Resistance potential of soil bacterial communities along a biodiversity gradient in forest ecosystems  

作　　者：Jialiang Kuang Dongmei Deng Shun Han Colin T.Bates Daliang Ning Wensheng Shu Jizhong Zhou 

机构地区：[1]The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters,Ministry of Education,School of Environment and Energy,South China University of Technology,Guangzhou,China [2]Institute for Environmental Genomics,and Department of Microbiology and Plant Biology,University of Oklahoma,Norman,Oklahoma,USA [3]State Key Laboratory of Biocontrol,Guangdong Key Laboratory of Plant Resources and Conservation of Guangdong Higher Education Institutes,College of Ecology and Evolution,Sun Yat-sen University,Guangzhou,China [4]Guangxi Key Laboratory of Green Processing of Sugar Resources,College of Biological and Chemical Engineering,Guangxi University of Science and Technology,Liuzhou,China [5]School of Life Sciences,South China Normal University,Guangzhou,China [6]School of Civil Engineering and Environmental Sciences,University of Oklahoma,Norman,Oklahoma,USA [7]School of Computer Sciences,University of Oklahoma,Norman,Oklahoma,USA.8Earth and Environmental Sciences,Lawrence Berkeley National Laboratory,Berkeley,California,USA.

出　　处：《mLife》2022年第4期399-411,共13页微生物（英文）

基　　金：the National Natural Science Foundation of China(Nos.31600403,31800422,41673111,U1501232,41622106,31971553,and 31700470);the Natural Science Foundation of Guangdong Province,China(No.2016A030312003);the Natural Science Foundation of Guangxi Province,China(No.2017GXNSFBA198099);the U.S.National Science Foundation(NSF A22-0042).

摘　　要：Higher biodiversity is often assumed to be a more desirable scenario for maintaining the functioning of ecosystems,but whether species-richer communities are also more disturbance-tolerant remains controversial.In this study,we investigated the bacterial communities based on 472 soil samples from 28 forests across China with associated edaphic and climatic properties.We developed two indexes(i.e.,community mean tolerance breadth[CMTB]and community mean response asynchrony[CMRA])to explore the relationship between diversity and community resistance potential.Moreover,we examined this resistance potential along the climatic and latitudinal gradients.We revealed that CMTB was significantly and negatively related to species richness,resulting from the changes in balance between relative abundances of putative specialists and generalists.In comparison,we found a unimodal relationship between CMRA and richness,suggesting that higher biodiversity might not always lead to higher community resistance.Moreover,our results showed differential local patterns along latitude.In particular,local patterns in the northern region mainly followed general relationships rather than those for the southern forests,which may be attributed to the differences in annual means and annual variations of climate conditions.Our findings highlight that the community resistance potential depends on the composition of diverse species with differential environmental tolerance and responses.This study provides a new,testable evaluation by considering tolerance breadth and response asynchrony at the community level,which will be helpful in assessing the influence of disturbance under rapid shifts in biodiversity and species composition as a result of global environmental change.

关 键 词：ecological resistance forest soil bacterial community latitudinal gradient specialist–generalist balance species richness 

分 类 号：S71[农业科学—林学]