract In natural waters, manganese oxides (MnOx) are important in mediating the bioavailability of trace metals such as Ni, Cu, Zn, Cd, and Pb, as these metals readily adsorb to the MnOx surface.Expand