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长江故道底栖动物群落特征及资源衰退原因分析
Authors
梁小民
潘保柱
+4 more
王宗兴
王洪铸
王海军
舒凤月
Publication date
1 January 2008
Publisher
Abstract
2003—2004年对天鹅洲和老江河两个长江故道的调查表明,该类水体的底栖动物在类群组成上与阻隔湖泊类似,以螺类和水生昆虫为主,但是有较多的流水性和冷水性种类.纵向比较表明两个故道底栖动物生物量比20世纪90年代下降了48.3%-78.6%,软体动物尤为突出.底栖动物资源衰退的原因主要有两个,一是过度渔业,二是江湖阻隔.与长江流域其他类型水体的比较表明在中等程度水文连通的水体中底栖动物种类最多,软体动物尤其是双壳类的现存量明显较高.为发挥长江故道群对泛滥平原生物多样性维持的重要作用,文末提出了关于合理放养和季节性通江的管理建议
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Institute of Hydrobiology, Chinese Academy Of Sciences
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oai:ir.ihb.ac.cn:342005/36343
Last time updated on 08/06/2020