Microbial diversity and community structure under ground-source arsenic stress
The role of microbial community structure characteristics in the release and enrichment of ground-source arsenic(As)is highly important,with ground-source As being a major factor in altering the microbial community structure.Studying the response of microorganisms to As can help us understand the mechanisms of adaptation and evolution of microbes to different As concentrations.This study investigated the impact of varying ground-source As concentrations(S1 group with low As concentration and S2 group with higher As concentration)on the microbial diversity and community structure of the Kuitun River Basin,utilizing field investigation,high-throughput sequencing,and microbial analysis.These results indicated that ground-source As could alter microbial diversity and community structure.Diversity analysis revealed an increased ground-source As concentration,which reduced the mean values of the Ace and Simpson indices in the S2 group by 87.2 and 0.04,respectively.Simpson's index initially increased and then decreased.The microbial compositions of the S1 and S2 groups demonstrated similarities and differences.The S1 group had three dominant bacteria that were identical to the S2 group,namely Arthrobacter,Acinetobacter,and Novosphingobium.However,the corresponding proportions of dominant bacteria in the S2 group were 8.01％,1.32％,and 3.21％higher than those in the S1 group.Distance-based redundancy and network analyses demonstrated that As and sampling depth significantly influenced the microbial community and that the interaction between microbial species in the S2 group was weak.These results show that an increased ground-source As concentration leads to high tolerance,high stability,and singleness of the microbial community.
ground-source arsenicmicroorganismnetwork analysisKuitun River Basin
NETL
NSTL
万方数据
