长荡湖底栖动物群落结构及与环境因子关系

Community structure of zoobenthos and its relationship withenvironmental factors in Changdang Lake

为了研究长荡湖底栖动物群落结构组成以及影响因子,与2018年1—12月逐月对长荡湖湖区10个采样点进行了调查分析。长荡湖底栖动物共检出13种,主要为寡毛类、摇蚊幼虫以及软体动物3大类;通过优势度指数结果表明长荡湖底栖动物优势种为颤蚓(Tubifex)、黄色羽摇蚊(Chironomus flaviplumus)、刺铗长足摇蚊(Tanypus punctipennis)和梨形环棱螺(Bellamya purrificata);RDA多元统计分析结果显示,TN、COD Mn、水深和总溶解固体是影响底栖动物优势种的主要水环境因子。

In order to study the community composition and impact factors of zoobenthos communities in Changdang Lake,10 sampling points in Changdang Lake area were investigated and analyzed from January to December 2018.The results showed that 13 species of zoobenthos were detected in Changdang Lake,mainly including oligochaetes,chironomid larvae and mollusks.The dominant index results indicated that the dominant species of zoobenthos in Changdang Lake were Tubifex,Chinonomus flaviplumus,Tanypus punctipennis and Bellamya purrificata.The results of RDA multivariate statistical analysis showed that total nitrogen concentration,permanganate index,water depth and total dissolved solids were the main water environmental factors affecting the dominant species of zoobenthos.