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Assessment of ecosystem health of river based on microbe index of biotic integrity (M-IBI) —A case study of Zhangcun River in Qingdao |
WANG Shu-wen, LIN Jia-feng, SONG Zhao-lu, LI Xian-guo, ZHANG Da-hai |
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266000, China |
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Abstract To assess the contribution of fungal community bioindicators to river ecosystem evaluations, this study established a microbial integrity index (M-IBI) framework using high-throughput sequencing data of sediment samples collected from Zhangcun River during the wet season (September 2020) and dry season (March 2022). Core evaluation indicators, covering various metric types, were identified through distribution range, discriminatory ability, and correlation analysis. The results indicate that the key indicators for the wet season include the relative abundance of Agaricomycetes, the combined relative abundance of Ascomycota and Basidiomycota, the relative abundance of species negatively correlated with chemical oxygen demand (COD), and the relative abundance of animal pathogens. In contrast, the core indicators for dry season comprise the relative abundance of Hypocreales, the relative abundance of Tremellales, the ratio of Ascomycota to Basidiomycota, and the relative abundance of strains negatively correlated with conductivity and pH. Based on these findings, a fungal community-based M-IBI was calculated, which effectively differentiate the reference and impaired sites, and shows a significant correlation with water quality. The M-IBI based on fungal communities is a reliable and promising method for assessing river ecological conditions.
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Received: 13 March 2024
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KANG Wen-hui, ZHOU Yin-zhu, LEI Mi, HAN Shuang-bao, ZHOU Jin-long. in Xinjiang[J]. CHINA ENVIRONMENTAL SCIENCECE, 2024, 44(7): 3832-3842. |
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