Beyond biogeographic patterns:Processes shaping the microbial landscape in soils and sediments along the Yangtze River  

作　　者：Wenjie Wan Geoffrey MGadd Ji‐Dong Gu Wenzhi Liu Peng Chen Quanfa Zhang Yuyi Yang 

机构地区：[1]Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden,Chinese Academy of Sciences,Wuhan,China [2]Danjiangkou Wetland Ecosystem Field Scientific Observation and Research Station,Chinese Academy of Sciences&Hubei Province,Wuhan,China [3]Geomicrobiology Group,School of Life Sciences,University of Dundee,Dundee,Scotland,UK [4]State Key Laboratory of Heavy Oil Processing,State Key Laboratory of Petroleum Pollution Control,China University of Petroleum,Beijing,China [5]Environmental Science and Engineering Group,Guangdong Technion‐Israel Institute of Technology,Guangdong,China

出　　处：《mLife》2023年第1期89-100,共12页微生物（英文）

基　　金：supported by the National Natural Science Foundation of China(42107147);Youth Innovation Promotion Association of the Chinese Academy of Sciences(2017388);National Science and Technology Fundamental Resources Investigation Program of China(2019FY100603);the Open Foundation of the State Key Laboratory of Urban and Regional Ecology of China(SKLURE2021-2-5).

摘　　要：Deciphering biogeographic patterns of microorganisms is important for evaluating the maintenance of microbial diversity with respect to the ecosystem functions they drives.However,ecological processes shaping distribution patterns of microorganisms across large spatial‐scale watersheds remain largely unknown.Using Illumina sequencing and multiple statistical methods,we characterized distribution patterns and maintenance diversity of microorganisms(i.e.,archaea,bacteria,and fungi)in soils and sediments along the Yangtze River.Distinct microbial distribution patterns were found between soils and sediments,and microbial community similarity significantly decreased with increasing geographical distance.Physicochemical properties showed a larger effect on microbial community composition than geospatial and climatic factors.Archaea and fungi displayed stronger species replacements and weaker environmental constraints in soils than that in sediments,but opposite for bacteria.Archaea,bacteria,and fungi in soils showed broader environmental breadths and stronger phylogenetic signals compared to those in sediments,suggesting stronger environmental adaptation.Stochasticity dominated community assemblies of archaea and fungi in soils and sediments,whereas determinism dominated bacterial community assembly.Our results have therefore highlighted distinct microbial distribution patterns and diversity maintenance mechanisms between soils and sediments,and emphasized important roles of species replacement,environmental adaptability,and ecological assembly processes on microbial landscape.Our findings are helpful in predicting loss of microbial diversity in the Yangtze River Basin,and might assist the establishment of environmental policies for protecting fragile watersheds.

关 键 词：environmental breadth environmental constraint phylogenetic signal species replacement stochasticity versus determinism 

分 类 号：S15[农业科学—土壤学]