气候变化领域集成服务门户(CCPortal): Responses of tundra soil microbial communities to half a decade of experimental warming at two critical depths

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DOI	10.1073/pnas.1901307116
	Responses of tundra soil microbial communities to half a decade of experimental warming at two critical depths
	Johnston E.R.; Hatt J.K.; He Z.; Wu L.; Guo X.; Luo Y.; Schuur E.A.G.; Tiedje J.M.; Zhou J.; Konstantinidis K.T.
发表日期	2019
ISSN	0027-8424
起始页码	15096
结束页码	15105
卷号	116 期号:30
英文摘要	Northern-latitude tundra soils harbor substantial carbon (C) stocks that are highly susceptible to microbial degradation with rising global temperatures. Understanding the magnitude and direction (e.g., C release or sequestration) of the microbial responses to warming is necessary to accurately model climate change. In this study, Alaskan tundra soils were subjected to experimental in situ warming by ∼1.1 °C above ambient temperature, and the microbial communities were evaluated using metagenomics after 4.5 years, at 2 depths: 15 to 25 cm (active layer at outset of the experiment) and 45 to 55 cm (transition zone at the permafrost/ active layer boundary at the outset of the experiment). In contrast to small or insignificant shifts after 1.5 years of warming, 4.5 years of warming resulted in significant changes to the abundances of functional traits and the corresponding taxa relative to control plots (no warming), and microbial shifts differed qualitatively between the two soil depths. At 15 to 25 cm, increased abundances of carbohydrate utilization genes were observed that correlated with (increased) measured ecosystem carbon respiration. At the 45- to 55-cm layer, increased methanogenesis potential was observed, which corresponded with a 3-fold increase in abundance of a single archaeal clade of the Methanosarcinales order, increased annual thaw duration (45.3 vs. 79.3 days), and increased CH4 emissions. Collectively, these data demonstrate that the microbial responses to warming in tundra soil are rapid and markedly different between the 2 critical soil layers evaluated, and identify potential biomarkers for the corresponding microbial processes that could be important in modeling. © 2019 National Academy of Sciences. All rights reserved.
英文关键词	Climate change; Metagenomics; Permafrost; Soil microbiology; Tundra
语种	英语
scopus关键词	biological marker; carbon; methane; Article; carbohydrate metabolism; cladistics; climate change; controlled study; energy yield; environmental temperature; metagenomics; methanogenesis; Methanosarcinales; microbial community; microbial respiration; nonhuman; phylogeny; population abundance; priority journal; qualitative analysis; soil; soil microflora; species composition; taxonomic rank; tundra soil
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158864
作者单位	Johnston, E.R., School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830, United States; Hatt, J.K., School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States; He, Z., Institute for Environmental Genomics, University of Oklahoma, Norman, OK 73019, United States, Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK 73019, United States; Wu, L., Institute for Environmental Genomics, University of Oklahoma, Norman, OK 73019, United States, Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK 73019, United States; Guo, X., State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100091, China; Luo, Y., Institute for Environmental Genomics, University of Oklahoma, Norman, OK 73019, United States...
推荐引用方式 GB/T 7714	Johnston E.R.,Hatt J.K.,He Z.,et al. Responses of tundra soil microbial communities to half a decade of experimental warming at two critical depths[J],2019,116(30).
APA	Johnston E.R..,Hatt J.K..,He Z..,Wu L..,Guo X..,...&Konstantinidis K.T..(2019).Responses of tundra soil microbial communities to half a decade of experimental warming at two critical depths.Proceedings of the National Academy of Sciences of the United States of America,116(30).
MLA	Johnston E.R.,et al."Responses of tundra soil microbial communities to half a decade of experimental warming at two critical depths".Proceedings of the National Academy of Sciences of the United States of America 116.30(2019).