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Mercury flow through an Asian rice-based food web
Abeysinghe, Kasun S.; Qiu, Guangle; Goodale, Eben; Anderson, Christopher W. N.; Bishop, Kevin; Evers, David C.; Goodale, Morgan W.; Hintelmann, Holger; Liu, Shengjie; Mammides, Christos; Quan, Rui-Chang; Wang, Jin; Wu, Pianpian; Xu, Xiao-Hang; Yang, Xiao-Doug; Feng, Xinbin
2017
Source PublicationENVIRONMENTAL POLLUTION
Volume229Issue:xPages:219-228
AbstractMercury (Hg) is a globally-distributed pollutant, toxic to humans and animals. Emissions are particularly high in Asia, and the source of exposure for humans there may also be different from other regions, including rice as well as fish consumption, particularly in contaminated areas. Yet the threats Asian wildlife face in rice-based ecosystems are as yet unclear. We sought to understand how Hg flows through rice-based food webs in historic mining and non-mining regions of Guizhou, China. We measured total Hg (THg) and methylmercury (MeHg) in soil, rice, 38 animal species (27 for MeHg) spanning multiple trophic levels, and examined the relationship between stable isotopes and Hg concentrations. Our results confirm biomagnification of THg/MeHg, with a high trophic magnification slope. Invertivorous songbirds had concentrations of THg in their feathers that were 15x and 3x the concentration reported to significantly impair reproduction, at mining and non-mining sites, respectively. High concentrations in specialist rice consumers and in granivorous birds, the later as high as in piscivorous birds,, suggest rice is a primary source of exposure. Spiders had the highest THg concentrations among invertebrates and may represent a vector through which Hg is passed to vertebrates, especially songbirds. Our findings suggest there could be significant population level health effects and consequent biodiversity loss in sensitive ecosystems, like agricultural wetlands, across Asia, and invertivorous songbirds would be good subjects for further studies investigating this possibility. (C) 2017 Elsevier Ltd. All rights reserved.
Department其他
Language英语
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/10575
Collection土壤生态组
Recommended Citation
GB/T 7714
Abeysinghe, Kasun S.,Qiu, Guangle,Goodale, Eben,et al. Mercury flow through an Asian rice-based food web[J]. ENVIRONMENTAL POLLUTION,2017,229(x):219-228.
APA Abeysinghe, Kasun S..,Qiu, Guangle.,Goodale, Eben.,Anderson, Christopher W. N..,Bishop, Kevin.,...&Feng, Xinbin.(2017).Mercury flow through an Asian rice-based food web.ENVIRONMENTAL POLLUTION,229(x),219-228.
MLA Abeysinghe, Kasun S.,et al."Mercury flow through an Asian rice-based food web".ENVIRONMENTAL POLLUTION 229.x(2017):219-228.
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