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题名: Trophodynamics of Organic Pollutants in Pelagic and Benthic Food Webs of Lake Dianchi: Importance of Ingested Sediment As Uptake Route
作者: Fan, Senrong1; Wang, Beili1; Liu, Hang1; Gao, Shixiong1; Li, Tong1; Wang, Shuran3; Liu, Yong2; Liu, Xueqin3; Wan, Yi1
刊名: ENVIRONMENTAL SCIENCE & TECHNOLOGY
发表日期: 2017-12-19
DOI: 10.1021/acs.est.7b03681
卷: 51, 期:24, 页:14135-14143
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Technology ; Life Sciences & Biomedicine
类目[WOS]: Engineering, Environmental ; Environmental Sciences
研究领域[WOS]: Engineering ; Environmental Sciences & Ecology
英文摘要: Habitat is of great importance in, determining the trophic transfer of pollutants in freshwater ecosystems; however, the major factors influencing chemical trophodynamics in pelagic and benthic food webs remain unclear. This study investigated the levels of p,p'-dichlorodiphenyldichloroethylene (p,p'-DDE), polycyclic aromatic hydrocarbons (PAHs), 3 and substituted PAHs (s-PAHs) in 2 plankton species, 6 invertebrate species, and 10 fish species collected from Lake Dianchi in southern China. Relatively high concentrations of PAHs and s-PAHs were detected with total concentrations of 11.4-1400 ng/g wet weight (ww) and 5.3-115 ng/g ww, respectively. Stable isotope analysis and stomach content analysis were applied to quantitatively determine the trophic level of individual organisms and discriminate between pelagic and benthic pathways, and the trophodynamics of the detected compounds in the two food webs were assessed. P,p'-DDE was found to exhibit relatively higher trophic magnification rate in the pelagic food web than in the benthic food web. In contrast, PAHs and s-PAHs exhibited greater dilution rates along the trophic levels in the pelagic food web. The lower species differences of pollutants accumulated in benthic organisms compared to pelagic organisms is attributable to extra uptake via ingested sediment in benthos. The average uptake proportions of PAHs and s-PAHs via ingested sediment in benthic biotas were estimated to be 31-77%, and that of p,p'-DDE was 46%. The uptake routes are of importance for assessing the trophic magnification potentials of organic pollutants, especially in eutrophic freshwater ecosystems.
关键词[WOS]: POLYCYCLIC AROMATIC-HYDROCARBONS ; STABLE-ISOTOPE ANALYSIS ; FRESH-WATER ; ORGANOCHLORINE PESTICIDES ; RELATIVE IMPORTANCE ; FEEDING-BEHAVIOR ; MOUNTAIN LAKE ; NORTH CHINA ; PORE-WATER ; BALTIC SEA
语种: 英语
项目资助者: National Basic Research Program of China(2015CB458900) ; National Natural Science Foundation of China(21422701 ; 201677003)
WOS记录号: WOS:000418625900015
ISSN号: 0013-936X
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/43675
Appears in Collections:淡水生态学研究中心_期刊论文

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作者单位: 1.Peking Univ, Lab Earth Surface Proc, Coll Urban & Environm Sci, Beijing 100871, Peoples R China
2.Peking Univ, Key Lab Water & Sediment Sci, Minist Educ, Coll Environm Sci & Engn, Beijing 100871, Peoples R China
3.Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Hubei, Peoples R China
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