干旱区生态环境知识资源中心(Arid): Slender salamanders (genus Batrachoseps) reveal Southern California to be a center for the diversification, persistence, and introduction of salamander lineages

Arid

DOI	10.7717/peerj.9599
	Slender salamanders (genus Batrachoseps) reveal Southern California to be a center for the diversification, persistence, and introduction of salamander lineages
	Jockusch, Elizabeth L.; Hansen, Robert W.; Fisher, Robert N.; Wake, David B.
通讯作者	Jockusch, EL
来源期刊	PEERJ
ISSN	2167-8359
出版年	2020
卷号	8
英文摘要	Background. The southern California biodiversity hotspot has had a complex geological history, with both plate tectonic forces and sea level changes repeatedly reconfiguring the region, and likely driving both lineage splittings and extinctions. Here we investigate patterns of genetic divergence in two species of slender salamanders (Plethodontidae: Batrachoseps) in this region. The complex geological history in combination with several organismal traits led us to predict that these species harbor multiple ancient mitochondrial lineages endemic to southern California. These species belong to a Glade characterized by fine-scale mitochondrial structure, which has been shown to track ancient splits. Both focal species, Batrachoseps major and B. nigriventris, are relatively widely distributed in southern California, and estimated to have persisted there across millions of years. Recently several extralimital populations of Batrachoseps were found in the San Joaquin Valley of California, a former desert area that has been extensively modified for agriculture. The origins of these populations are unknown, but based on morphology, they are hypothesized to result from human-mediated introductions of B. major. Methods. We sequenced the mitochondrial gene cytochrome b from a geographically comprehensive sampling of the mitochondrial lineages of B. major and B. nigriventris that are endemic to southern California. We used phylogenetic analyses to characterize phylogeographic structure and identify mitochondrial contact zones. We also included the San Joaquin Valley samples to test whether they resulted from introductions. We used a bootstrap resampling approach to compare the strength of isolation-by-distance in both Batrachoseps species and four other salamander species with which they co-occur in southern California. Results. The northern lineage of B. major harbors at least eight deeply differentiated, geographically cohesive mitochondrial subclades. We identify geographic contact between many of these mtDNA lineages and some biogeographic features that are concordant with lineage boundaries. Batrachoseps nigriventris also has multiple deeply differentiated Glades within the region. Comparative analyses highlight the smaller spatial scales over which mitochondrial divergence accumulates in Batrachoseps relative to most other salamander species in southern California. The extralimital populations of Batrachoseps from the San Joaquin Valley are assigned to B. major and are shown to result from at least two independent introductions from different source populations. We also suggest that B. major on Catalina Island, where it is considered native, may be the result of an introduction. Some of the same traits that facilitate the build-up of deep phylogeographic structure in Batrachoseps likely also contribute to its propensity for introductions, and we anticipate that additional introduced populations will be discovered.
英文关键词	Phylogeography Salamander Introductions Southern California Biodiversity hotspot
类型	Article
语种	英语
开放获取类型	DOAJ Gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000559733100003
WOS关键词	JERUSALEM CRICKET ORTHOPTERA ; TARICHA-TOROSA CAUDATA ; ENSATINA-ESCHSCHOLTZII ; COMPARATIVE PHYLOGEOGRAPHY ; EVOLUTIONARY HISTORY ; BAJA-CALIFORNIA ; SIERRA-NEVADA ; PLETHODONTIDAE ; POPULATION ; PATTERNS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
来源机构	University of California, Berkeley
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325623
作者单位	[Jockusch, Elizabeth L.] Univ Connecticut, Dept Ecol & Evolutionary Biol, Storrs, CT 06269 USA; [Jockusch, Elizabeth L.; Hansen, Robert W.; Wake, David B.] Univ Calif Berkeley, Museum Vertebrate Zool, Berkeley, CA 94720 USA; [Fisher, Robert N.] Western Ecol Res Ctr, San Diego Field Stn, San Diego, CA USA; [Wake, David B.] Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720 USA
推荐引用方式 GB/T 7714	Jockusch, Elizabeth L.,Hansen, Robert W.,Fisher, Robert N.,et al. Slender salamanders (genus Batrachoseps) reveal Southern California to be a center for the diversification, persistence, and introduction of salamander lineages[J]. University of California, Berkeley,2020,8.
APA	Jockusch, Elizabeth L.,Hansen, Robert W.,Fisher, Robert N.,&Wake, David B..(2020).Slender salamanders (genus Batrachoseps) reveal Southern California to be a center for the diversification, persistence, and introduction of salamander lineages.PEERJ,8.
MLA	Jockusch, Elizabeth L.,et al."Slender salamanders (genus Batrachoseps) reveal Southern California to be a center for the diversification, persistence, and introduction of salamander lineages".PEERJ 8(2020).