Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13755 |
Enhanced decomposition of stable soil organic carbon and microbial catabolic potentials by long-term field warming | |
Feng, Wenting1,2; Liang, Junyi2,3,4; Hale, Lauren E.2,5; Jung, Chang Gyo2; Chen, Ji6; Zhou, Jizhong2,5; Xu, Minggang; Yuan, Mengting1,2,5; Wu, Liyou2,5; Bracho, Rosvel7; Pegoraro, Elaine8; Schuur, Edward A. G.8; Luo, Yiqi2 | |
2017-11-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
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 3years. 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. |
英文关键词 | diversity Geochip incubation inverse modeling long-term warming metagenomics microbial community soil organic carbon turnover |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000412322700027 |
WOS关键词 | FUNCTIONAL GENE DIVERSITY ; TEMPERATURE SENSITIVITY ; AUTOTROPHIC RESPIRATION ; USE EFFICIENCY ; RESPONSES ; MATTER ; STOICHIOMETRY ; CLIMATE ; COMMUNITIES ; UNCERTAINTY |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17144 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Natl Engn Lab Improving Qual Arable Land, Beijing, Peoples R China; 2.Univ Oklahoma, Dept Microbiol & Plant Biol, Norman, OK 73019 USA; 3.Oak Ridge Natl Lab, Div Environm Sci, POB 2008, Oak Ridge, TN 37831 USA; 4.Oak Ridge Natl Lab, Climate Change Sci Inst, Oak Ridge, TN USA; 5.Univ Oklahoma, Inst Environm Genom, Norman, OK 73019 USA; 6.Northwestern Polytech Univ, Ctr Ecol & Environm Sci, Xian, Shaanxi, Peoples R China; 7.Univ Florida, Sch Forest Resources & Conservat, Gainesville, FL 32611 USA; 8.No Arizona Univ, Ctr Ecosyst Sci & Soc, Flagstaff, AZ USA |
推荐引用方式 GB/T 7714 | Feng, Wenting,Liang, Junyi,Hale, Lauren E.,et al. Enhanced decomposition of stable soil organic carbon and microbial catabolic potentials by long-term field warming[J]. GLOBAL CHANGE BIOLOGY,2017,23(11). |
APA | Feng, Wenting.,Liang, Junyi.,Hale, Lauren E..,Jung, Chang Gyo.,Chen, Ji.,...&Luo, Yiqi.(2017).Enhanced decomposition of stable soil organic carbon and microbial catabolic potentials by long-term field warming.GLOBAL CHANGE BIOLOGY,23(11). |
MLA | Feng, Wenting,et al."Enhanced decomposition of stable soil organic carbon and microbial catabolic potentials by long-term field warming".GLOBAL CHANGE BIOLOGY 23.11(2017). |
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