干旱区生态环境知识资源中心(Arid): Negative responses of ecosystem autotrophic and heterotrophic respiration to experimental warming in a Tibetan semi-arid alpine steppe

Arid

DOI	10.1016/j.catena.2019.04.002
	Negative responses of ecosystem autotrophic and heterotrophic respiration to experimental warming in a Tibetan semi-arid alpine steppe
	Zhao, Jingxue 1; Tian, Lihua 2; Wei, Haixia 3; Sun, Feida 4; Li, Ruicheng 1
通讯作者	Zhao, Jingxue
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2019
卷号	179 页码:98-106
英文摘要	Evaluating the responses of ecosystem respiration (Re) and its components to climate change is crucial for predicting terrestrial carbon cycling, particularly for the alpine grassland ecosystems. However, effects of climatic warming on ecosystem heterotrophic respiration (Rh) and autotrophic respiration (Ra) remain poorly understood in semi-arid alpine grasslands. A field manipulative experiment was conducted to investigate the effects of experimental warming on total Re, Rh and Ra in a Tibetan semi-arid alpine steppe during growing seasons of 2013 and 2014. Our results showed that warming decreased seasonal Re, Rh and Ra by 29%, 37% and 13%, respectively. However, warming tended to increase the contribution of Ra to Re (Ra/Re) but decrease that of Rh to Re (Rh/Re). Negative responses of Re was closely related to the changes in plant biomass and soil microbial biomass carbon. The apparent Q(10) values of Ra were higher than those of Re and Rh, with the Q(10) values ranked as Ra > Re > Rh. Warming decreased the apparent Q(10) values of Re and the two components. Our results emphasize that Re and its components respond negatively to experimental warming, and soil carbon loss has the potential to be less under future climatic warming in the Tibetan semi-arid alpine steppe.
英文关键词	Warming Carbon cycles Alpine grasslands Temperature sensitivity The Tibetan Plateau
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000468716800010
WOS关键词	LARGE ALTITUDINAL GRADIENT ; SOIL RESPIRATION ; CLIMATE-CHANGE ; TEMPERATURE SENSITIVITY ; TERRESTRIAL ECOSYSTEMS ; PERMAFROST REGION ; CO2 EXCHANGE ; CARBON-CYCLE ; MEADOW ; PLATEAU
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
来源机构	北京大学 ; 中国科学院青藏高原研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214841
作者单位	1.Peking Univ, Coll Urban & Environm Sci, Dept Ecol, Key Lab Earth Surface Proc,Minist Educ, 5 Yiheyuan Rd, Beijing 100871, Peoples R China; 2.Southwest Minzu Univ, Inst Qinghai Tibetan Plateau, Chengdu 610041, Sichuan, Peoples R China; 3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing 100101, Peoples R China; 4.Sichuan Agr Univ, Anim Sci & Technol Coll, Dept Grassland Sci, Chengdu 611130, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Jingxue,Tian, Lihua,Wei, Haixia,et al. Negative responses of ecosystem autotrophic and heterotrophic respiration to experimental warming in a Tibetan semi-arid alpine steppe[J]. 北京大学, 中国科学院青藏高原研究所,2019,179:98-106.
APA	Zhao, Jingxue,Tian, Lihua,Wei, Haixia,Sun, Feida,&Li, Ruicheng.(2019).Negative responses of ecosystem autotrophic and heterotrophic respiration to experimental warming in a Tibetan semi-arid alpine steppe.CATENA,179,98-106.
MLA	Zhao, Jingxue,et al."Negative responses of ecosystem autotrophic and heterotrophic respiration to experimental warming in a Tibetan semi-arid alpine steppe".CATENA 179(2019):98-106.