State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; School of Environmental Studies, China University of Geosciences, Wuhan 430074, China.
Sci Total Environ. 2022 Nov 10;846:157505. doi: 10.1016/j.scitotenv.2022.157505. Epub 2022 Jul 21.
We investigated the long-term effects (6 years) of sediment improvement and submerged plant restoration of a subtropical shallow urban lake, Hangzhou West Lake China. To reveal the lake ecosystems variations, we analyzed the sediment properties, submerged macrophyte characteristics, sediment microorganisms, and benthic macroinvertebrate communities from 2015 to 2020. The ecological restoration project decreased sediment TP and OM, increased submerged macrophyte biomass and sediment microbial diversity, and improved the benthic macroinvertebrate communities in the restored area. The sediment TP decreased from 2.94 mg/g in 2015 to 1.33 mg/g in 2020. The sediment OM of the restored area decreased from 27.44 % in 2015 to 8.08 % in 2020. Principal component analysis (PCA) confirmed that the restoration improved the sediment conditions, making it suitable for the growth of submerged macrophytes, and then sped up the restoration and reconstruction of the lake ecosystem. These results have significant implications on the ecological management of shallow lakes.
我们研究了中国亚热带浅水城市湖泊——杭州西湖的底泥改善和沉水植物恢复的长期（6 年）效果。为了揭示湖泊生态系统的变化，我们从 2015 年到 2020 年分析了沉积物特性、沉水植物特征、沉积物微生物和底栖大型无脊椎动物群落。生态恢复工程降低了沉积物 TP 和 OM，增加了沉水植物生物量和沉积物微生物多样性，并改善了恢复区的底栖大型无脊椎动物群落。沉积物 TP 从 2015 年的 2.94mg/g 下降到 2020 年的 1.33mg/g。恢复区沉积物 OM 从 2015 年的 27.44%下降到 2020 年的 8.08%。主成分分析（PCA）证实，恢复改善了沉积物条件，有利于沉水植物的生长，从而加速了湖泊生态系统的恢复和重建。这些结果对浅水湖泊的生态管理具有重要意义。
