干旱区生态环境知识资源中心(Arid): Community-level responses to increasing dryness vary with plant growth form across an extensive aridity gradient

Arid

DOI	10.1111/jbi.14114
	Community-level responses to increasing dryness vary with plant growth form across an extensive aridity gradient
	Ding, Jingyi; Eldridge, David J.
通讯作者	Eldridge, DJ (corresponding author), Univ New South Wales, Sch Biol Earth & Environm Sci, Ctr Ecosyst Sci, Sydney, NSW, Australia.
来源期刊	JOURNAL OF BIOGEOGRAPHY
ISSN	0305-0270
EISSN	1365-2699
出版年	2021
卷号	48 期号:7 页码:1788-1796
英文摘要	Aim Perennial plant communities are crucial for regulating ecological processes and maintaining ecosystem functions. Variation in community structure is driven by both biotic and abiotic factors, reflecting adaptation strategies of plant communities to various environments. Although much is known about the response of individual perennial plants to drier climates, empirical evidence of the community-level responses to increasing dryness is limited. Location Eastern Australia; 1500 km gradient. Taxon Perennial plants. Methods We measured the abundance and size distribution (median, skewness and variance) of perennial plant communities from different growth forms (trees, shrubs and grasses), the spatial arrangement of trees in the overstorey and both biotic (competition) and abiotic (climate, soil properties) factors at 150 sites along an extensive aridity gradient from humid to arid areas. We used regression analyses and linear models to explore variation in community structure with increasing aridity and key driving factors for different perennial plant communities. Results Variation in community structure differed with growth form. As aridity increased, trees had wider canopies and were spatially aggregated, shrubs became miniaturised, but highly variable in size, and grasses comprised more larger individuals. Biotic and abiotic factors exerted different effects on different growth forms, with trees and shrubs consistently affected by competition and aridity, respectively, whereas grasses were weakly affected by aridity, summer rainfall and soil texture. Main conclusions Our study highlights the idiosyncratic adaptation strategies used by trees, shrubs and grasses in response to drying climates at the community level through their effect on the size distribution or spatial aggregation. The structure of different perennial growth forms was influenced by different effects from either biotic (competition) or abiotic (climate, soil) factors. Under forecasted drier climates, canopy expansion and greater aggregation of trees might enhance resource sinks and shelter for diverse biota, potentially shielding plant communities against predicted aridification.
英文关键词	climate change plant community resource competition size distribution skewness soil texture vegetation pattern
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000635265200001
WOS类目	Ecology ; Geography, Physical
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350743
作者单位	[Ding, Jingyi; Eldridge, David J.] Univ New South Wales, Sch Biol Earth & Environm Sci, Ctr Ecosyst Sci, Sydney, NSW, Australia
推荐引用方式 GB/T 7714	Ding, Jingyi,Eldridge, David J.. Community-level responses to increasing dryness vary with plant growth form across an extensive aridity gradient[J],2021,48(7):1788-1796.
APA	Ding, Jingyi,&Eldridge, David J..(2021).Community-level responses to increasing dryness vary with plant growth form across an extensive aridity gradient.JOURNAL OF BIOGEOGRAPHY,48(7),1788-1796.
MLA	Ding, Jingyi,et al."Community-level responses to increasing dryness vary with plant growth form across an extensive aridity gradient".JOURNAL OF BIOGEOGRAPHY 48.7(2021):1788-1796.