基于底栖动物的城市内河水生态状况评价——以圭塘河为例

发布时间：2018-04-19 21:38

本文选题：城市内河 + 底栖动物　；参考：《中国农村水利水电》2017年11期

【摘要】：圭塘河是长沙市唯一的一条城市内河,研究圭塘河的底栖动物及水生态现状对城市河流的生态管理及治理具有一定的指导意义。2016年5-7月对圭塘河的底栖动物及河流水质进行了野外调查,主要研究了圭塘河底栖动物的空间分布特征及群落多样性,所有采样点共鉴定底栖动物24科,其中软体动物4科、寡毛纲2科、水生昆虫13科、十足目3科、蛭纲2科、端足目1科。研究结果显示,圭塘河物种丰富度较低,从生物量来看,除S2外上下游段各点生物量较中游段各点明显偏少,至S10已降至0.054 6 g/m~2;从生物指数来看,S4~S7的各项指数较其他点明显增大,说明这一段栖息地环境得到改善。颤蚓科为圭塘河优势物种,数量百分比为85.37%,水质分析结果显示,圭塘河的水质为Ⅴ类水,颤蚓科的大量繁殖与其关系密切。在功能摄食类群上,圭塘河以直接收集者为主,其次为捕食者和刮食者。该河流的生态状况整体较差,但部分经河流生态治理工程治理后,栖息地环境和生态状况有所改善。
[Abstract]:Guitang River is the only urban river in Changsha. The study of benthic fauna and aquatic ecology in Guitang River has certain guiding significance for the ecological management and management of urban rivers. A field survey of benthic animals and river water quality in Guitang River was carried out from May to July 2016. The spatial distribution and community diversity of benthos in Guitang River were studied. 24 families of benthic animals were identified at all sampling sites, including 4 families of molluscs, 2 families of Oligochaea, 13 families of aquatic insects, 3 families of Decapoda and 2 families of Leech. Carpoda 1 family. The results show that the species richness of Guitang River is low, and the biomass of the upper and lower reaches except S2 is obviously less than that of the middle reaches. By the time S10 reached 0.054 g / m ~ (-2), the index of S _ 4 / S _ 7 was obviously larger than that of other points, which indicated that the habitat environment had improved in this period. The water quality analysis of Guitang River shows that the water quality of Guitang River is class V water, and the abundance of Chryloidaceae is closely related to the water quality of Guitang River, which is the dominant species in Guitang River with a percentage of 85.37.The water quality of Guitang River is a class V. In the functional feeding group, the direct collector was dominant in Guitang River, followed by predator and scrape predator. The ecological condition of the river is poor as a whole, but the habitat environment and ecological condition have been improved after some river ecological treatment project.
【作者单位】：长沙理工大学水利工程学院;水沙科学与水灾害防治湖南省重点实验室;河南科技大学农业装备工程学院;西安理工大学水利水电学院;
【基金】：湖南省教育厅资助科研项目(16B010) 水沙科学与水灾害防治湖南省重点实验室基金资助项目(2016SS04)
【分类号】：X826

【相似文献】