Significant tipping points of sediment microeukaryotes forewarn increasing antibiotic pollution  

作　　者：Chaohua Wang Zhiyuan Yao Pingping Zhan Xianghua Yi Jiong Chen Jinbo Xiong 

机构地区：[1]State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products,Ningbo University,Ningbo 315211,China [2]School of Marine Sciences,Ningbo University,Ningbo 315211,China [3]Institute of Ocean Engineering,Ningbo University,Ningbo 315211,China [4]Lanshion Marine Science and Technology Co.,Ltd.,Ningbo 315715,China

出　　处：《Journal of Environmental Sciences》2023年第2期429-439,共11页环境科学学报（英文版）

基　　金：supported by the Natural Science Fund for Distinguished Young Scholars of Zhejiang Province (No. LR19C030001);the National Natural Science Foundation of China (Nos. 31872693, 32071549);the Key Public Welfare Technology Application Research Project of Ningbo (No. 202002N3032);the K.C. Wong Magna Fund in Ningbo University

摘　　要：Antibiotic pollution imposes urgent threats to public health and microbial-mediated ecological processes.Existing studies have primarily focused on bacterial responses to antibiotic pollution,but they ignored the microeukaryotic counterpart,though microeukaryotes are functionally important(e.g.,predators and saprophytes)in microbial ecology.Herein,we explored how the assembly of sediment microeukaryotes was affected by increasing antibiotic pollution at the inlet(control)and across the outlet sites along a shrimpwastewater discharge channel.The structures of sedimentmicroeukaryotic community were substantially altered by the increasing nutrient and antibiotic pollutions,whichwere primarily controlled by the direct effects of phosphate and ammonium(−0.645 and 0.507,respectively).In addition,tetracyclines exerted a large effect(0.209),including direct effect(0.326)and indirect effect(−0.117),on the microeukaryotic assembly.On the contrary,the fungal subcommunity was relatively resistant to antibiotic pollution.Segmented analysis depicted nonlinear responses of microeukaryotic genera to the antibiotic pollution gradient,as supported by the significant tipping points.We screened 30 antibiotic concentration-discriminatory taxa of microeukaryotes,which can quantitatively and accurately predict(98.7%accuracy)the in-situ antibiotic concentration.Sediment microeukaryotic(except fungal)community is sensitive to antibiotic pollution,and the identified bioindicators could be used for antibiotic pollution diagnosis.

关 键 词：Increasing antibiotic pollution Microeukaryotic community Non-linear responses Tipping points Antibiotic concentration-discriminatory taxa 

分 类 号：X52[环境科学与工程—环境工程]