globalchange  > 气候变化与战略
DOI: 10.5194/tc-14-3907-2020
论文题名:
Permafrost thawing exhibits a greater influence on bacterial richness and community structure than permafrost age in Arctic permafrost soils
作者: Ji M.; Kong W.; Liang C.; Zhou T.; Jia H.; Dong X.
刊名: Cryosphere
ISSN: 19940416
出版年: 2020
卷: 14, 期:11
起始页码: 3907
结束页码: 3916
语种: 英语
英文关键词: age structure ; arctic environment ; bacterium ; community structure ; frozen ground ; permafrost ; species richness ; thawing ; Actinobacteria ; Alphaproteobacteria ; Bacteria (microorganisms) ; Chloroflexi ; Deltaproteobacteria ; Firmicutes
英文摘要: Global warming accelerates permafrost thawing and changes its microbial community structure, but little is known about how microorganisms in permafrost with different ages respond to thawing. Herein, we disentangled the relative importance of permafrost age (young, medium-aged, old, and ancient, spanning from 50 to 5000 years) and thawing status (active, transitional, and permanently frozen) in shaping bacterial community structure using HiSeq sequencing of the 16S rRNA gene. Our results revealed significant influences of both permafrost thawing and age on bacterial richness. The bacterial richness was significantly higher in the young and thawed permafrost, and the richness increase was mainly observed in Firmicutes, Actinobacteria, Chloroflexi, Deltaproteobacteria, and Alphaproteobacteria. Permafrost thawing led to a gradual change in bacterial community structure and increased contribution of determinism. Permutational analysis of variance demonstrated that thawing significantly changed bacterial community structure at all soil ages, but the community convergence due to permafrost thawing was not observed. Structural equation modeling revealed that permafrost thawing exhibited a greater influence on both bacterial richness and community structure than permafrost age. Our results indicate that microorganisms in permafrost with different ages respond differently to thawing, which eventually leads to distinct bacterial community compositions and different organic carbon decomposition processes in Arctic permafrost. © 2020 Author(s).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/164494
Appears in Collections:气候变化与战略

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作者单位: Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences (CAS), Beijing, 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100039, China; Cas Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China; Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China; State Key Laboratory of Earth Surface Processes and Resource Ecology, College of Resources Science and Technology, Beijing Normal University, Beijing, 100875, China

Recommended Citation:
Ji M.,Kong W.,Liang C.,et al. Permafrost thawing exhibits a greater influence on bacterial richness and community structure than permafrost age in Arctic permafrost soils[J]. Cryosphere,2020-01-01,14(11)
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