Spatiotemporal variation of microeukaryotic biodiversity and biotic condition associated with disinfectants after the COVID-19 lockdown in Wuhan,China  

作　　者：Fan Li Ruiwen Li Yongyong Guo Yindan Zhang Xiangping Chen Fayu Tan Yanxia Zuo Jie Xiong Lihua Yang Jian Han Bingsheng Zhou Lizhong Zhu 

机构地区：[1]State Key Laboratory of Freshwater Ecology and Biotechnology,Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan,430072,PR China [2]Ecology and Environment Monitoring and Scientific Research Center,Ecology and Environment Administration of Yangtze River Basin,Ministry of Ecology and Environment,Wuhan,430010,PR China [3]University of Chinese Academy of Sciences,Beijing,100039,PR China [4]Wuhan Ecological and Environmental Monitoring Center,Department of Ecology and Environment of Hubei Province,Wuhan,430015,PR China [5]Department of Environmental Science,Zhejiang University,Hangzhou,310058,PR China [6]Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control,Hangzhou,310058,PR China

出　　处：《Water Biology and Security》2024年第3期9-18,共10页水生生物与安全（英文）

摘　　要：Intensive application of chlorine-based disinfectants driven by the COVID-19 pandemic was suspected to be detrimental to receiving water ecosystems,but with little field evidence.We characterized the occurrences of typical disinfectants and microeukaryotic communities in surface waters associated with three wastewater treatment plants(WWTP)-river systems one year after the lockdown in Wuhan,China.Trihalomethanes(THMs)declined from summer 2020(0.01–1.82μg/L)to summer 2021(0.01–0.95μg/L),whereas quaternary ammonium salts(QAs)increased from summer 2020(0.53–6.35 ng/L)to summer 2021(8.49–191 ng/L).Biodiversity monitoring with environmental DNA(eDNA)revealed significant temporal variation in microeukaryotic community composition.The monitored disinfectants were correlated with some eukaryotic communities as demonstrated by redundancy analysis.For example,QAs were positively related to Cryptophyta relative abundance,but negatively related to Rotifera relative abundance.A microeukaryote-based multimetric index indicated ecological impairment near the Han River WWTP outlet in 2020.Our findings indicate the influence of heavily used disinfectants on river microeukaryotic communities,and the usefulness of assessing mid-term ecological risks from disinfectants in the post COVID-19 era.

关 键 词：DISINFECTANTS BIODIVERSITY Biotic condition Wastewater treatment plants-rivers COVID-19 pandemic 

分 类 号：X172[环境科学与工程—环境科学]