干旱区生态环境知识资源中心(Arid): Plant species-area relationships are determined by evenness, cover and aggregation in drylands worldwide

Arid

DOI	10.1111/geb.12849
	Plant species-area relationships are determined by evenness, cover and aggregation in drylands worldwide
	DeMalach, Niv 1; Saiz, Hugo 2; Zaady, Eli 3; Maestre, Fernando T.2
通讯作者	DeMalach, Niv
来源期刊	GLOBAL ECOLOGY AND BIOGEOGRAPHY
ISSN	1466-822X
EISSN	1466-8238
出版年	2019
卷号	28 期号:3 页码:290-299
英文摘要	Aim Species-area relationships (also known as species-area curves and species accumulation curves) represent the relationship between species richness and the area sampled in a given community. These relationships can be used to describe diversity patterns while accounting for the well-known scale-dependence of species richness. Despite their value, their functional form and parameters, as well as their determinants, have barely been investigated in drylands. Location 171 drylands from all continents except Antarctica. Time period 2006-2013. Major taxa studied Perennial plants. Methods We characterized species-area relationships of plant communities by building accumulation curves describing the expected number of species as a function of the number of sampling units, and later compared the fit of three functions (power law, logarithmic and Michaelis-Menten). We tested the prediction that the effects of aridity, soil pH on the species-area relationship (SAR) are mediated by vegetation attributes such as evenness, cover and spatial aggregation. Results We found that the logarithmic relationship was the most common functional form (c. 50%), followed by Michaelis-Menten (c. 33%) and power law (c. 17%). Functional form was mainly determined by evenness. Power-law relationships were found mostly under low evenness, logarithmic relationships peaked under intermediate evenness and the Michaelis-Menten function increased in frequency with increasing evenness. The SAR parameters approximated by the logarithmic model [small-scale richness (b(0)) and accumulation coefficient (b(1))] were determined by vegetation attributes. Increasing spatial aggregation had a negative effect on the small-scale richness and a positive effect on the accumulation coefficient, while evenness had an opposite effect. In addition, the accumulation coefficient was positively affected by cover. Interestingly, increasing aridity decreased small-scale richness but did not affect the accumulation coefficient. Main conclusions Our findings highlight the role of evenness, spatial aggregation and cover as the main drivers of SARs in drylands, the Earth's largest biome.
英文关键词	aridity biodiversity desert Mediterranean pH scale-dependence species accumulation curve species diversity species richness species-area curve
类型	Article
语种	英语
国家	USA ; Spain ; Israel
开放获取类型	Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000458404200001
WOS关键词	ECOSYSTEM MULTIFUNCTIONALITY ; RICHNESS ; DIVERSITY ; SCALE ; ABUNDANCE ; CURVES ; BIODIVERSITY ; CLIMATE ; ACCUMULATION ; PRODUCTIVITY
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/2XILL650/216093
作者单位	1.Stanford Univ, Dept Biol, Stanford, CA 94305 USA; 2.Univ Rey Juan Carlos, Dept Biol & Geol Fis & Quim Inorgan, Mostoles, Spain; 3.Gilat Res Ctr, Inst Plant Sci, Dept Nat Resources, Agr Res Org,Minist Agr, Gilat, Israel
推荐引用方式 GB/T 7714	DeMalach, Niv,Saiz, Hugo,Zaady, Eli,et al. Plant species-area relationships are determined by evenness, cover and aggregation in drylands worldwide[J],2019,28(3):290-299.
APA	DeMalach, Niv,Saiz, Hugo,Zaady, Eli,&Maestre, Fernando T..(2019).Plant species-area relationships are determined by evenness, cover and aggregation in drylands worldwide.GLOBAL ECOLOGY AND BIOGEOGRAPHY,28(3),290-299.
MLA	DeMalach, Niv,et al."Plant species-area relationships are determined by evenness, cover and aggregation in drylands worldwide".GLOBAL ECOLOGY AND BIOGEOGRAPHY 28.3(2019):290-299.