Health assessment of aquatic ecosystem based on microbial integrity index——A case study on lakes in Dongxihu District of Wuhan
ZHANG Di-tao1,2, ZHANG Peng1,3, WANG Si-yang1, ZHANG Liang2, CHANG Jian-bo1,3
1. State Key Laboratory of Water Resources Engineering and Management(Wuhan University), Wuhan 430072, China; 2. Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650500, China; 3. Hubei Key Laboratory of Water System Science for Sponge City Construction, Wuhan University, Wuhan 430072, China
Abstract:In the assessment of ecosystem health based on Index of Integrity (IBI), fish, benthic organisms, and living algae are often used as indicators. However, the number of samples available for assessment has become lesser with a sharp decrease in the producers and consumers. Here, five lakes in Dongxihu District of Wuhan City were taken as the research area, and the Microbe IBI (M-IBI) evaluation approach was established by using the water microorganism data obtained with the environmental DNA (eDNA) technology. After comparing and scoring the water quality and field habitat conditions, five sampling points in Ganjiajiao Lake were selected as the reference; and six important biological indicators were selected to develop the ecosystem health scoring and evaluation approach. The results show that among all the 19sampling points, 7sites were evaluated being healthy, accounting for 36.84%; 8sites being sub-healthy, accounting for 42.11%; and 4sites being general, accounting for 21.05%. All the sites in Ganjiajiao Lake and Yangsijing Lake were at the health level. The evaluation results can reasonably reflect the health status of different lakes, indicating a wide application potential of the eDNA-based M-IBI method in the health assessment of degraded lake ecosystems.
张迪涛, 张鹏, 王司阳, 张亮, 常剑波. 基于微生物完整性指数的水生态系统健康评价——以武汉市东西湖区湖泊群为例[J]. 中国环境科学, 2023, 43(6): 3055-3067.
ZHANG Di-tao, ZHANG Peng, WANG Si-yang, ZHANG Liang, CHANG Jian-bo. Health assessment of aquatic ecosystem based on microbial integrity index——A case study on lakes in Dongxihu District of Wuhan. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(6): 3055-3067.
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