气候变化领域集成服务门户(CCPortal): Permafrost thawing exhibits a greater influence on bacterial richness and community structure than permafrost age in Arctic permafrost soils

CCPortal

DOI	10.5194/tc-14-3907-2020
	Permafrost thawing exhibits a greater influence on bacterial richness and community structure than permafrost age in Arctic permafrost soils
	Ji M.; Kong W.; Liang C.; Zhou T.; Jia H.; Dong X.
发表日期	2020
ISSN	19940416
起始页码	3907
结束页码	3916
卷号	14 期号:11
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).
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
语种	英语
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202116
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
推荐引用方式 GB/T 7714	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],2020,14(11).
APA	Ji M.,Kong W.,Liang C.,Zhou T.,Jia H.,&Dong X..(2020).Permafrost thawing exhibits a greater influence on bacterial richness and community structure than permafrost age in Arctic permafrost soils.Cryosphere,14(11).
MLA	Ji M.,et al."Permafrost thawing exhibits a greater influence on bacterial richness and community structure than permafrost age in Arctic permafrost soils".Cryosphere 14.11(2020).