干旱区生态环境知识资源中心(Arid): Divergent responses of grassland productivity and plant diversity to intra-annual precipitation variability across climate regions: A global synthesis

Arid

DOI	10.1111/1365-2745.14149
	Divergent responses of grassland productivity and plant diversity to intra-annual precipitation variability across climate regions: A global synthesis
	Su, Jishuai; Zhang, Yi; Xu, Fengwei
通讯作者	Xu, FW
来源期刊	JOURNAL OF ECOLOGY
ISSN	0022-0477
EISSN	1365-2745
出版年	2023
卷号	111 期号:9 页码:1921-1934
英文摘要	Global warming intensifies the hydrological cycle and may result in changes in the frequency and intensity of precipitation events. However, a knowledge gap still exists about the general influences of intra-annual precipitation variability on grassland plant diversity and ecosystem function at the global scale.Here, we synthesized field manipulative experiments from 66 publications to quantify the effects of intra-annual precipitation variability increases (IPVI) on community biomass and plant diversity in grasslands worldwide.At the global scale, we found that IPVI generally increased grassland community above-ground biomass (AGB) by 6.90%, and decreased grass biomass and soil ammonium content by 10.38% and 25.35% respectively. IPVI increased and decreased total AGB in arid and humid regions, respectively, and IPVI enhanced grassland below-ground biomass and plant species richness in arid regions, but showed no effect in humid regions. Furthermore, moderate IPVI stimulated plant species richness and community biomass in arid grasslands, while extreme IPVI impaired them in mesic grasslands. Changes in total AGB under IPVI were related to changes in the biomass of plant functional groups, species richness and soil moisture. Structural equation modelling demonstrated that climate conditions (mean annual temperature and mean annual precipitation) and background soil properties (soil sand content and soil organic carbon content) jointly regulated grassland total AGB responses to IPVI across climate regions.Synthesis. Overall, our study shows divergent responses of grassland productivity and diversity to IPVI in arid and humid regions. Accounting for climate, edaphic properties and precipitation variability can help improve our ability to predict the responses of grassland ecosystems to future changes in precipitation at global scales.
英文关键词	above-ground biomass grassland intra-annual precipitation variability increase meta-analysis soil properties soil water availability species richness
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001007093500001
WOS关键词	FUNCTIONAL TRAITS EXPLAIN ; NET PRIMARY PRODUCTIVITY ; EXTREME PRECIPITATION ; SOIL RESPIRATION ; RAINFALL VARIABILITY ; ORGANIC-MATTER ; CARBON FLUXES ; METAANALYSIS ; DYNAMICS ; REGIMES
WOS类目	Plant Sciences ; Ecology
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397256
推荐引用方式 GB/T 7714	Su, Jishuai,Zhang, Yi,Xu, Fengwei. Divergent responses of grassland productivity and plant diversity to intra-annual precipitation variability across climate regions: A global synthesis[J],2023,111(9):1921-1934.
APA	Su, Jishuai,Zhang, Yi,&Xu, Fengwei.(2023).Divergent responses of grassland productivity and plant diversity to intra-annual precipitation variability across climate regions: A global synthesis.JOURNAL OF ECOLOGY,111(9),1921-1934.
MLA	Su, Jishuai,et al."Divergent responses of grassland productivity and plant diversity to intra-annual precipitation variability across climate regions: A global synthesis".JOURNAL OF ECOLOGY 111.9(2023):1921-1934.