干旱区生态环境知识资源中心(Arid): Carbon fluxes response of an artificial sand-binding vegetation system to rainfall variation during the growing season in the Tengger Desert

Arid

DOI	10.1016/j.jenvman.2020.110556
	Carbon fluxes response of an artificial sand-binding vegetation system to rainfall variation during the growing season in the Tengger Desert
	Zhou, Yuanyuan; Li, Xinrong; Gao, Yanhong; He, Mingzhu; Wang, Mingming; Wang, Yanli; Zhao, Lina; Li, Yunfei
通讯作者	Li, XR
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2020
卷号	266
英文摘要	Revegetation is considered as an effective approach for desertification control, and artificial sand-binding vegetation exerts a significant contributor to carbon cycling in arid and semiarid regions; however, this is largely determined by the rainfall regime. We measured carbon fluxes (the net ecosystem CO2 exchange (NEE), the gross ecosystem productivity (GEP) and the ecosystem respiration (R-eco)) during the growing season of 2014-2016 using the eddy covariance technique and explored the effects of rainfall variables (amount, timing distribution and pulse size) and environmental factors on carbon fluxes at different time scales. The system had NEE values of -117.5 and -98.9 g C m(-2) during the growing seasons of 2015 (dry year) and 2016 (wet year), respectively. When the rainfall amount did not differ significantly between spring and autumn, the cumulative GEP was greater in spring than in autumn, whereas the cumulative R-eco and NEE showed the opposite pattern. Small (<5 mm) rain events failed to trigger obvious GEP and NEE pulses, whereas >= 5 mm or a series of small rain events led to high assimilation but with hysteresis. The magnitude of R-eco increased as the rain pulses increased. The Random Forest (RF) algorithm revealed that soil water contents had a great impact on carbon fluxes at different integration periods. A correlation analysis showed that the soil water contents were positively correlated with GEP and R-eco and negatively correlated with NEE over different time scales in most cases. These findings suggest that artificial vegetation not only improves habitat restoration but is a significant carbon sink during both dry and wet growing season, which is likely to supplement our knowledge gap to accurately evaluate the current carbon budget in dry land.
英文关键词	Artificial sand-binding vegetation Eddy covariance Carbon fluxes Rainfall Random forest
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000531083400008
WOS关键词	ECOSYSTEM CO2 EXCHANGE ; BIOLOGICAL SOIL CRUSTS ; DIOXIDE EXCHANGE ; PRECIPITATION PULSES ; INTERANNUAL VARIATION ; ARTEMISIA-ORDOSICA ; REVEGETATED STAND ; BAJA-CALIFORNIA ; INNER-MONGOLIA ; WATER
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324420
作者单位	[Zhou, Yuanyuan; Li, Xinrong; Gao, Yanhong; He, Mingzhu; Wang, Mingming; Wang, Yanli; Zhao, Lina; Li, Yunfei] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, Lanzhou 730000, Peoples R China; [Zhou, Yuanyuan; Wang, Mingming; Wang, Yanli; Zhao, Lina; Li, Yunfei] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Yuanyuan,Li, Xinrong,Gao, Yanhong,et al. Carbon fluxes response of an artificial sand-binding vegetation system to rainfall variation during the growing season in the Tengger Desert[J],2020,266.
APA	Zhou, Yuanyuan.,Li, Xinrong.,Gao, Yanhong.,He, Mingzhu.,Wang, Mingming.,...&Li, Yunfei.(2020).Carbon fluxes response of an artificial sand-binding vegetation system to rainfall variation during the growing season in the Tengger Desert.JOURNAL OF ENVIRONMENTAL MANAGEMENT,266.
MLA	Zhou, Yuanyuan,et al."Carbon fluxes response of an artificial sand-binding vegetation system to rainfall variation during the growing season in the Tengger Desert".JOURNAL OF ENVIRONMENTAL MANAGEMENT 266(2020).