干旱区生态环境知识资源中心(Arid): Niche dynamics in amphitropical desert disjunct plants: Seeking for ecological and species-specific influences

Arid

DOI	10.1111/geb.13215
	Niche dynamics in amphitropical desert disjunct plants: Seeking for ecological and species-specific influences
	Quiroga, R. Emiliano; Premoli, Andrea C.; Fernandez, Roberto J.
通讯作者	Quiroga, RE
来源期刊	GLOBAL ECOLOGY AND BIOGEOGRAPHY
ISSN	1466-822X
EISSN	1466-8238
英文摘要	Aim Numerous studies have assessed whether species niches are conserved in geographically separated regions. However, most of them were performed on invasive species, with the limitation that such species have likely not yet reached their potential distribution in the invaded region. Here we test the hypothesis of niche conservatism in the entire group of 25 amphitropical desert disjunct plant species, naturally distributed in North and South America but absent in the tropics. We also assessed the influence of ecological (intensity of biotic interactions) and species-specific factors (dispersal ability and adaptation to stress) on species niche differentiation between the two continents. Location North America and South America. Time period Recent. Major taxa studied Plants. Amphitropical desert disjunct species. Methods Species' presence coordinates and five biologically relevant climatic variables were used to quantify niche differentiation of species between continents by means of principal component analysis. Then, structural equation modelling was performed to assess the influence on niche differentiation of proxies for intensity of biotic interactions (habitat net primary productivity), species dispersibility (dispersal mode and plant traits), and adaptation to stress (leaf size). Results Niche shift was detected for 24 out of the 25 species, mostly towards cooler environments in South America (-2.5 degrees C average) with respect to North America. These niche shifts were best explained by the productivity of species' habitats, in particular by the displacement of species' niches away from the more productive and competitive environments of South America. Main conclusions Niche shift seems to be the rule in amphitropical desert plants. Our findings highlight a previously undetected connection between amphitropical disjunct species and macroecological characteristics of the Americas. We show that prevalent environments differ between South and North America, and suggest that associated biotic contexts (mainly competition from widespread tropical and subtropical forests in South America) play a determinant role on species' distribution and niches.
英文关键词	abiotic stress amphitropical disjuncts biotic interactions desert plant species dispersal ability niche dynamics North America South America
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000592257600001
WOS关键词	LONG-DISTANCE DISPERSAL ; DATA SETS MATTER ; CLIMATIC NICHE ; BIOTIC INTERACTIONS ; SHIFTS ; EVOLUTION ; RANGES ; NORTH ; DISTRIBUTIONS ; CONSERVATISM
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/2XILL650/328542
作者单位	[Quiroga, R. Emiliano] Inst Nacl Tecnol Agr INTA, Estn Expt Agr Catamarca, Sumalao, Catamarca, Argentina; [Premoli, Andrea C.] Univ Nacl Comahue, CONICET, INIBIOMA, San Carlos De Bariloche, Rio Negro, Argentina; [Fernandez, Roberto J.] Univ Buenos Aires, Fac Agron, Catedra Ecol, IFEVA,CONICET, Buenos Aires, DF, Argentina
推荐引用方式 GB/T 7714	Quiroga, R. Emiliano,Premoli, Andrea C.,Fernandez, Roberto J.. Niche dynamics in amphitropical desert disjunct plants: Seeking for ecological and species-specific influences[J].
APA	Quiroga, R. Emiliano,Premoli, Andrea C.,&Fernandez, Roberto J..
MLA	Quiroga, R. Emiliano,et al."Niche dynamics in amphitropical desert disjunct plants: Seeking for ecological and species-specific influences".GLOBAL ECOLOGY AND BIOGEOGRAPHY