文献类型：期刊文献

英文题名：Aridity and decreasing soil heterogeneity reduce microbial network complexity and stability in the semi-arid grasslands

作者：Wang, Congwen[1,2] Pan, Xu[3] Yu, Wanying[1,4] Ye, Xuehua[1] Erdenebileg, Enkhmaa[5] Wang, Chengjie[6] Ma, Linna[1] Wang, Renzhong[1,2] Huang, Zhenying[1] Indree, Tuvshintogtokh[5] Liu, Guofang[1]

第一作者：Wang, Congwen

通信作者：Huang, ZY[1];Liu, GF[1]

机构：[1]Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China;[2]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[3]Chinese Acad Forestry, Inst Wetland Res, Beijing Key Lab Wetland Serv & Restorat, Beijing 100091, Peoples R China;[4]Northeast Normal Univ, Inst Grassland Sci, Key Lab Vegetat Ecol, Minist Educ, Changchun 130024, Jilin, Peoples R China;[5]Mongolian Acad Sci, Bot Garden & Res Inst, Ulaanbaatar 13330, Mongolia;[6]Inner Mongolia Agr Univ, Coll Grassland Resource & Environm, Hohhot 010011, Inner Mongolia, Peoples R China

年份：2023

卷号：151

外文期刊名：ECOLOGICAL INDICATORS

收录：;EI(收录号：20232014092959);Scopus(收录号：2-s2.0-85159200783);WOS:【SCI-EXPANDED(收录号:WOS:001007661300001)】；

基金：This study was funded by the Strategic Priority Research Program of the CAS (XDA26010101) , the Ministry of Education and Science and the Science and Technology Foundation of Mongolia (ShGh/BNHAU/- 2019/28 (?y ? x/? HXA ?/-2019/28) ) , and National Key Research and Development Program of China (2018YFE0182800) .

语种：英文

外文关键词：Aridity; Soil heterogeneity; Microbial network structure; Network complexity; Network stability; Biotic interactions; Grasslands

摘要：Soil microbes play vital roles in mediating the functions and services of terrestrial ecosystems in the context of ongoing climate change and human disturbance. There are complex interactions between soil microbial taxa. However, research on the drivers of soil microbial network complexity and stability based on microbial taxa interactions is still in its infancy. We examined network structure and the complexity and stability of soil microbial communities across a large-scale environmental gradient in semi-arid grasslands of northern China by combining network theory and high-throughput sequencing. We found that aridity was the strongest driver of soil microbial network structure. Increasing aridity directly reduced the complexity and stability of soil microbial networks by decreasing the ratio of microbial taxa that participated in network construction and the ratio of potential positive and negative interactions of networks. Soil heterogeneity enhanced microbial network complexity and stability by potentially promoting diverse host plants and mediating uneven distribution of soil resources. These findings suggest that aridity and decreasing soil heterogeneity may have detrimental influences on soil microbial functions and the associated plant performance. This study provides new insights into the controls of climatic and/or edaphic variables in regulating soil microbial networks and highlights the importance of environmental heterogeneity in community assembly mechanisms of soil microbes.