Mercury biomagnification in subtropical reservoir fishes of eastern China
作者： N. Roxanna Razavi , Mingzhi Qu , Binsong Jin , Wenwei Ren , Yuxiang Wang
DOI: 10.1007/S10646-013-1158-6
关键词: Biomagnification 、 Asian carp 、 Environmental chemistry 、 Food chain 、 Aquatic ecosystem 、 Food web 、 Bioaccumulation 、 Mercury (element) 、 Environmental science 、 Ecology 、 δ15N
摘要: Little is known about mercury (Hg) biomagnification in the subtropics, aquatic systems with high species diversity resulting complex food webs. High atmospheric Hg emissions and ubiquitous reservoir fisheries may lead to elevated bioaccumulation Chinese freshwater fishes. However, stocking practices using fast-growing can result low fish total (THg) concentrations. Here, we describe transfer within web of a large subtropical reservoir, Qiandao Hu (Xin’anjiang reservoir) situated eastern China. We measured THg concentrations 33 stocked wild Mercury most fishes were low, though also found top predators. The structure, assessed stable isotopes carbon (δ13C) nitrogen (δ15N), demonstrated degree omnivory long chain. highly correlated δ15N values. regression log10THg against revealed overall rate was low. This study shows that where chains exist reservoirs, accumulation predators occur despite rate.
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