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Soil microbial responses to warming and increased precipitation and their implications for ecosystem C cycling

文献类型：期刊论文

作者Zhang, Naili; Liu, Weixing; Yang, Haijun; Yu, Xingjun4; Gutknecht, Jessica L. M.; Zhang, Zhe; Wan, Shiqiang2; Ma, Keping
刊名OECOLOGIA
出版日期2013
卷号173期号:3页码:1125-1142
关键词Carbon utilization Microbial biomass Microbial community composition Respiratory loss of soil carbon Semi-arid grassland
ISSN号0029-8549
DOI10.1007/s00442-013-2685-9
文献子类Article
英文摘要A better understanding of soil microbial ecology is critical to gaining an understanding of terrestrial carbon (C) cycle-climate change feedbacks. However, current knowledge limits our ability to predict microbial community dynamics in the face of multiple global change drivers and their implications for respiratory loss of soil carbon. Whether microorganisms will acclimate to climate warming and ameliorate predicted respiratory C losses is still debated. It also remains unclear how precipitation, another important climate change driver, will interact with warming to affect microorganisms and their regulation of respiratory C loss. We explore the dynamics of microorganisms and their contributions to respiratory C loss using a 4-year (2006-2009) field experiment in a semi-arid grassland with increased temperature and precipitation in a full factorial design. We found no response of mass-specific (per unit microbial biomass C) heterotrophic respiration to warming, suggesting that respiratory C loss is directly from microbial growth rather than total physiological respiratory responses to warming. Increased precipitation did stimulate both microbial biomass and mass-specific respiration, both of which make large contributions to respiratory loss of soil carbon. Taken together, these results suggest that, in semi-arid grasslands, soil moisture and related substrate availability may inhibit physiological respiratory responses to warming (where soil moisture was significantly lower), while they are not inhibited under elevated precipitation. Although we found no total physiological response to warming, warming increased bacterial C utilization (measured by BIOLOG EcoPlates) and increased bacterial oxidation of carbohydrates and phenols. Non-metric multidimensional scaling analysis as well as ANOVA testing showed that warming or increased precipitation did not change microbial community structure, which could suggest that microbial communities in semi-arid grasslands are already adapted to fluctuating climatic conditions. In summary, our results support the idea that microbial responses to climate change are multifaceted and, even with no large shifts in community structure, microbial mediation of soil carbon loss could still occur under future climate scenarios.
学科主题Ecology
出版地NEW YORK
电子版国际标准刊号1432-1939
WOS关键词FATTY-ACID PROFILES ; CLIMATE-CHANGE ; THERMAL ADAPTATION ; ORGANIC-MATTER ; FUNCTIONAL DIVERSITY ; UTILIZATION PATTERNS ; COMMUNITY STRUCTURE ; NITROGEN ADDITION ; PLANT DIVERSITY ; ARCTIC SOIL
WOS研究方向Science Citation Index Expanded (SCI-EXPANDED)
语种英语
WOS记录号WOS:000325819700045
出版者SPRINGER
资助机构Institute of Botany, Chinese Academy of Sciences(Chinese Academy of Sciences) ; Knowledge Innovation Program of the Chinese Academy of Sciences(Chinese Academy of SciencesKnowledge Innovation Program of the Chinese Academy of Sciences) ; International Foundation for Science (IFS)(International Foundation for Science) ; National Natural Science Foundation of China(National Natural Science Foundation of China (NSFC))
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/28177]  
专题植被与环境变化国家重点实验室
作者单位1.Henan Univ, Coll Life Sci, Key Lab Plant Stress Biol, Kaifeng 475004, Henan, Peoples R China
2.Gutknecht, Jessica L. M.] UFZ Helmholtz Ctr Environm Res, Dept Soil Ecol, D-06120 Halle, Saale, Germany
3.Beihua Univ, Coll Forestry, Beijing 132013, Jilin, Peoples R China
4.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Naili,Liu, Weixing,Yang, Haijun,et al. Soil microbial responses to warming and increased precipitation and their implications for ecosystem C cycling[J]. OECOLOGIA,2013,173(3):1125-1142.
APA Zhang, Naili.,Liu, Weixing.,Yang, Haijun.,Yu, Xingjun.,Gutknecht, Jessica L. M..,...&Ma, Keping.(2013).Soil microbial responses to warming and increased precipitation and their implications for ecosystem C cycling.OECOLOGIA,173(3),1125-1142.
MLA Zhang, Naili,et al."Soil microbial responses to warming and increased precipitation and their implications for ecosystem C cycling".OECOLOGIA 173.3(2013):1125-1142.

入库方式： OAI收割

来源：植物研究所

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