1. Health Assessment on Lake Erhai Using Benthic Index of Biotic Integrity.
- Author
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YANG Sikun, LYU Xingju, GAO Dengcheng, ZHANG Kuidong, WU Junyan, ZHANG Xiaoke, and CUI Yongde
- Subjects
BENTHIC animals ,PEARSON correlation (Statistics) ,LAKES ,ENVIRONMENTAL health ,ECOSYSTEMS ,ECOLOGICAL assessment ,ONLINE monitoring systems - Abstract
To understand the health status of aquatic ecosystem in Lake Erhai, the community structure of benthic animals was investigated based on 27 samples from 11 typical monitoring sections in March, June, September and December 2021, and the benthic index of biotic integrity (B-IBI) assessment system was also established. The results showed that Lake Erhai contains 56 genera and species of benthic animals, which refers to 4 phyla, 6 classes, 28 families and 54 genera. The assessment system of B-IBI for Lake Erhai consists mainly of the total number of classification units, proportion of chironomid individuals, and BMWP index, which obtained by range test, discriminatory power and Pearson correlation screen. The health status of aquatic ecosystem in Lake Erhai can divide into five grades according to ratio scoring method, i.e., >2.61, 2.10~2.61, 1.82~2.10, 1.42~1.82 and <1.42, representing health, sub-health, fair, poor and very poor health status, respectively. Based on above method and standard, the health of aquatic ecosystem for Lake Erhai in 2021 is fair status. Specifically, five, six, five, nine and two sampling sites were in health, sub-health, fair, poor and very poor health status, accounting for 18.5%, 22.2%, 18.5%, 33.3% and 7.4% of the total sites, respectively. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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