干旱区生态环境知识资源中心(Arid): The competitive advantage of C4 grasses over CAM plants under increased rainfall variability

Arid

DOI	10.1007/s11104-019-04216-5
	The competitive advantage of C4 grasses over CAM plants under increased rainfall variability
	Huang, Heng 1; Yu, Kailiang 2; Fan, Ying 3; D’Odorico, Paolo 1
通讯作者	Huang, Heng
来源期刊	PLANT AND SOIL
ISSN	0032-079X
EISSN	1573-5036
出版年	2019
卷号	442 期号:1-2 页码:483-495
英文摘要	Background and aims The intensity of extreme rainfall events is increasing in many regions of the world, with important impacts on community dynamics and ecosystem functioning especially in water-limited ecosystems. The impact of the intensification of extreme precipitation on mixed communities of CAM plants and dryland C4 grasses remains poorly understood. Methods Through a set of greenhouse experiments we investigated the effect of increasing intraseasonal rainfall variability on two separate pairs of CAM and C4 grass species (C. imbricata and B. eriopoda; O. phaeacantha and B. curtipendula) that coexist in arid grasslands across the southwest USA. Results The increased rainfall variability did not significantly change the biomass of C. imbricata while increasing the biomass of B. eriopoda when these two species coexisted. More extreme rainfall regimes caused a 24.8% decrease in B. curtipendula (grass) biomass, compared with a 71.3% decline in the O. phaeacantha CAM plant. Significantly lower nocturnal carbon assimilation rates and higher stem volume-to-surface area ratios were found in CAM plants in mixture than in monoculture. Conclusions Our study suggests that C4 grasses may outcompete CAM plants through greater access to deep soil water under increased rainfall variability and highlights the important role of hydrologic conditions as determinants of the competitive relations between CAM plants and grasses, their community composition, and ecological resilience in dryland ecosystems.
英文关键词	Crassulacean acid metabolism Rainfall variability Drylands Water stress Soil water distribution Climate change
类型	Article
语种	英语
国家	USA ; Switzerland ; Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000485324700033
WOS关键词	CRASSULACEAN ACID METABOLISM ; NET PRIMARY PRODUCTION ; CLIMATE VARIABILITY ; PRECIPITATION VARIABILITY ; TERRESTRIAL ECOSYSTEMS ; CHIHUAHUAN DESERT ; RESPONSES ; IMPACTS ; CO2 ; DESERTIFICATION
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS研究方向	Agriculture ; Plant Sciences
来源机构	北京师范大学 ; University of California, Berkeley
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218006
作者单位	1.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA; 2.Swiss Fed Inst Technol, Inst Integrat Biol, CH-8092 Zurich, Switzerland; 3.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China
推荐引用方式 GB/T 7714	Huang, Heng,Yu, Kailiang,Fan, Ying,et al. The competitive advantage of C4 grasses over CAM plants under increased rainfall variability[J]. 北京师范大学, University of California, Berkeley,2019,442(1-2):483-495.
APA	Huang, Heng,Yu, Kailiang,Fan, Ying,&D’Odorico, Paolo.(2019).The competitive advantage of C4 grasses over CAM plants under increased rainfall variability.PLANT AND SOIL,442(1-2),483-495.
MLA	Huang, Heng,et al."The competitive advantage of C4 grasses over CAM plants under increased rainfall variability".PLANT AND SOIL 442.1-2(2019):483-495.