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Heavy metal gradients from rural to urban lakes in central China
Xia,Wentong1,2; Wang,Rui1,2,3; Zhu,Bin4; Rudstam,Lars G.5; Liu,Yinglong1; Xu,Yanxue6; Xin,Wei1; Chen,Yushun1,2
Corresponding AuthorXu,Yanxue(xuyx@caep.org.cn) ; Chen,Yushun(yushunchen@ihb.ac.cn)
Source PublicationEcological Processes
AbstractAbstractBackgroundLimited information is available on heavy metal patterns in lakes under rapid watershed urbanization, especially considering a large spatial gradient with a long linear distance and great variations in topographic relief. To fill this gap, we studied concentrations of a series of heavy metals in both water and sediments from 20 lakes along a rural to urban gradient in central China, and we aimed to understand the effects of urban processes on heavy metal dynamics in lake ecosystems. Studied lakes were divided into five groups: A (rural reservoir group), B (rural commercial fishing group), C (urban park group), D (urban recreational fishing group), and E (urban commercial fishing group). An inductively coupled plasma optical emission spectrometer (ICP-OES) and an inductively coupled plasma-mass spectrometer (ICP-MS) were used to analyze the heavy metals in water and sediments.ResultsAn increasing trend of most heavy metals in water from rural to urban lakes was observed. Concentrations of cadmium (Cd), cobalt (Co), lead (Pb), chromium (Cr), arsenic (As), nickel (Ni), magnesium (Mn), iron (Fe), and aluminum (Al) in water were significantly lower in rural group A than those in other groups. Arsenic in sediments of rural group A was lower than those in other groups. No other heavy metal element in sediments was significantly different among groups. The enrichment factor analysis of selected heavy metals showed there were different degrees of enrichments of heavy metals in sediments. The potential ecological risk index showed a low level for heavy metals in sediments of all studied lakes.ConclusionsResults indicated that urban processes could have an impact on heavy metals in lake water. The sources of heavy metals in sediments were more likely from anthropogenic activities. These results could enhance our understanding of metal dynamics in lake ecosystems under urbanization and could help prevent heavy metal pollutions and promote sustainable management of urban ecosystems.
KeywordLakes Water Sediment Heavy metals Rural to urban gradient Urbanization
WOS IDBMC:10.1186/s13717-020-00251-8
PublisherSpringer Berlin Heidelberg
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Document Type期刊论文
Corresponding AuthorXu,Yanxue; Chen,Yushun
Affiliation1.Chinese Academy of Sciences; State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology
2.University of Chinese Academy of Sciences
3.Ministry of Water Resource and Chinese Academy of Sciences; Key laboratory of Ecological Impacts of Hydraulic-Projects and Restoration of Aquatic Ecosystem of Ministry of Water Resources & Institute of Hydroecology
4.University of Hartford; Department of Biology
5.Cornell University; Cornell Biological Field Station and Department of Natural Resources
6.Chinese Academy of Environmental Planning; Water Environment Institute
Recommended Citation
GB/T 7714
Xia,Wentong,Wang,Rui,Zhu,Bin,et al. Heavy metal gradients from rural to urban lakes in central China[J]. Ecological Processes,2020,9(1).
APA Xia,Wentong.,Wang,Rui.,Zhu,Bin.,Rudstam,Lars G..,Liu,Yinglong.,...&Chen,Yushun.(2020).Heavy metal gradients from rural to urban lakes in central China.Ecological Processes,9(1).
MLA Xia,Wentong,et al."Heavy metal gradients from rural to urban lakes in central China".Ecological Processes 9.1(2020).
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