低头坝养鱼对鱼类局域栖息地环境的影响--基于鱼类个体生态矩阵的分析

摘要

为了解低头坝养鱼对鱼类栖息地环境的影响，2013-2014年共6次调查了乌龙河（长江下游支流）2个可涉水河段样点鱼类的多样性，共采集5目10科21属24种鱼类，通过鱼类个体生态矩阵分析表明，低头坝养殖对下游的鱼类群落产生了较大的影响，并造成河流下游生境趋于单一，水位下降，有机质增加，流速减缓等现象。鱼类个体生态矩阵适合于解析水利工程对周边生境的影响。%In order to find the response of local habitat under the influences of fish culture with the help of low-head dam,Two low-head dams(including upstream dam and downstream dam)within the Wulong Riv⁃er were selected as sampling sites.The fish diversity was surveyed for 6 times in these wadeable reachs of the sampling sites from 2013 to 2014.After all the above is done ,we have collected a total of 24 fish spe⁃cies which belong to 5 orders,21 genera and 24 species. By using autecologymatrix,we found that low-head dam significantly affect on fish community in the downstream,and caused a simpler habitat structure, water shortage,more organics,lower flow current in the downstream site.So the autecologymatrix was certifi⁃cated that it can been used to analyze the effects of irrigation works on Local habitat change.