globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13755
论文题名:
Enhanced decomposition of stable soil organic carbon and microbial catabolic potentials by long-term field warming
作者: Feng W.; Liang J.; Hale L.E.; Jung C.G.; Chen J.; Zhou J.; Xu M.; Yuan M.; Wu L.; Bracho R.; Pegoraro E.; Schuur E.A.G.; Luo Y.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
语种: 英语
英文关键词: Diversity ; Geochip ; Incubation ; Inverse modeling ; Long-term warming ; Metagenomics ; Microbial community ; Soil organic carbon ; Turnover
英文摘要: Quantifying soil organic carbon (SOC) decomposition under warming is critical to predict carbon-climate feedbacks. According to the substrate regulating principle, SOC decomposition would decrease as labile SOC declines under field warming, but observations of SOC decomposition under warming do not always support this prediction. This discrepancy could result from varying changes in SOC components and soil microbial communities under warming. This study aimed to determine the decomposition of SOC components with different turnover times after subjected to long-term field warming and/or root exclusion to limit C input, and to test whether SOC decomposition is driven by substrate lability under warming. Taking advantage of a 12-year field warming experiment in a prairie, we assessed the decomposition of SOC components by incubating soils from control and warmed plots, with and without root exclusion for 3 years. We assayed SOC decomposition from these incubations by combining inverse modeling and microbial functional genes during decomposition with a metagenomic technique (GeoChip). The decomposition of SOC components with turnover times of years and decades, which contributed to 95% of total cumulative CO2 respiration, was greater in soils from warmed plots. But the decomposition of labile SOC was similar in warmed plots compared to the control. The diversity of C-degradation microbial genes generally declined with time during the incubation in all treatments, suggesting shifts of microbial functional groups as substrate composition was changing. Compared to the control, soils from warmed plots showed significant increase in the signal intensities of microbial genes involved in degrading complex organic compounds, implying enhanced potential abilities of microbial catabolism. These are likely responsible for accelerated decomposition of SOC components with slow turnover rates. Overall, the shifted microbial community induced by long-term warming accelerates the decomposition of SOC components with slow turnover rates and thus amplify the positive feedback to climate change. © 2017 John Wiley & Sons Ltd.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61185
Appears in Collections:影响、适应和脆弱性

Files in This Item:

There are no files associated with this item.


作者单位: National Engineering Laboratory for Improving Quality of Arable Land Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing China; Department of Microbiology and Plant Biology University of Oklahoma Norman, OK USA; Environmental Science Division and Climate Change Science Institute Oak Ridge National Laboratory Oak Ridge, TN USA; Institute for Environmental Genomics University of Oklahoma Norman, OK USA; Center for Ecological and Environmental Sciences Northwestern Polytechnical University Xi'an China; School of Forest Resources and Conservation University of Florida Gainesville, FL USA; Center for Ecosystem Science and Society Northern Arizona University Flagstaff, AZ USA

Recommended Citation:
Feng W.,Liang J.,Hale L.E.,et al. Enhanced decomposition of stable soil organic carbon and microbial catabolic potentials by long-term field warming[J]. Global Change Biology,2017-01-01
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Feng W.]'s Articles
[Liang J.]'s Articles
[Hale L.E.]'s Articles
百度学术
Similar articles in Baidu Scholar
[Feng W.]'s Articles
[Liang J.]'s Articles
[Hale L.E.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Feng W.]‘s Articles
[Liang J.]‘s Articles
[Hale L.E.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.