Basal mercury concentrations and biomagnification rates in freshwater and marine food webs: Effects on Arctic charr (Salvelinus alpinus) from eastern Canada

被引：61
|
作者：
van der Velden, S. [1 ]
Dempson, J. B. [2 ]
Evans, M. S. [3 ]
Muir, D. C. G. [4 ]
Power, M. [1 ]
机构：
[1] Univ Waterloo, Dept Biol, Waterloo, ON N2L 3G1, Canada
[2] Fisheries & Oceans Canada, St John, NF A1C 5X1, Canada
[3] Environm Canada, Saskatoon, SK S7N 3H5, Canada
[4] Environm Canada, Burlington, ON L7R 4A6, Canada
来源：
SCIENCE OF THE TOTAL ENVIRONMENT | 2013年 / 444卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
Arctic charr; Mercury; Methylmercury; Biomagnification; Lacustrine; Marine; PERSISTENT ORGANIC POLLUTANTS; TROUT SALMO-TRUTTA; STABLE-ISOTOPES; TROPHIC POSITION; TEMPORAL TRENDS; NORTHWATER POLYNYA; BIOLOGICAL FACTORS; INORGANIC MERCURY; LAKE HAZEN; METHYLMERCURY;
D O I：
10.1016/j.scitotenv.2012.11.099
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Patterns of total Hg (THg) and methyl Hg (MeHg) biomagnification were investigated in six pairs of co-located lacustrine and marine food webs supporting a common predator, Arctic charr. Mercury biomagnification rates (the slope of log Hg concentration versus delta N-15-inferred trophic level) did not differ significantly between the two feeding habitats for either THg or MeHg, but THg and MeHg concentrations at the base of the food web were higher in the lacustrine environment than in the marine environment. The proportion of THg as MeHg was related to trophic level, and the relationship was statistically similar in the lacustrine and marine habitats. The biomagnification rate of MeHg exceeded that of THg in both habitats. We conclude that the known difference in Hg concentration between anadromous and non-anadromous Arctic charr is driven by differential Hg concentrations at the base of the lacustrine and marine foodwebs, and not by differential biomagnification rates. (C) 2012 Elsevier B.V. All rights reserved.
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页码：531 / 542
页数：12
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