干旱区生态环境知识资源中心(Arid): Divergent responses of primary production to increasing precipitation variability in global drylands

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DOI	10.1111/gcb.15801
	Divergent responses of primary production to increasing precipitation variability in global drylands
	Hou, Enqing; Litvak, Marcy E.; Rudgers, Jennifer A.; Jiang, Lifen; Collins, Scott L.; Pockman, William T.; Hui, Dafeng; Niu, Shuli; Luo, Yiqi
通讯作者	Hou, EQ ; Luo, YQ (corresponding author), No Arizona Univ, Ctr Ecosyst Sci & Soc, Dept Biol Sci, Flagstaff, AZ 86011 USA.
来源期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
EISSN	1365-2486
出版年	2021
卷号	27 期号:20 页码:5225-5237
英文摘要	Interannual variability in precipitation has increased globally as climate warming intensifies. The increased variability impacts both terrestrial plant production and carbon (C) sequestration. However, mechanisms driving these changes are largely unknown. Here, we examined mechanisms underlying the response of aboveground net primary production (ANPP) to interannual precipitation variability in global drylands with mean annual precipitation (MAP) <500 mm year(-1), using a combined approach of data synthesis and process-based modeling. We found a hump-shaped response of ANPP to precipitation variability along the MAP gradient. The response was positive when MAP < similar to 300 mm year(-1) and negative when MAP was higher than this threshold, with a positive peak at 140 mm year(-1). Transpiration and subsoil water content mirrored the response of ANPP to precipitation variability; evaporation responded negatively and water loss through runoff and drainage responded positively to precipitation variability. Mean annual temperature, soil type, and plant physiological traits all altered the magnitude but not the pattern of the response of ANPP to precipitation variability along the MAP gradient. By extrapolating to global drylands (<500 mm year(-1) MAP), we estimated that ANPP would increase by 15.2 +/- 6.0 Tg C year(-1) in arid and hyper-arid lands and decrease by 2.1 +/- 0.5 Tg C year(-1) in dry sub-humid lands under future changes in interannual precipitation variability. Thus, increases in precipitation variability will enhance primary production in many drylands in the future.
英文关键词	aboveground net primary production data synthesis drylands mean annual precipitation precipitation variability process-based model
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000678891000001
WOS关键词	NET PRIMARY PRODUCTION ; SEMIARID ECOSYSTEMS ; RAINFALL VARIABILITY ; CARBON-CYCLE ; SENSITIVITY ; GRADIENT ; LEGACIES ; DROUGHT ; REGIMES ; GRASS
WOS类目	Biodiversity Conservation ; Ecology ; 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/2XILL650/363455
作者单位	[Hou, Enqing; Jiang, Lifen; Luo, Yiqi] No Arizona Univ, Ctr Ecosyst Sci & Soc, Dept Biol Sci, Flagstaff, AZ 86011 USA; [Litvak, Marcy E.; Rudgers, Jennifer A.; Collins, Scott L.; Pockman, William T.] Univ New Mexico, Dept Biol, MSC03-2020, Albuquerque, NM 87131 USA; [Hui, Dafeng] Tennessee State Univ, Dept Biol Sci, Nashville, TN 37203 USA; [Niu, Shuli] Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Hou, Enqing,Litvak, Marcy E.,Rudgers, Jennifer A.,et al. Divergent responses of primary production to increasing precipitation variability in global drylands[J]. 中国科学院地理科学与资源研究所,2021,27(20):5225-5237.
APA	Hou, Enqing.,Litvak, Marcy E..,Rudgers, Jennifer A..,Jiang, Lifen.,Collins, Scott L..,...&Luo, Yiqi.(2021).Divergent responses of primary production to increasing precipitation variability in global drylands.GLOBAL CHANGE BIOLOGY,27(20),5225-5237.
MLA	Hou, Enqing,et al."Divergent responses of primary production to increasing precipitation variability in global drylands".GLOBAL CHANGE BIOLOGY 27.20(2021):5225-5237.