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Perfluorinated and polyfluorinated compounds in lake food webs from the Canadian high Arctic.
Per- and polyfluorinated alkyl substances (PFASs) enter Arctic lakes through long-range atmospheric transport and local contamination, but their behavior in aquatic food webs at high latitudes isExpand
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Factors affecting biotic mercury concentrations and biomagnification through lake food webs in the Canadian high Arctic.
In temperate regions of Canada, mercury (Hg) concentrations in biota and the magnitude of Hg biomagnification through food webs vary between neighboring lakes and are related to water chemistryExpand
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Optical Properties of Dissolved Organic Matter and Their Relation to Mercury Concentrations in Water and Biota Across a Remote Freshwater Drainage Basin.
Dissolved organic matter (DOM) includes an array of carbon-based compounds that vary in size and structure and have complex interactions with mercury (Hg) cycling in aquatic systems. While manyExpand
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Using sulfur stable isotopes to assess mercury bioaccumulation and biomagnification in temperate lake food webs.
Nitrogen and carbon stable isotopes (δ15 N, δ13 C) are commonly used to understand mercury (Hg) bioaccumulation and biomagnification in freshwater food webs. Though sulfur isotopes (δ34 S) canExpand
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Percentage of methylmercury in the muscle tissue of freshwater fish varies with body size and age and among species.
It is commonly assumed that most (>95%) of the mercury (Hg) found in fish muscle is the toxic form, methylmercury (MeHg), due to its efficient assimilation and retention in biotic tissue. However,Expand
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Mercury bioaccumulation in relation to changing physicochemical and ecological factors across a large and undisturbed boreal watershed
Within a drainage basin, the position of a lake or river can greatly affect its limnological and ecological characteristics. These properties influence the cycling of mercury (Hg), a neurotoxic and...
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Assessing the utility of sulfur isotope values for understanding mercury concentrations in water and biota from high Arctic lakes
Methylmercury (MeHg) biomagnifies through aquatic food webs resulting in elevated concentrations in fish globally. Stable carbon and nitrogen isotopes are frequently used to determine dietary sourcesExpand
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Mercury Bioaccumulation in Lacustrine Fish Populations Along a Climatic Gradient in Northern Ontario, Canada
Climate change is predicted to alter many processes in boreal aquatic ecosystems, including mercury (Hg) bioaccumulation in fish. We investigated current patterns in fish Hg across a climaticExpand
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A Comparison of Mercury Biomagnification through Lacustrine Food Webs Supporting Brook Trout (Salvelinus fontinalis) and Other Salmonid Fishes
Methyl mercury (MeHg) bioaccumulation in lower-trophic-level organisms and its subsequent biomagnification through food webs differs in magnitude among lakes and results in intraspecific variabilityExpand
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The trophic niche of sculpins Cottus spp. in forage fish assemblages of boreal lakes.
We compared the trophic niches of freshwater sculpins Cottus spp. with those of other co-habiting forage fishes in two groups of boreal lakes with distinct habitats and fish communities. Near NorthExpand