Relative roles of niche and neutral processes on turnover of plant,fungal and bacterial communities in arid and semi-arid areas at the regional scale |
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| Institution: | 1. Institute of Loess Plateau, Shanxi University, Key Laboratory of Ecological Restoration of Loess Plateau, Shanxi Province, Taiyuan, 030006, China;2. Technology Development Department, Shanxi Xinghuacun Fenjiu Group Wine Industry Development Zone Limited by Share Ltd, Fenyang, 032200, China;1. Department of Wildlife & Hunting Management, Ministry of Environment & Energy, Terma Alkmanos, Ilisia, 11528 Athens, Hellas;2. Faculty of Veterinary Medicine, University of Thessaly, Karditsa, Hellas;3. Research Division, Hunting Federation of Macedonia and Thrace, Thessaloniki, Hellas;4. Wildlife Laboratory, Department of Forestry and Management of Natural Environment, Technological Education Institute of Thessaly, Larissa, Hellas;1. State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China;2. State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China;3. Institute for Environmental Genomics and Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, USA;4. Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, USA;5. School of Civil Engineering and Environmental Sciences, University of Oklahoma, Norman, OK, USA;1. Microbial Ecology cluster, Genomics Research in Ecology and Evolution in Nature (GREEN), Groningen Institute for Evolutionary Life Sciences (GELIFES), University of Groningen, The Netherlands;1. Jianshui National Feild Station, School of Soil and Water Conservation, Beijing Forestry University, Beijing, 100083, China;2. College of Agriculture, Nanjing Agricultural University, Nanjing, 210095, China;3. Nanjing Institute of Environment Science, Ministry of Environmental Protection of China, Nanjing, 210042, China;4. Department of Biology, Brigham Young University, Provo, UT 84602, USA;5. Institute of Desertification Studies, Chinese Academy of Forestry, Beijing, 100091, China;6. Research Institute of Forestry, Chinese Academy of Forestry, No.1, Dongxiaofu, Xiangshan Road, Haidian District, Beijing, 100091, China;7. Institute of Microbiology, University of Innsbruck, Technikerstr 25d, Innsbruck 6020, Austria;8. Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing, 100083, China |
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| Abstract: | The mechanisms that determine the spatial structure of macroscopic and microbial communities and how they respond to environmental changes are central themes that have been explored in ecological research. However, little is known about the relative roles and importance of neutral and niche-related factors in the assemblage of bacterial, fungal, and plant communities. Here partial Mantel, null model, and variation partitioning analysis were used to compare mechanisms driving the beta diversity of bacteria, fungi and plant communities at the regional scale in arid and semi-arid areas. Denaturing gradient gel electrophoresis (PCR-DGGE) was used to evaluate the distribution pattern of microbial communities, and vegetation survey were conducted to evaluate the characteristics of plant communities. We found that bacterial, fungal, and plant communities were strongly influenced by niche processes at the regional scale in arid and semi-arid areas. Bacteria had a stronger habitat association, indicating community assembly is strongly affected by niche processes. Fungi, with their body size between plants and bacteria, had moderate environment correlation, and plants had less environment association than fungi or bacteria, which suggests that body size may determine the association between organism and environment. We concluded that the pivotal niche process, environmental filtering, weakened with increasing body size, and it should be considered when we evaluate the relative roles of deterministic and stochastic processes in community assemblage. |
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| Keywords: | Assembly of community Regional scale Arid and semi-arid area Plant community Microbial community |
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