干旱区生态环境知识资源中心(Arid): Plant life at the dry limit-Spatial patterns of floristic diversity and composition around the hyperarid core of the Atacama Desert

Arid

DOI	10.1371/journal.pone.0233729
	Plant life at the dry limit-Spatial patterns of floristic diversity and composition around the hyperarid core of the Atacama Desert
	Ruhm, Jonathan 1; Boehnert, Tim 1; Weigend, Maximilian 1; Merklinger, Felix F.1; Stoll, Alexandra 2,3; Quandt, Dietmar 1,4; Luebert, Federico 1,5
通讯作者	Luebert, Federico
来源期刊	PLOS ONE
ISSN	1932-6203
出版年	2020
卷号	15 期号:5
英文摘要	Extreme arid conditions in the Atacama Desert in northern Chile have created a unique vegetation almost entirely restricted to the desert margins along the coast of the Pacific Ocean and the Andean range. In this study we provide data on the desert vegetation along elevational gradients at four localities from the western Andean slopes, between 19 degrees and 21 degrees S. Additionally, zonation of floristic data was explored. Three altitudinal zones could be classified and described in detail for each locality. Conspicuously divergent floras in the Atacama Desert have been recorded in the coastal lomas formations' and in the Andean desert vegetation, separated by a narrow band of absolute desert. In this study, we investigate the floristic relationships between both regions by implementing similarity analyses for 21 localities from the coastal and Andean deserts in northern Chile. Our results show a drastic east-west divergence in pairwise floristic similarity, which is in stark contrast to a weaker north-south divergence. A biotic barrier, preventing plant exchange from east to west and vice versa, imposed by the hyperarid conditions of the absolute desert, is one possible explanation for this finding. Moreover, the coastal and Andean deserts likely represent ecologically divergent habitats, e.g., in rainfall seasonality. Essential differences in factors determining plant life between both regions have probably contributed to a divergent evolution of the floras. Both explanations ecological divergence and ecogeographical isolation are not mutually exclusive, but likely complementary. We also combined floristic data from northern Chile and southern Peru. Similarity analyses of this combined dataset provide first floristic evidence for the existence of a biotic north-south corridor along the western slope of the Andes. Sub-Andean distributions of several species are discussed in the light of floristic connectivity between the Peruvian and Chilean Andean floristic clusters.
类型	Article
语种	英语
国家	Germany ; Chile
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000537552800155
WOS关键词	NORTHERN CHILE ; VEGETATION ; PRECIPITATION ; TARAPACA ; HISTORY ; CLIMATE ; ARIDITY ; ORIGIN
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319190
作者单位	1.Univ Bonn, Nees Inst Biodivers Plants, Bonn, Germany; 2.CEAZA, Ctr Estudios Avanzados Zonas Aridas, La Serena, Chile; 3.Univ La Serena, Inst Invest Multidisciplinar Ciencia & Tecnol, La Serena, Chile; 4.AG ETX, Leibniz Inst Plant Genet & Crop Plant Res IPK, Gatersleben, Germany; 5.Univ Chile, Dept Silviculture & Conservac Nat, Santiago, Chile
推荐引用方式 GB/T 7714	Ruhm, Jonathan,Boehnert, Tim,Weigend, Maximilian,et al. Plant life at the dry limit-Spatial patterns of floristic diversity and composition around the hyperarid core of the Atacama Desert[J],2020,15(5).
APA	Ruhm, Jonathan.,Boehnert, Tim.,Weigend, Maximilian.,Merklinger, Felix F..,Stoll, Alexandra.,...&Luebert, Federico.(2020).Plant life at the dry limit-Spatial patterns of floristic diversity and composition around the hyperarid core of the Atacama Desert.PLOS ONE,15(5).
MLA	Ruhm, Jonathan,et al."Plant life at the dry limit-Spatial patterns of floristic diversity and composition around the hyperarid core of the Atacama Desert".PLOS ONE 15.5(2020).