文献类型：期刊文献

英文题名：Homogeneous selection is stronger for fungi in deeper peat than in shallow peat in the low-temperature fens of China

作者：Tian, Jianqing[1,2] Huang, Xinya[3,4] Chen, Huai[3,4] Kang, Xiaoming[5] Wang, Yanfen[6]

第一作者：Tian, Jianqing

通信作者：Tian, JQ[1];Chen, H[2];Chen, H[3]

机构：[1]Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China;[2]Chinese Acad Sci, Inst Microbiol, State Key Lab Mycol, Beijing 100101, Peoples R China;[3]Chinese Acad Sci, Chengdu Inst Biol, CAS Key Lab Mt Ecol Restorat & Bioresource Utiliz, Chengdu 610041, Peoples R China;[4]Chinese Acad Sci, Chengdu Inst Biol, Ecol Restorat & Biodivers Conservat Key Lab Sichu, Chengdu 610041, Peoples R China;[5]Chinese Acad Forestry, Inst Wetland Res, Beijing 100091, Peoples R China;[6]Univ Chinese Acad Sci, Beijing 100049, Peoples R China

年份：2022

卷号：212

外文期刊名：ENVIRONMENTAL RESEARCH

收录：;EI(收录号：20235015204063);Scopus(收录号：2-s2.0-85130298588);WOS:【SCI-EXPANDED(收录号:WOS:000880062100001)】；

基金：This work was supported by the Second Tibetan Plateau Scientific Expedition (Grant Number, 2019QZKK0304).

语种：英文

外文关键词：Yeast; Homogeneous selection; Dispersal limitation; Mean annual precipitation; Fen

摘要：Peatlands have accumulated enormous amounts of carbon over millennia, and climate changes threatens the release of this carbon into the atmosphere. Fungi are crucial drivers of global carbon cycling because they are the principal decomposer of organic matter in peatlands. However, the fungal community composition and ecological preferences in peat remain unclear, which restricts our ability to evaluate the role of the fungal community in peat biogeochemical functions. We investigated 54 soils from 6 low-temperature peatlands across China to fill this knowledge gap. The peat was divided into above-water table (AWT) and below-water table (BWT) layers based on the water table fluctuation. We investigated fungal community assembly processes and drivers for each peat layer. The results showed that fungal communities differed significantly among peat layers. The relative abundance of symbiotrophs was significantly higher in the AWT (17.4%) than in the BWT (9.0%), while the abundances of yeast and litter saprotrophs were obviously lower in the AWT than in the BWT. Our results revealed that the assemblage of both fungal taxonomic and phylogenetic communities was mainly governed by stochastic processes in both AWT (87.8%) and BWT (58.6%) layers. However, in the BWT, the relative importance of deterministic processes (28.4%) significantly increased, indicating a potential deterministic environmental selection induced by permanently anaerobic condition. Mean annual precipitation and mean annual temperature were the most critical drives for the assemblage of the fungal community in the BWT. These observations collectively indicate that fungal community assembly is depth-dependent, implying different community assembly mechanisms and ecological functions along the peat profile. These findings highlight the importance of climate driven deep peat fungal community composition assemblages and suggest the potential to project the changes in fungal diversity with ongoing climate change.