生态学报2017，Vol.37Issue(13)：4483-4494,12.DOI:10.5846/stxb201601130086
三峡成库后香溪河库湾底栖动物群落演变及库湾纵向分区格局动态
Macroinvertebrate succession and longitudinal zonation dynamics in Xiangxi Bay,after impoundment of the Three Gorges Reservoir
摘要
Abstract
Studying the succession of reservoir ecosystems is of great importance to both freshwater ecosystem research and reservoir management.However,little research has been reported regarding the succession of the Three Gorges Reservoir ecosystem after its impoundment in June 2003.In the present study,we analyzed the macroinvertebrate succession and reservoir zonation of Xiangxi Bay,a tributary of the Three Gorges Reservoir,from August 2003 to July 2010 in different impoundment stages.We found that Chironomidae and Tubificidae were the first to colonize after the first impoundment,with Chironomidae as the main group.Limnodrilus hoffmeisteri dominated the community gradually,and Nais inflata established itself as an additional dominant species from April 2004.The total macroinvertebrate density and richness increased from the first stage,exhibited a spatial pattern of "high in the middle and low in the two edges".The density peaked in April 2006 (24,146 ind./m2),declined remarkably after the second stage of impoundment,and changed slightly after the third stage.Fewer rare species were observed in the third stage than in the other two stages,which indicated that the community became more stable gradually.Two-way indicator species analysis revealed a stable zonation pattern during the first stage;however,the community type changed during the second stage,which implied that the stage was associated with strong disturbance.Afterward,we observed seasonal fluctuations in the community type,which was coupled to seasonal fluctuations of the water level.This indicated that the macroinvertebrate assemblage gradually adapted to the periodic reservoir operation of the Three Gorges Reservoir and that the community structure exhibited stable periodic fluctuations.关键词
大型深水水库/底栖动物/生态系统演替/纵向分区/三峡水库Key words
Large reservoir/macroinvertebrate/ecosystem succession/longitudinal zonation/Three Gorges Reservoir引用本文复制引用
张敏,蔡庆华,渠晓东,邵美玲..三峡成库后香溪河库湾底栖动物群落演变及库湾纵向分区格局动态[J].生态学报,2017,37(13):4483-4494,12.基金项目
国家自然科学基金资助项目(51309031) （51309031）
国家水体污染控制与治理科技重大专项资助项目(2012ZX07501002-07) （2012ZX07501002-07）
国家重点实验室专项经费资助项目(2014FBZ03) （2014FBZ03）
