Arid
DOI10.1016/j.ympev.2012.06.025
Diversification in North American arid lands: Niche conservatism, divergence and expansion of habitat explain speciation in the genus Ephedra
Loera, Israel1; Sosa, Victoria1; Ickert-Bond, Stefanie M.2
通讯作者Sosa, Victoria
来源期刊MOLECULAR PHYLOGENETICS AND EVOLUTION
ISSN1055-7903
EISSN1095-9513
出版年2012
卷号65期号:2页码:437-450
英文摘要

A lineage of 12 arid land shrubby species in the gymnosperm genus Ephedra (Gnetales) from North America is used to evaluate the influence of climate on speciation. With a long evolutionary history, and a well documented fossil record this lineage is an ideal model for understanding the process of speciation under a niche conservatism scenario. Using seven DNA molecular markers, Bayesian inference is carried out to uncover sister species and to estimate time of divergence of the lineages. Ecological niche models are generated for four parapatric and sympatric sister species and two analyses of niche evolution are performed, one based on ecological niche models and another using raw data and multivariate analysis. As previous analyses suggest, the diversification of North America Ephedra species may be the result of a recent secondary radiation. Both parapatric and sympatric species diverged mostly in a scenario of climatic niche conservatism. However, we also found strong evidence for niche divergence for one of the sister species pairs (E. californica-E. trifurca). Moreover, the multivariate analysis found environmental differences for some variables between sister species. The estimated divergence time of three pairs of sister species distributed in southwestern North America (E. cutleri-E. aspera, E. californica-E. trifurca and E. torreyana-E. viridis) is inferred to have occurred in the Late Miocene to Pliocene and for the sister species pair E. antisyphilitica-E. coryi distributed in the southern United States and northeastern Mexico, it was inferred from the Pliocene to Pleistocene. The orogenetic and climatic changes documented for these regions related to expansion of arid lands, may have contributed to the diversification in North American Ephedra, rather than adaptations to new climatic conditions. (C) 2012 Elsevier Inc. All rights reserved.


英文关键词Ephedra Gnetales Niche conservatism North American arid lands Secondary radiation Speciation
类型Article
语种英语
国家Mexico ; USA
收录类别SCI-E
WOS记录号WOS:000309636200008
WOS关键词PREDICTING SPECIES DISTRIBUTIONS ; CHLOROPLAST DNA ; PHYLOGENETIC-RELATIONSHIPS ; ECOLOGICAL SPECIATION ; EVOLUTIONARY HISTORY ; NEOGENE VICARIANCE ; MOLECULAR EVIDENCE ; NONCODING REGIONS ; UNIVERSAL PRIMERS ; GNETALES
WOS类目Biochemistry & Molecular Biology ; Evolutionary Biology ; Genetics & Heredity
WOS研究方向Biochemistry & Molecular Biology ; Evolutionary Biology ; Genetics & Heredity
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/174101
作者单位1.Inst Ecol AC, Xalapa 91000, Veracruz, Mexico;
2.Univ Alaska Fairbanks, Univ Alaska Museum, Dept Biol & Wildlife, Fairbanks, AK 99775 USA
推荐引用方式
GB/T 7714
Loera, Israel,Sosa, Victoria,Ickert-Bond, Stefanie M.. Diversification in North American arid lands: Niche conservatism, divergence and expansion of habitat explain speciation in the genus Ephedra[J],2012,65(2):437-450.
APA Loera, Israel,Sosa, Victoria,&Ickert-Bond, Stefanie M..(2012).Diversification in North American arid lands: Niche conservatism, divergence and expansion of habitat explain speciation in the genus Ephedra.MOLECULAR PHYLOGENETICS AND EVOLUTION,65(2),437-450.
MLA Loera, Israel,et al."Diversification in North American arid lands: Niche conservatism, divergence and expansion of habitat explain speciation in the genus Ephedra".MOLECULAR PHYLOGENETICS AND EVOLUTION 65.2(2012):437-450.
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