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引用本文:吴召仕,蔡永久,陈宇炜,邵晓阳,高俊峰.太湖流域主要河流大型底栖动物群落结构及水质生物学评价.湖泊科学,2011,23(5):686-694. DOI:10.18307/2011.0504
WU Zhaoshi,CAI Yongjiu,CHEN Yuwei,SHAO Xiaoyang,GAO Junfeng.Assemblage structure investigation of macrozoobenthos and water quality bioassessment of the main river systems in Taihu Basin. J. Lake Sci.2011,23(5):686-694. DOI:10.18307/2011.0504
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太湖流域主要河流大型底栖动物群落结构及水质生物学评价
吴召仕1,2, 蔡永久1,2, 陈宇炜1, 邵晓阳3, 高俊峰1
1.中国科学院南京地理与湖泊研究所, 南京 210008;2.中国科学院研究生院, 北京 100049;3.杭州师范大学生命与环境科学学院, 杭州 310036
摘要:
2010年4月和7月对太湖流域五水系(苕溪、南河、洮滆、黄浦江和沿江水系)73个采样点的大型底栖动物进行了两次调查, 分析各水系底栖动物群落结构及其与环境因子之间的关系, 并评价各水系的水质状况.所有采样点共记录底栖动物88种, 隶属于3门8纲48科.全流域主要河流大型底栖动物的平均密度和生物量分别为5888.91 ind./m2和105.18g/m2.寡毛类占平均密度的94.19%, 腹足类在生物量中所占比例最高, 为72.50%, 霍甫水丝蚓在五水系中均处优势地位.相似性分析结果表明沿江水系与苕溪、南河、洮滆和黄浦江水系, 苕溪与洮滆水系底栖群落具有显著差异.霍甫水丝蚓是导致这五个水系群落结构差异的最主要原因, 其次是铜锈环棱螺、苏式尾鳃蚓、羽摇蚊、钩虾属一种、红裸须摇蚊、河蚬、小摇蚊属一种、摇蚊亚科一种、侧叶雕翅摇蚊、中国长足摇蚊和长角涵螺.典范对应分析表明高锰酸盐指数、正磷酸盐磷、总氮、硝态氮与大型底栖动物群落显著相关.BPIWright指数评价结果发现五水系整体处在中污染状态。
关键词:  太湖流域  水系  底栖动物  生物评价
DOI:10.18307/2011.0504
分类号:
基金项目:国家水体污染控制与治理科技重大专项项目(2008ZX07526007);科技部科技基础工作专项项目(2006FY110600)联合资助
Assemblage structure investigation of macrozoobenthos and water quality bioassessment of the main river systems in Taihu Basin
WU Zhaoshi1,2, CAI Yongjiu1,2, CHEN Yuwei1, SHAO Xiaoyang3, GAO Junfeng1
1.Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China;2.Graduate University of Chinese Academy of Sciences, Beijing 100049, P.R.China;3.College of Life and Environment Sciences, Hangzhou Normal university, Hangzhou 310036, P.R.China
Abstract:
Aimed at characterizing the assemblage structure of macrozoobenthos, identifying the key influencing environmental fac-tors and evaluating the water quality in terms of biological indexes, we investigated macrozoobenthos at 73 sites of the five river sys-tems (Rivers Tiaoxi, Nanhe, Taoge, Huangpu and Yanjiang)within Taihu Basin during April and June of 2010.Total 88 species from 48 families, 8 classes and 3 phyla have been found in the investigations.The mean density of macrozoobenthos was 5888.91 ind./m2, in which the proportion of oligochaetes was 94.19%.The mean biomass of macrozoobenthos was 105.18 g/m2, of gas-tropods with 72.50% in total biomass.Limnodrilus hoffmeisteri was the dominant species in all river systems.One-way analysis of similarity(ANOSIM)showed that macrozoobenthos assemblages in the Yanjinag River system differed significantly from other four river systems, and those of Tiaoxi and the Taoge River systems differed significantly.L.hoffmeisteri was primarily responsible for dissimilarities of macrozoobenthos assemblages among the five river systems, followed by Bellamya aeruginosa, Branchiura sowerbyi, Chironomus plumosus, Gammarus sp., Propsilocerus akamusi, Corbicula fluminea, Microchironomus sp., Chironominae sp., Glyptotendipes lobiferus, Tanypus chinensis and Alocinma longicornis.Canonical Correspondence Analysis showed that CODMn, PO4-P, TN and NO3-N were strongly correlated with the macrozoobenthos assemblages.The results of bioassessment using the BPI and the Wright Indexes indicated that the five river systems were mostly at status of intermediate polluted.
Key words:  Taihu Basin  river systems  macrozoobenthos  bioassessment
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