气候变化领域集成服务门户(CCPortal): Responses of soil microbial respiration to thermal stress in alpine steppe on the Tibetan plateau

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DOI	10.1111/j.1365-2389.2012.01441.x
	Responses of soil microbial respiration to thermal stress in alpine steppe on the Tibetan plateau
	Chang, X.; Wang, S.; Luo, C.; Zhang, Z.; Duan, J.; Zhu, X.; Lin, Q.; Xu, B.
通讯作者	Wang, S (通讯作者)
发表日期	2012
ISSN	1351-0754
EISSN	1365-2389
起始页码	325
结束页码	331
卷号	63 期号:3
英文摘要	Extensive research has focused on the temperature sensitivity of microbial respiration in tundra and alpine meadows. However, the response of microbial respiration to thermal stress in alpine steppe soils, which have less organic matter and greater aeration, has received less attention. We investigated spatial and temporal variations in microbial respiration using an incubation experiment under different temperature (0, 15 and 30 degrees C) and different percentages of water-holding capacity (WHC) (50 and 100%) conditions in the alpine steppe, and using a subsequent cooling experiment determined the thermal stress' of soil microorganisms in response to increased temperature in the alpine steppe ecosystem. Microbial respiration rates decreased with increasing temperature at both 50 and 100% WHC for three sampling locations. Thermal stress of soil microorganisms under increased temperatures was found in the alpine steppe because subsequent cooling led to an increase in microbial respiration rates. Soil moisture did not affect microbial respiration, but the temperature sensitivity (Q10) of microbial respiration varied with the interactive effect between soil moisture and sampling location. Our findings suggest that the response of microbial respiration to high temperature may not be always positive as bacteria may experience thermal stress in the alpine steppe. Therefore, it is necessary to include thermal stress responses in alpine steppe models, as they may represent an important negative feedback effect on microbial respiration.
关键词	ORGANIC-MATTER DECOMPOSITION CLIMATE-CHANGE TEMPERATURE SENSITIVITY FOREST SOIL CARBON MINERALIZATION TUNDRA ADAPTATION FEEDBACKS MOISTURE
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:000304084100002
来源期刊	EUROPEAN JOURNAL OF SOIL SCIENCE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258019
推荐引用方式 GB/T 7714	Chang, X.,Wang, S.,Luo, C.,et al. Responses of soil microbial respiration to thermal stress in alpine steppe on the Tibetan plateau[J]. 中国科学院青藏高原研究所,2012,63(3).
APA	Chang, X..,Wang, S..,Luo, C..,Zhang, Z..,Duan, J..,...&Xu, B..(2012).Responses of soil microbial respiration to thermal stress in alpine steppe on the Tibetan plateau.EUROPEAN JOURNAL OF SOIL SCIENCE,63(3).
MLA	Chang, X.,et al."Responses of soil microbial respiration to thermal stress in alpine steppe on the Tibetan plateau".EUROPEAN JOURNAL OF SOIL SCIENCE 63.3(2012).