Bioaccumulation of heavy metals both in wild and mariculture food chains in Daya Bay, South China
Qiu, Yao-Wen; yqiu@scsio.ac.cn
2015
发表期刊ESTUARINE COASTAL AND SHELF SCIENCE
卷号163期号:B页码:7-14
摘要Bioaccumulation and trophic transfer of heavy metals both in the natural marine ecosystem (seawater, sediment, coral reef, phytoplankton, macrophyte, shrimp, crab, shellfish, planktivorous and carnivorous fish) and in the mariculture ecosystem (compound feed, trash fish, farmed pompano and snapper) were studied at Daya Bay, a typical subtropical bay in Southern China. The levels of Cu, Zn, Pb and Cd in sediment were 11.7, 10.2, 53.8 and 2.8 times than those in coral reef, respectively. Pb and Zn levels were markedly higher in phytoplankton than in macrophyte, probably caused by the larger specific surface area in phytoplankton. The highest levels of Zn (98.1), Pb (1.87) and Cd (5.11 mu g g(-1) dw) in wild organisms were all found in clam (Veremolpa scabra), indicating that these metals were apt to bioaccumulate in shellfish. The average concentrations of Cu, Zn, Pb and Cd in wild fish were 3.7, 2.1, 0.4 and 22.2 times than those in farmed fish, confirming the "growth dilution" hypothesis in farmed fish. Heavy metal bioconcentration factors (BCFs) in algae, bioaccumulation factors (BAFs) in wild species and transfer factors (TFs) in organism were calculated and discussed. The results suggested that biologically essential Cu and Zn were easier to accumulate in fish than non-essential Cd. Concentrations of Cu, Zn and Cd were several times higher in wild fish than in farmed fish whereas the opposite was observed for Pb. This metal also showed the highest transfer factor from food, which means that special attention must be given to fish feed production in relation to metal contamination. (C) 2015 Elsevier Ltd. All rights reserved.
部门归属LMB
关键词Heavy Metal Bioaccumulation Algae Fish Fish Feed Food Webs
学科领域Marine & Freshwater Biology ; Oceanography
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文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/14770
专题中科院海洋生物资源可持续利用重点实验室
通讯作者yqiu@scsio.ac.cn
作者单位Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Guangdong, Peoples R China
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GB/T 7714
Qiu, Yao-Wen,yqiu@scsio.ac.cn. Bioaccumulation of heavy metals both in wild and mariculture food chains in Daya Bay, South China[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2015,163(B):7-14.
APA Qiu, Yao-Wen,&yqiu@scsio.ac.cn.(2015).Bioaccumulation of heavy metals both in wild and mariculture food chains in Daya Bay, South China.ESTUARINE COASTAL AND SHELF SCIENCE,163(B),7-14.
MLA Qiu, Yao-Wen,et al."Bioaccumulation of heavy metals both in wild and mariculture food chains in Daya Bay, South China".ESTUARINE COASTAL AND SHELF SCIENCE 163.B(2015):7-14.
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