کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4424535 1619196 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modelling mercury concentrations in prey fish: Derivation of a national-scale common indicator of dietary mercury exposure for piscivorous fish and wildlife
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Modelling mercury concentrations in prey fish: Derivation of a national-scale common indicator of dietary mercury exposure for piscivorous fish and wildlife
چکیده انگلیسی

The National Descriptive Model for Mercury in Fish (NDMMF) was applied to a Canada – wide dataset of fish mercury (Hg) concentrations to derive a common indicator of dietary methylmercury (MeHg) exposure (HgPREY) to piscivorous fish and wildlife. The NDMMF provided unbiased parameter estimates and strong spatial biases in prediction error were not apparent. Prediction error was comparatively higher when sample sizes were small and events with high Hg concentrations. Estimates of HgPREY from 1936 locations between 1990 and 2010 averaged 0.09 ± 0.07 μg g−1 (wet wt) and increased from west to east in a manner consistent with independent measures of MeHg exposure in piscivorous wildlife and conceptual models of aquatic ecosystem sensitivity to Hg methylation and bioaccumulation. The HgPREY dataset offers an approach to evaluate the risk of MeHg exposure to piscivorous fish and wildlife on a continental scale.


► We model Hg concentrations in fish from across Canada to derive a common indicator for risk assessment.
► Hg in prey fish increases from west to east across Canada.
► Modelling approach provides a national scale indicator of dietary Hg exposure to piscivorous fish and wildlife.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 176, May 2013, Pages 234–243
نویسندگان
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