单 位：
State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, 71 East Beijing Road, Nanjing 210008 (China);Department of Integrative Biotechnology, Sungkyunkwan University, 300 Chuncheon-Dong, Suwon 16419 (Korea);Department of Forestry, Environment and Systems, Kookmin University, Seoul 02707 (Korea);School of Biological Sciences, Seoul National University, 1 Gwanak-ro, Seoul 08826 (Korea);School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210008 (China);Department of Biological Sciences, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16227 (Korea;Key laboratory of Ministry of Education for Environment Change and Resources Use in Beibu Gulf, Guangxi Key Laboratory of Earth Surface Processes and Intelligent Simulation, Nanning Normal University, 175 East Mingxiu Road, Nanning 530001 (China);Department of Biological Sciences, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 16227 (Korea);Korea Polar Research Institute, Incheon 21990 (Korea);College of Life Science and Technology, Guangxi University, 100 Daxue Road, Nanning 530004 (China);School of Natural Sciences, Department of Biological Sciences, Keimyung University, Daegu 42601 (Korea);Institut National Recherche Scientifique, Institut Armand-Frappier Santé Biotechnologie, 531 Boulevard des Prairies, Laval H7V1B7 (Canada)
摘 要：
Nematodes play an important role in ecosystems; however, very little is known about their assembly processes and the factors influencing them. We studied nematode communities in bulk soils from three Asian mountain ecosystems to determine the assembly processes of free-living nematode metacommunities and their driving factors. On each mountain, elevations span a range of climatic conditions with the potential to reveal assembly processes that predominate across multiple biomes. A phylogenetic null modeling framework was used to analyze 18S rRNA gene amplicons to quantify various assembly processes. We found that phylogenetic turnover between nematode communities on all mountains was dominated by stochastic processes, with “undominated processes” being the most predominant stochastic factor. Elevation has a significant impact on the relative importance of deterministic and stochastic processes. A variety of climatic and edaphic variables significantly influenced the variations in community assembly processes with elevation, even though their impacts were not consistent between the mountains. Overall, our results indicate that free-living nematode metacommunities in a wide range of environments are largely structured by stochastic processes rather than by niche-based deterministic processes, suggesting that metacommunities of soil free-living nematodes may respond to climate change in a largely unpredictable way.
