干旱区生态环境知识资源中心(Arid): Small precipitation events enhance the Eurasian grassland carbon sink

Arid

DOI	10.1016/j.ecolind.2021.108242
	Small precipitation events enhance the Eurasian grassland carbon sink
	Legesse, Tsegaye Gemechu; Dong, Gang; Jiang, Shicheng; Chen, Jingyan; Dong, Xiaobing; Daba, Nano Alemu; Sorecha, Eba Muluneh; Qu, Luping; Tian, Li; Shao, Changliang
通讯作者	Shao, CL (corresponding author), Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China. ; Tian, L (corresponding author), Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China.
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2021
卷号	131
英文摘要	Different sizes of precipitation are specifically essential in controlling plant physiological processes in ecosystems and extremely important for predicting the effects of precipitation on arid and semiarid region carbon cycle. However, the sizes of precipitation events and their role in carbon flux processes remain unclear. A consecutive three years (2014-2016) eddy covariance flux measurements were conducted to investigate the changes in carbon fluxes under different sizes of precipitation in Mongolia - typical steppe (TPL), meadow steppe (MDW) and shrubland (SHB). Most of the precipitation distributions were dominated by small size events over all sites of the study area. Gross primary productivity reached highest on days with 2 mm d-1 and 5 mm d-1 of precipitation in 2015 and 2014, respectively in TPL, whereas the highest gross primary productivity observed at 10-25 mm d-1 precipitation size in both MDW and SHB. The ecosystem respiration changed positively with different sizes of precipitation events, except for the 5 mm d-1 and 10 mm d-1 precipitation size in the study sites. There existed positive relationship between net ecosystem CO2 exchange (NEE) and small size precipitation event in both TPL and MDW. The slight association was detected between NEE and small size precipitation (<2 mm) events in SHB during the study years. By contrast, the strong relationship was observed between large precipitation sizes and NEE (p < 0.01) in SHB. Overall, this study highlights the different responses of carbon flux to changes in the event size distribution of precipitation in grassland ecosystems which may help to predict how grassland structure and characteristic will respond to climatic change.
英文关键词	Ecosystem carbon flux Eddy-covariance Grassland Mongolian Plateau Small size precipitation
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000704587500003
WOS关键词	RAINFALL EVENTS ; INNER-MONGOLIA ; EXTREME PRECIPITATION ; SEMIARID GRASSLAND ; SOIL CARBON ; ECOSYSTEM ; WATER ; FLUXES ; PULSE ; VARIABILITY
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363003
作者单位	[Legesse, Tsegaye Gemechu; Dong, Xiaobing; Daba, Nano Alemu; Shao, Changliang] Chinese Acad Agr Sci, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 100081, Peoples R China; [Legesse, Tsegaye Gemechu; Dong, Xiaobing; Daba, Nano Alemu; Shao, Changliang] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China; [Dong, Gang] Shanxi Univ, Sch Life Sci, Taiyuan 030006, Peoples R China; [Jiang, Shicheng] Northeast Normal Univ, Key Lab Vegetat Ecol, Minist Educ, Changchun 130024, Peoples R China; [Chen, Jingyan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Sorecha, Eba Muluneh] Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China; [Qu, Luping] Fujian Agr & Forestry Univ, Coll Forestry, Fuzhou 350002, Peoples R China; [Tian, Li] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Qianyanzhou Ecol Res Stn, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Legesse, Tsegaye Gemechu,Dong, Gang,Jiang, Shicheng,et al. Small precipitation events enhance the Eurasian grassland carbon sink[J]. 中国科学院地理科学与资源研究所,2021,131.
APA	Legesse, Tsegaye Gemechu.,Dong, Gang.,Jiang, Shicheng.,Chen, Jingyan.,Dong, Xiaobing.,...&Shao, Changliang.(2021).Small precipitation events enhance the Eurasian grassland carbon sink.ECOLOGICAL INDICATORS,131.
MLA	Legesse, Tsegaye Gemechu,et al."Small precipitation events enhance the Eurasian grassland carbon sink".ECOLOGICAL INDICATORS 131(2021).