| Title | Relative Importance of Deterministic and Stochastic Processes on Soil Microbial Community Assembly in Temperate Grasslands |
| Authors | Liu, Nana Hu, Huifeng Ma, Wenhong Deng, Ye Wang, Qinggang Luo, Ao Meng, Jiahui Feng, Xiaojuan Wang, Zhiheng |
| Affiliation | Peking Univ, Coll Urban & Environm Sci, Inst Ecol, Minist Educ, Beijing 100871, Peoples R China Peking Univ, Coll Urban & Environm Sci, Key Lab Earth Surface Proc, Minist Educ, Beijing 100871, Peoples R China Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China Inner Mongolia Univ, Coll Ecol & Environm, Hohhot 010021, Peoples R China Chinese Acad Sci, Res Ctr Ecoenvironm Sci, CAS Key Lab Environm Biotechnol, Beijing 100085, Peoples R China Agricultural Univ, Coll Resources & Environm Sci, Dept Ecol & Ecol Engn, Key Lab Biodivers & Organ Farming, Beijing 100193, Peoples R China |
| Keywords | BETA-DIVERSITY ARCHAEAL COMMUNITIES BACTERIAL PATTERNS ASSOCIATIONS ENVIRONMENT RESPONSES NICHES MODEL RARE |
| Issue Date | Sep-2021 |
| Publisher | MICROORGANISMS |
| Abstract | Changes in species composition across communities, i.e., beta-diversity, is a central focus of ecology. Compared to macroorganisms, the beta-diversity of soil microbes and its drivers are less studied. Whether the determinants of soil microbial beta-diversity are consistent between soil depths and between abundant and rare microorganisms remains controversial. Here, using the 16S-rRNA of soil bacteria and archaea sampled at different soil depths (0-10 and 30-50 cm) from 32 sites along an aridity gradient of 1500 km in the temperate grasslands in northern China, we compared the effects of deterministic and stochastic processes on the taxonomic and phylogenetic beta-diversity of soil microbes. Using variation partitioning and null models, we found that the taxonomic beta-diversity of the overall bacterial communities was more strongly determined by deterministic processes in both soil layers (the explanatory power of environmental distance in topsoil: 25.4%; subsoil: 47.4%), while their phylogenetic counterpart was more strongly determined by stochastic processes (the explanatory power of spatial distance in topsoil: 42.1; subsoil 24.7%). However, in terms of abundance, both the taxonomic and phylogenetic beta-diversity of the abundant bacteria in both soil layers was more strongly determined by deterministic processes, while those of rare bacteria were more strongly determined by stochastic processes. In comparison with bacteria, both the taxonomic and phylogenetic beta-diversity of the overall abundant and rare archaea were strongly determined by deterministic processes. Among the variables representing deterministic processes, contemporary and historical climate and aboveground vegetation dominated the microbial beta-diversity of the overall and abundant microbes of both domains in topsoils, but soil geochemistry dominated in subsoils. This study presents a comprehensive understanding on the beta-diversity of soil microbial communities in the temperate grasslands in northern China. Our findings highlight the importance of soil depth, phylogenetic turnover, and species abundance in the assembly processes of soil microbial communities. |
| URI | http://hdl.handle.net/20.500.11897/626198 |
| DOI | 10.3390/microorganisms9091929 |
| Indexed | SCI(E) |
| Appears in Collections: | 城市与环境学院 地表过程分析与模拟教育部重点实验室 |
