水生态学杂志Issue(5)：43-51,9.
金沙江干流攀枝花江段鱼类种类组成和群落结构研究
Temporal Distribution Patterns of Fish Community Structure and Species Composition in the Panzhihua Section of the Jinsha River
摘要
Abstract
Water resource development on the Jinsha River could have profound effects on the fish resources.With the construction of Guanyinyan hydropower station and the impoundment and operation of Xiangjiaba and Xiluodu hydropower stations in the middle reach of Jinsha River,the Panzhihua reach has become an important habitat for fish species adapted to running water.This study focused on the composition,diversity and community structure of fish species in this region.The results will help characterize and conserve the fish resources in this reach,provide essential information for the sustainable use of the fishery resource and assess the ecological impacts produced by the hydropower projects in the middle and lower reaches of the Jinsha River.Investigations were made on the fish catches from the main stream of the Jinsha River (from Yalong River estuary to Geliping town in Panzhihua city) from 2009 to 2012.Three sample sites (Geliping,Qingxiangping and Yalong River estuary)were selected and 156 fish catches,collected mainly by gillnets and hooks,were examined.Fish samples were identified according to The Fish ofSichuan and other literature resources and full length,body length and body weight were measured for each individual.The data was then used to analyze temporal patterns of species composition and fish community struc-ture.A total of 60 fish species,belonging to 3 orders,10 families and 37 genera were identified during the four year study period and the number of fish species decreased each year.Cluster analysis (CA)showed that fish spe-cies composition could be divided into two groups:Group I (2009-2010)and Group II (201 1 -2012),but one-way analysis of similarity (one-way ANOSIM)indicated no significant difference between Group I and Group II (R=1,p=33.3% >0.05).The biodiversity analysis of fish community showed that Margalef richness index (R),Shannon-Wiener diversity index (H)and Pielou evenness index (E)all decreased after 2010.The analy-sis on the temporal distribution of fish community by CA showed that fish community structure was also divided into two groups:Group I (2009-2010)and Group II (2011 -2012)and,again,one-way ANOSIMindicated no sig-nificant difference between Group I and Group II (R=0.92,P=27.6%>0.05).Similarity percentage analysis (SIMPER)indicated that fish species with declining populations over the four years were primarily the Cobitidae species that prefer running water,and the species that grow to a relatively large size and are adapted to cold water. Species that increased in abundance were mainly two species of Gobioninae that also prefer running water and two other small size species(Ctenogobius giurinus,Rhodeus sinensis)adapted to slow or static water.A comprehensive strategy was proposed for conserving fish resources and mitigating impacts of hydropower development in this region that includes habitat protection and restoration,improved fisheries management,strict limits to prevent over-fish-ing,ecological operation of the hydropower facilities.Furthermore,suggestions were made to enhance research on artificial reproduction of rare and endemic fish species and strengthen scientific study of the biology,genetic diver-sity and habitat requirements of fish species impacted by development of hydropower resources so as to accumulate data necessary for species protection and conservation.关键词
金沙江干流/攀枝花江段/鱼类/种类组成/群落结构Key words
Jinsha River main stem/Panzhihua section/fish/species composition/community structure分类
农业科技引用本文复制引用
杨志,唐会元,朱迪,高少波,徐薇,万力,龚昱田,乔晔..金沙江干流攀枝花江段鱼类种类组成和群落结构研究[J].水生态学杂志,2014,(5):43-51,9.基金项目
国家自然科学基金项目（51209151，51179109，51209149，51379134），中国长江三峡集团公司项目（0799527）。 （）
