水生生物学报2018，Vol.42Issue(6)：1124-1134,11.DOI:10.7541/2018.138
三峡水库蓄水后长江上游鱼类群聚沿河流-水库梯度的空间格局
SPATIAL PATTERN OF FISH ASSEMBLAGES ALONG THE RIVER-RESERVOIR GRADIENT CAUSED BY THE THREE GORGE RESERVOIR (TGR)
摘要
Abstract
We analysed spatial pattern in the fish assemblage structure along a longitudinal gradient of the Upper Yangtze River and the Three Gorges Reservoir.We tested the hypothesis that shifts from lotic to lentic environment affect the richness and structure of the fish assemblage.Samplings were carried out from 2005 to 2012 in four zones:(1) Hejiang reach,river upstream from the reservoir;(2) Mudong reach,upper part of the reservoir;(3) Wanzhou reach,middle part of the reservoir,and (4) Zigui reach,lower part of the reservoir.A total of 368706 fish representing 132 native species of 17 families were collected during the study period with Cyprinidae as the dominant group.The results showed that the native species richness decreased while the non-native species increased from river (Hejiang reach) to reservoir (Zigui reach).Patterns in fish assemblage ordination evaluated by correspondence analysis reflected a clear division of the riverine and reservoir zones.Uppermost sampling stations were characterized by species characteristic of flowing waters,whereas in the lowland most lentic species were captured.Further,22 species,three functional groups (rheophilic,equilibrium,insectivorous) were identified for the upper reach and 16 species,three functional groups (herbivorous,planktivorous,stagnophilic) for the lowland reach by indicator species analysis (P＜0.05).Therefore,it is evident that impoundment of the Three Gorges Reservoir is the major driving factor to structuring the fish assemblage structure along the longitudinal gradient from river to the reservoir.Different fisheries management actions should be made to conserve or rehabilitate native fish assemblages and control invasive non-native species.关键词
鱼类群聚/河流-水库梯度/指示种/三峡水库Key words
Fish assemblages/River-reservoir gradient/Indicator species/Three Gorges Reservoir分类
农业科技引用本文复制引用
林鹏程,刘飞,黎明政,高欣,刘焕章..三峡水库蓄水后长江上游鱼类群聚沿河流-水库梯度的空间格局[J].水生生物学报,2018,42(6):1124-1134,11.基金项目
Supported by the Three Gorges Project eco-environmental monitoring system (JJ[2016]-007) （JJ[2016]-007）
the National Natural Science Foundation of China (51509239) （51509239）
