【摘要】 基于已开展的巢湖流域水域生物资源调查，综合2013、2023年水质、浮游植物、着生藻类、底栖动物和大型水生植物等资料，分析巢湖水域生物环境状况变化。结果表明：经过10年治巢项目的实施，巢湖流域整体水质有了明显改善，以南淝河和十五里河的水质改善最为明显。浮游植物群落组成发生较大变化，蓝藻门密度比由33.33%降为2.76%，硅藻门、金藻门密度比由11.43%、0.83%分别上升为26.62%、1.76%。底栖动物多样性呈上升趋势，耐污类群密度呈下降趋势。着生硅藻多样性指数总体呈增长趋势，优势群类依然主要为双壳缝目、无壳缝目和单壳缝目，大型水生植物群落优势种组成变化相对较小。本研究可为山水工程生态修复效果科学评估和生态修复方案制定提供数据支撑。更多还原

【Abstract】 Based on the survey of biological resources in Chaohu lake catchment, this study analyzed the changes of biological environment in water quality, phytoplankton, algae, benthic animals and large aquatic plants in 2013 and 2023.The results showed that the whole water quality of Chaohu river catchment has improved obviously after ten years of implementation of the lake treatment project, and the improvement of water quality of Nanfei river and Shiwuli river is the most obvious. The density of cyanophyta decreased from 33.33% to 2.76%, and the density of diatomata and chrysophyta increased from 11.43% and 0.83% to 26.62% and 1.76%, respectively. The diversity of benthic animals increased, and the density of pollution-tolerant species decreased. The diversity index of organic diatoms showed an increasing trend in general, and the dominant groups were still Bivalvina, Acervina and Monocervina. The composition of dominant species in large aquatic plant community displayed a small change. This study provides data support for the scientific evaluation of ecological restoration effect of landscape engineering and the formulation of ecological restoration plan.更多还原