Higher precipitation strengthens the microbial interactions in semi-arid grassland soils
Wang, Shang1; Wang, Xiaobo2,3; Han, Xingguo2,4,5; Deng, Ye1,4
Corresponding AuthorDeng, Ye(
AbstractAim: Growing attention has been focused on the changes in the structure and diversity of microbial communities under altered precipitation pattern, but little is known about how this factor impacts microbial interactions. Our aim was to elucidate the variations of microbial interactions in semi-arid grassland soils and determine the key factor in regulating microbial assemblies in water-limited areas. Location: A c.3,700 km transect across three habitats (desert, desert grassland and typical grassland) in Northern China. Time period: July and August 2012. Major taxa studiedTotal bacteria and archaea. Method: The random matrix theory (RMT)-based network inference approach was used to construct species interaction networks. The relationships between microbial network topology and environmental variables were examined by Mantel and partial Mantel tests. Results: At the regional scale (across habitats), mean annual precipitation was the most important factor constraining the network structure, whereas at the local scale (within a habitat), soil conditions and plant parameters became more important, but their relative effects differed among habitats. In particular, no correlation was detected between the desert network and any environmental factors. The number of central species increased substantially in desert grassland and typical grassland networks in comparison to those in the desert network. Inter- and intra-module connections, particularly negative connections, also increased in the two grassland habitats. Main conclusions: Microbial networks become more complex as precipitation increases. A simple network structure (no connectors between modules, more sparsely distributed species and lower competitive links) and less association with environmental factors in the desert network indicate that microbial communities in extremely dry ecosystems are unstable and vulnerable; that is, future climate change will greatly influence microbial interactions in these extremely dry areas. Overall, our findings provide new insight into the way in which microbes respond to changing precipitation patterns by regulating their interactions in water-limited ecosystems.
Keywordglobal climate change grassland microbial community microbial interactions network analysis precipitation semi-arid ecosystem
Funding OrganizationNational Key Research and Development Plan ; Key Research Program of Frontier Sciences, CAS ; Strategic Priority Research Program of CAS ; CAS 100 talent program
Indexed BySCI
Funding ProjectNational Key Research and Development Plan[2016YFC0500702] ; Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-DQC026] ; Strategic Priority Research Program of CAS[XDB15010302] ; CAS 100 talent program
WOS Research AreaEnvironmental Sciences & Ecology ; Physical Geography
WOS SubjectEcology ; Geography, Physical
WOS IDWOS:000430916700006
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Cited Times:71[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorDeng, Ye
Affiliation1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, CAS Key Lab Environm Biotechnol, 18 Shuangqing Rd, Beijing 100085, Peoples R China
2.Chinese Acad Sci, Inst Appl Ecol, Erguna Forest Steppe Ecotone Res Stn, Shenyang, Liaoning, Peoples R China
3.Northeast Normal Univ, Key Lab Vegetat Ecol, Minist Educ, Changchun, Jilin, Peoples R China
4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing, Peoples R China
5.Chinese Acad Sci, Inst Bot, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Wang, Shang,Wang, Xiaobo,Han, Xingguo,et al. Higher precipitation strengthens the microbial interactions in semi-arid grassland soils[J]. GLOBAL ECOLOGY AND BIOGEOGRAPHY,2018,27(5):570-580.
APA Wang, Shang,Wang, Xiaobo,Han, Xingguo,&Deng, Ye.(2018).Higher precipitation strengthens the microbial interactions in semi-arid grassland soils.GLOBAL ECOLOGY AND BIOGEOGRAPHY,27(5),570-580.
MLA Wang, Shang,et al."Higher precipitation strengthens the microbial interactions in semi-arid grassland soils".GLOBAL ECOLOGY AND BIOGEOGRAPHY 27.5(2018):570-580.
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