干旱区生态环境知识资源中心(Arid): alpha, beta and gamma-diversity of vascular epiphytes along the climatic gradient of continental Chile

Arid

DOI	10.1080/0028825X.2018.1538050
	alpha, beta and gamma-diversity of vascular epiphytes along the climatic gradient of continental Chile
	Moreno-Chacon, Maria; Saldana, Alfredo
通讯作者	Moreno-Chacon, Maria
来源期刊	NEW ZEALAND JOURNAL OF BOTANY
ISSN	0028-825X
EISSN	1175-8643
出版年	2019
卷号	57 期号:1 页码:18-31
英文摘要	The global diversity of vascular plants markedly decreases from the tropics to temperate zones; however, along the South American climatic gradient from Mediterranean to temperate climates, vascular epiphytes exhibit a secondary pattern in which species richness increases towards temperate rainforest. In this region, large-scale ecological studies have usually not recognised epiphytes as a distinct floristic element, so relationships of epiphyte community composition and diversity with regional climate are poorly understood. We used georeferenced herbarium data to describe the richness (alpha and gamma-diversity) and turnover (beta(tau)-diversity) of vascular epiphytes, and evaluated the relationship of species richness and community composition with climatic variables in the arid, Mediterranean and temperate zones of Chile. Our results indicate that alpha, beta(tau) and gamma-diversity patterns vary widely along the environmental gradient. alpha-diversity has a unimodal distribution curve with maximum values between 38 degrees S and 47 degrees S. In the arid region occupying the northern part of the gradient (17 degrees S-28 degrees S), abrupt changes in species composition (beta(tau)-diversity) reflect the environmental heterogeneity of the zone, where epiphyte occurrence is restricted to isolated sites where water availability depends on fog. In temperate climates further south, where spatial and temporal availability of water is more continuous, species' distributions overlap widely, leading to a decrease in beta tau values. Calculated as the product of the alpha-diversity and beta(tau) values, gamma-diversity increases with latitude, reaching its maximum in the temperate forest region between 38 degrees S and 47 degrees S, in accordance with previous descriptions for vascular epiphytes. The influence of alpha and beta(tau)-diversity on gamma-diversity changes along the gradient: beta(tau)-diversity is more critical in desert and Mediterranean climates, while the contribution of alpha-diversity increases towards temperate climates.
英文关键词	Vascular epiphytes epiphytic ferns temperate forest environmental gradient latitudinal gradient
类型	Article
语种	英语
国家	Chile
收录类别	SCI-E
WOS记录号	WOS:000459815000002
WOS关键词	TEMPERATE RAIN-FOREST ; SPECIES RICHNESS ; BIOLOGICAL COLLECTIONS ; SPATIAL-DISTRIBUTION ; PLANT DIVERSITY ; NORTH-AMERICA ; PATTERNS ; SCALE ; BIODIVERSITY ; COMMUNITIES
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217782
作者单位	Univ Concepcion, Dept Bot, Concepcion, Chile
推荐引用方式 GB/T 7714	Moreno-Chacon, Maria,Saldana, Alfredo. alpha, beta and gamma-diversity of vascular epiphytes along the climatic gradient of continental Chile[J],2019,57(1):18-31.
APA	Moreno-Chacon, Maria,&Saldana, Alfredo.(2019).alpha, beta and gamma-diversity of vascular epiphytes along the climatic gradient of continental Chile.NEW ZEALAND JOURNAL OF BOTANY,57(1),18-31.
MLA	Moreno-Chacon, Maria,et al."alpha, beta and gamma-diversity of vascular epiphytes along the climatic gradient of continental Chile".NEW ZEALAND JOURNAL OF BOTANY 57.1(2019):18-31.