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题名: Responses of macroinvertebrates and local environment to short-term commercial sand dredging practices in a flood-plain lake
作者: Meng, Xingliang1, 2; Jiang, Xiaoming1; Li, Zhengfei1, 2; Wang, Jun1, 2; Cooper, Keith M.3; Xie, Zhicai1
关键词: Dongting lake ; Aggregate sand dredging ; Impacts of sand dredging ; Macroinvertebrate assemblage
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
发表日期: 2018-08-01
DOI: 10.1016/j.scitotenv.2018.03.086
卷: 631-632, 页:1350-1359
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: In parts of the developing world, the expansion of industrial sand mining activities has led to serious environmental concerns. However, current understanding of the effects of this activity on an inland water ecosystem remains limited. Herein, we choose the "most affected" lake in China (Dongting lake), to assess short-term (1 year) effects of sand dredging on key environmental parameters and on the structure of the macroinvertebrate assemblage. Within the dredged area we observed increases in water depth (on average 2.17 m), turbidity and changes in sediment composition (e.g., increase in % medium sand, and a decrease in % clay). In addition, dredging was associated with a 50 % reduction in taxa richness, Simpson and Shannon-Wiener indices, and a 72 and 99 % reduction in abundance and biomass, respectively. Indirect effects were also observed in the zone surrounding the extraction sites (ca. 500 m), most likely as a result of the dredging processes (e.g., sediment screening and overspill) and water flow. No such effects were observed at a nearby reference site. The direct removal of sediment and indirect alteration of physical conditions (e.g., water depth, turbidity and sediment composition) appear to be the most likely cause of variations in the benthic community. Implications of our findings for the planning, management and monitoring of sand dredging in inland waters are discussed. (C) 2018 Elsevier B.V. All rights reserved.
关键词[WOS]: SMALL LOWLAND RIVER ; EASTERN ENGLISH-CHANNEL ; DONGTING LAKE ; PHYSICAL DISTURBANCE ; BENTHIC COMMUNITIES ; CORBICULA-FLUMINEA ; GRAVEL EXTRACTION ; IMPACT ASSESSMENT ; COASTAL DEPOSITS ; YANGTZE-RIVER
语种: 英语
项目资助者: National Natural Science Foundation of China(41571495) ; Program for Biodiversity Protection(2017HB2096001006) ; National Science and Technology Basic Research Program(2015FY110400-4) ; Key Strategic Program, CAS(ZDRW-ZS-2017-3-2) ; Centre for Environment, Fisheries and Aquaculture Science
WOS记录号: WOS:000432471900134
ISSN号: 0048-9697
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/50885
Appears in Collections:水生生物多样性与资源保护研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Aquat Biodivers & Conservat, Wuhan 430072, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Fisheries & Aquaculture Sci, Ctr Environm, Lowestoft NR33 0HT, Suffolk, England
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