气候变化领域集成服务门户(CCPortal): Temperature and Moisture Effects on Soil Respiration in Alpine Grasslands

CCPortal

DOI	10.1097/SS.0b013e31826bdd5d
	Temperature and Moisture Effects on Soil Respiration in Alpine Grasslands
	Chang, Xiaofeng; Zhu, Xiaoxue; Wang, Shiping; Luo, Caiyun; Zhang, Zhenhua; Duan, Jichuang; Bai, Ling; Wang, Wenying
通讯作者	Chang, XF (通讯作者)
发表日期	2012
ISSN	0038-075X
EISSN	1538-9243
起始页码	554
结束页码	560
卷号	177 期号:9
英文摘要	The Tibetan Plateau, the low-latitude and high-altitude cold region, has a variety of soils rich in organic carbon (C). Climate change will have large impacts on soil carbon dioxide (CO2) efflux in the region. These impacts will subsequently affect global-scale climate and C cycle links. However, the magnitude of this feedback is still uncertain. Here we use a laboratory incubation experiment to investigate how soil temperature and moisture affected the rate and temperature sensitivity of heterotrophic respiration of three alpine ecosystems (alpine meadow [M], alpine shrubland [SB], alpine swamp [SP]) on the Tibetan Plateau. Soil samples were incubated under three temperature (0 degrees C, 15 degrees C, and 30 degrees C) and two moisture (50% and 100% water-holding capacity) conditions. The response of soil respiration to temperature and moisture varied with ecosystems. Soil respiration in SP was the most temperature sensitive, and higher moisture increased its temperature sensitivity (Q(10)). The respiration and Q(10) depended on total nitrogen in soils. Moreover, high moisture increased the dependence of Q(10) on total nitrogen. Our results suggest that rising temperature in Tibetan Plateau may cause a positive feedback to the soil C cycle, particularly coupled with increasing precipitation and N addition.
关键词	ORGANIC-MATTER DECOMPOSITION MICROBIAL RESPIRATION CLIMATE-CHANGE CARBON MINERALIZATION SUBSTRATE CONTROLS TIBETAN PLATEAU SENSITIVITY RESPONSES WATER CO2
英文关键词	Alpine soils; climate change; incubation; temperature sensitivity; soil respiration; Tibetan Plateau
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:000309380200004
来源期刊	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/258072
推荐引用方式 GB/T 7714	Chang, Xiaofeng,Zhu, Xiaoxue,Wang, Shiping,et al. Temperature and Moisture Effects on Soil Respiration in Alpine Grasslands[J]. 中国科学院青藏高原研究所,2012,177(9).
APA	Chang, Xiaofeng.,Zhu, Xiaoxue.,Wang, Shiping.,Luo, Caiyun.,Zhang, Zhenhua.,...&Wang, Wenying.(2012).Temperature and Moisture Effects on Soil Respiration in Alpine Grasslands.SOIL SCIENCE,177(9).
MLA	Chang, Xiaofeng,et al."Temperature and Moisture Effects on Soil Respiration in Alpine Grasslands".SOIL SCIENCE 177.9(2012).