Arid
DOI10.1111/ddi.12506
A novel hotspot of vertebrate endemism and an evolutionary refugium in tropical Australia
Oliver, Paul M.1,2,3; Laver, Rebecca J.3,4; Martins, Felipe De Mello1,2; Pratt, Renae C.1,2; Hunjan, Sumitha4; Moritz, Craig C.1,2
通讯作者Oliver, Paul M.
来源期刊DIVERSITY AND DISTRIBUTIONS
ISSN1366-9516
EISSN1472-4642
出版年2017
卷号23期号:1页码:53-66
英文摘要

AimIn lineages or regions that are rife with morphologically cryptic taxa, hotspots of local endemism may remain overlooked when genetic data are unavailable. Here we examine the genetic diversity and evolutionary origins of lizard communities occurring in a relatively restricted, isolated and heretofore poorly surveyed region of limestone karst in northern Australia.


LocationThe Devonian Reef System (DRS), an iconic range of exposed weathered limestone at the margin of the Australian Arid Zone (AAZ) and Monsoonal Tropics (AMT) in north-west Australia, that is widely recognized for its cultural, geological and palaeontological significance.


MethodsIn collaboration with local landowners, we sampled four different gecko genera at sites spanning the DRS and adjacent biomes. We then used measures of genetic divergence, neutrality tests, Bayesian dating and hierarchical approximate Bayesian computational (HABC) approaches to identify divergent lineages, test for shared biogeographic history and compare patterns of genetic differentiation in lineages with different ecologies (saxicoline, arboreal and terrestrial).


ResultsAmongst saxicoline taxa, we identified 11 genetically divergent lineages that appear to be endemic to the DRS. Generalists and arboreal lineages showed no evidence of endemism in the DRS. Estimated divergence dates and patterns of distribution indicate that endemic lineages have persisted since the Plio-Pleistocene (or even earlier). Taxa in an old endemic Australian Gondwanan radiation showed evidence of longer persistence and isolation than those in radiations with more recent immigrant origins.


Main ConclusionsThe DRS is a heretofore overlooked hotspot of vertebrate endemism and persistence. Areas with distinctive underlying geology that provide microrefugia (such as karst) in tropical regions across the globe are likely important refugia for biodiversity at both ecological and evolutionary scales. They warrant further focused survey efforts (including genetics-based assessments of diversity) and ongoing conservation attention.


英文关键词Australian Monsoonal Tropics cryptic diversity geology lizard saxicoline specialist
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000389944100005
WOS关键词APPROXIMATE BAYESIAN COMPUTATION ; CLAWLESS GECKOS CRENADACTYLUS ; GEHYRA SQUAMATA GEKKONIDAE ; GENUS CYRTODACTYLUS GRAY ; WESTERN-AUSTRALIA ; PHYLOGENETIC ANALYSES ; MOLECULAR PHYLOGENY ; SOUTHERN KIMBERLEY ; MONSOONAL TROPICS ; DNA POLYMORPHISM
WOS类目Biodiversity Conservation ; Ecology
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/198310
作者单位1.Australian Natl Univ, Div Evolut Ecol & Genet, Res Sch Biol, Bldg 116,Daley Rd, Acton, ACT 2601, Australia;
2.Australian Natl Univ, Ctr Biodivers Anal, Bldg 116,Daley Rd, Acton, ACT 2601, Australia;
3.Univ Melbourne, Dept Biosci, Parkville, Vic 3010, Australia;
4.Museum Victoria, Dept Sci, Melbourne, Vic 3001, Australia
推荐引用方式
GB/T 7714
Oliver, Paul M.,Laver, Rebecca J.,Martins, Felipe De Mello,et al. A novel hotspot of vertebrate endemism and an evolutionary refugium in tropical Australia[J],2017,23(1):53-66.
APA Oliver, Paul M.,Laver, Rebecca J.,Martins, Felipe De Mello,Pratt, Renae C.,Hunjan, Sumitha,&Moritz, Craig C..(2017).A novel hotspot of vertebrate endemism and an evolutionary refugium in tropical Australia.DIVERSITY AND DISTRIBUTIONS,23(1),53-66.
MLA Oliver, Paul M.,et al."A novel hotspot of vertebrate endemism and an evolutionary refugium in tropical Australia".DIVERSITY AND DISTRIBUTIONS 23.1(2017):53-66.
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