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Macroinvertebrate Community Structure in Three-Gorges Reservoir, China

โœ Scribed by Mei-Ling Shao; Zhi-Cai Xie; Xin-Qin Han; Ming Cao; Qing-Hua Cai

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
383 KB
Volume
93
Category
Article
ISSN
1434-2944

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โœฆ Synopsis

Abstract

We investigated the macroinvertebrate community structure in Threeโ€Gorges Reservoir during a threeโ€year period after the reservoir became operational. Comparison with data of previous authors obtained before the damming showed that the benthic community changed drastically in the reservoir. Oligochaetes and chironomids dominate the present community. An apparent annual cycle in the benthic community (expressed as richness, density and community type) was found in the second year, lagging one year behind the annual cycle of transparency. After the second year, a Naisโ€“Polypedilum community type, occurring in winter and spring with low inflow discharge and high transparency, was followed by a Limnodrilus community type that occurred in autumn and summer under contrasting conditions. Despite river regulation and damming, it appeared that macroinvertebrates in subtropical canyonโ€shaped reservoirs remained influenced by floods. (ยฉ 2008 WILEYโ€VCH Verlag GmbH & Co. KGaA, Weinheim)

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