干旱区生态环境知识资源中心(Arid): Welwitschia: Phylogeography of a living fossil, diversified within a desert refuge

Arid

DOI	10.1038/s41598-021-81150-6
	Welwitschia: Phylogeography of a living fossil, diversified within a desert refuge
	Juergens, Norbert; Oncken, Imke; Oldeland, Jens; Gunter, Felicitas; Rudolph, Barbara
通讯作者	Jurgens, N (corresponding author), Univ Hamburg, Inst Plant Sci & Microbiol, Team Biodivers Evolut & Ecol Plants BEE, Ohnhorststr 18, D-22609 Hamburg, Germany.
来源期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
出版年	2021
卷号	11 期号:1
英文摘要	Welwitschia mirabilis is one of the most extraordinary plant species on earth. With a fossil record of 112 My and phylogenetically isolated within the order Gnetales, the monotypic genus Welwitschia has survived only in the northern Namib Desert in Angola and Namibia. Despite its iconic role, the biogeography, ecological niche, and evolutionary history of the species remain poorly understood. Here we present the first comprehensive map of the strongly disjunct species range, and we explore the genetic relationships among all range fragments based on six SSR markers. We also assess the variation of the environmental niche and habitat preference. Our results confirm genetic divergence, which is consistent with the hypothetical existence of two subspecies within Welwitschia. We identify an efficient geographical barrier separating two gene pools at 18.7 degrees S in northern Namibia. We also identify further diversification within each of the two subspecies, with several different gene pools in ten isolated range fragments. Given the presence of well-isolated populations with unique gene pools and the association with different bioclimatic variables, rock types, and habitats within arid river catchments, we can hypothesize that the present intraspecific diversity may have evolved at least in part within the present refuge of the northern Namib Desert.
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000668347900023
WOS关键词	POPULATION-STRUCTURE ; NAMIB DESERT ; MIRABILIS ; INFERENCE
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/2XILL650/351714
作者单位	[Juergens, Norbert; Oncken, Imke; Oldeland, Jens; Gunter, Felicitas; Rudolph, Barbara] Univ Hamburg, Inst Plant Sci & Microbiol, Team Biodivers Evolut & Ecol Plants BEE, Ohnhorststr 18, D-22609 Hamburg, Germany
推荐引用方式 GB/T 7714	Juergens, Norbert,Oncken, Imke,Oldeland, Jens,et al. Welwitschia: Phylogeography of a living fossil, diversified within a desert refuge[J],2021,11(1).
APA	Juergens, Norbert,Oncken, Imke,Oldeland, Jens,Gunter, Felicitas,&Rudolph, Barbara.(2021).Welwitschia: Phylogeography of a living fossil, diversified within a desert refuge.SCIENTIFIC REPORTS,11(1).
MLA	Juergens, Norbert,et al."Welwitschia: Phylogeography of a living fossil, diversified within a desert refuge".SCIENTIFIC REPORTS 11.1(2021).