气候变化领域集成服务门户(CCPortal): Effect of changing precipitation in different periods on precipitation use efficiency in a semi-arid grassland

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DOI	10.1111/jvs.13223
	Effect of changing precipitation in different periods on precipitation use efficiency in a semi-arid grassland
	Wang, Hongjiao; He, Yuying; Qiao, Daiyu; Xiao, Rui; Yang, Zhongling
发表日期	2024
ISSN	1100-9233
EISSN	1654-1103
起始页码	35
结束页码	1
卷号	35 期号:1
英文摘要	QuestionClimate change intensifies global and regional water cycles, leading to changes in both the magnitude and timing of precipitation. Precipitation use efficiency (PUE) plays a crucial role in measuring the response of above-ground net primary productivity (ANPP) to precipitation changes. However, little is known about how changes in precipitation during different periods affect PUE.MethodsUsing a manipulation precipitation experiment in a semi-arid steppe, we simulated a 60% increase and decrease in precipitation during the early (April-June), late (July-September), and entire (April-September) growing seasons across 2015-2021 to examine the effects of changes in precipitation timing on PUE.ResultsThe results showed that: (1) decreased precipitation in the late growing season (DLP) and whole growing season (DWP) stimulated PUE by an average of 0.14 and 0.12 g m-2 mm-1 yr-1 respectively, whereas increased precipitation in the late growing season (ILP) and whole growing season (IWP) suppressed PUE by an average of 0.11 and 0.09 g m-2 mm-1 yr-1 respectively. By contrast, neither decreased nor increased precipitation in the early growing season affected PUE; (2) the increased PUE under DLP was primarily attributed to the increase of PUE in grass (GR) and annuals and biennials (AB), whereas the elevation of PUE under DWP was mainly due to an increase of PUE in AB. By contrast, the reduction of PUE under ILP was mainly caused by a decline of PUE in GR; (3) changes in evapotranspiration and leaf dry matter content (LDMC) explained the variation of PUE in AB while changes of PUE in GR was mainly due to the alteration of soil water content and LDMC.ConclusionsThese results suggest that precipitation during the late growing season has a crucial influence on PUE, highlighting the importance of evapotranspiration and LDMC in regulating ecosystem productivity in the semi-arid steppe. Our study showed that precipitation during the late growing season influences community-level PUE through changing the PUE of grass and annuals and biennials, and evapotranspiration and leaf dry matter content play a crucial role in regulating the PUE at community and functional-group levels in the semi-arid steppe.image
英文关键词	above-ground net primary productivity; functional group; precipitation timing; precipitation use efficiency; semi-arid grassland; species trait
语种	英语
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS记录号	WOS:001148398800001
来源期刊	JOURNAL OF VEGETATION SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305843
作者单位	Henan University; Henan University
推荐引用方式 GB/T 7714	Wang, Hongjiao,He, Yuying,Qiao, Daiyu,et al. Effect of changing precipitation in different periods on precipitation use efficiency in a semi-arid grassland[J],2024,35(1).
APA	Wang, Hongjiao,He, Yuying,Qiao, Daiyu,Xiao, Rui,&Yang, Zhongling.(2024).Effect of changing precipitation in different periods on precipitation use efficiency in a semi-arid grassland.JOURNAL OF VEGETATION SCIENCE,35(1).
MLA	Wang, Hongjiao,et al."Effect of changing precipitation in different periods on precipitation use efficiency in a semi-arid grassland".JOURNAL OF VEGETATION SCIENCE 35.1(2024).