Wen Jia-Qi, Wang Hao-Ran, Chen Yong-Can, Liu Zhao-Wei
State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China.
School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621010, China.
Huan Jing Ke Xue. 2020 Jul 8;41(7):3266-3274. doi: 10.13227/j.hjkx.201912084.
Hydropower plant operation changes river habitats in various aspects, and thus affects the community composition of the river ecosystem. As a result, the river health is adversely affected. The influence of a hydropower plant cascade on river continuity is even more pronounced. In this study, benthic macroinvertebrates and environmental factors were sampled from the Jingbohu Hydropower Plant to the Shiyan Hydropower Plant, along the Mudan River, and the influence of a hydropower plant cascade on the longitudinal distribution of benthic macroinvertebrates was analyzed. The results demonstrate that the hydropower plant cascade affected several environmental variables and led to changes in the community composition of benthic macroinvertebrates in the Mudan River. Significant differences were observed between sites upstream and downstream of the hydropower plants, with more sensitive species downstream of the hydropower plants. "Run-of-river" hydropower plants exert less adverse influence on benthic macroinvertebrates than dam-type plants. The influence of hydropower plants decreases along the longitudinal direction of the river, with the density and richness of benthic macroinvertebrates increasing.
水电站运行在多个方面改变了河流栖息地，进而影响了河流生态系统的群落组成。结果，河流健康受到不利影响。水电站梯级对河流连续性的影响更为显著。在本研究中，沿着牡丹江从镜泊湖水电站到石岩水电站采集了底栖大型无脊椎动物和环境因子样本，并分析了水电站梯级对底栖大型无脊椎动物纵向分布的影响。结果表明，水电站梯级影响了多个环境变量，并导致牡丹江底栖大型无脊椎动物的群落组成发生变化。在水电站上下游站点之间观察到显著差异，水电站下游有更多敏感物种。径流式水电站对底栖大型无脊椎动物的不利影响比坝式水电站小。水电站的影响沿河流纵向方向减弱，底栖大型无脊椎动物的密度和丰富度增加。
