Arid
DOI10.1186/s12862-014-0187-y
Thermal niche evolution and geographical range expansion in a species complex of western Mediterranean diving beetles
Hidalgo-Galiana, Amparo1; Sanchez-Fernandez, David1; Bilton, David T.2; Cieslak, Alexandra1; Ribera, Ignacio1
通讯作者Hidalgo-Galiana, Amparo
来源期刊BMC EVOLUTIONARY BIOLOGY
ISSN1471-2148
出版年2014
卷号14
英文摘要

Background: Species thermal requirements are one of the principal determinants of their ecology and biogeography, although our understanding of the interplay between these factors is limited by the paucity of integrative empirical studies. Here we use empirically collected thermal tolerance data in combination with molecular phylogenetics/phylogeography and ecological niche modelling to study the evolution of a clade of three western Mediterranean diving beetles, the Agabus brunneus complex.


Results: The preferred mitochondrial DNA topology recovered A. ramblae (North Africa, east Iberia and Balearic islands) as paraphyletic, with A. brunneus (widespread in the southwestern Mediterranean) and A. rufulus (Corsica and Sardinia) nested within it, with an estimated origin between 0.60-0.25 Ma. All three species were, however, recovered as monophyletic using nuclear DNA markers. A Bayesian skyline plot suggested demographic expansion in the clade at the onset of the last glacial cycle. The species thermal tolerances differ significantly, with A. brunneus able to tolerate lower temperatures than the other taxa. The climatic niche of the three species also differs, with A. ramblae occupying more arid and seasonal areas, with a higher minimum temperature in the coldest month. The estimated potential distribution for both A. brunneus and A. ramblae was most restricted in the last interglacial, becoming increasingly wider through the last glacial and the Holocene.


Conclusions: The A. brunneus complex diversified in the late Pleistocene, most likely in south Iberia after colonization from Morocco. Insular forms did not differentiate substantially in morphology or ecology, but A. brunneus evolved a wider tolerance to cold, which appeared to have facilitated its geographic expansion. Both A. brunneus and A. ramblae expanded their ranges during the last glacial, although they have not occupied areas beyond their LGM potential distribution except for isolated populations of A. brunneus in France and England. On the islands and possibly Tunisia secondary contact between A. brunneus and A. ramblae or A. rufulus has resulted in introgression. Our work highlights the complex dynamics of speciation and range expansions within southern areas during the last glacial cycle, and points to the often neglected role of North Africa as a source of European biodiversity.


英文关键词Thermal niche evolution Cold tolerance Demographic expansion Dytiscidae Western Mediterranean
类型Article
语种英语
国家Spain ; England
收录类别SCI-E
WOS记录号WOS:000342589000001
WOS关键词MOLECULAR CLOCK ; INTEGRATING PHYLOGEOGRAPHY ; BIODIVERSITY CONSERVATION ; GENETIC CONSEQUENCES ; MITOCHONDRIAL-DNA ; BRUNNEUS GROUP ; COLEOPTERA ; CLIMATE ; DYTISCIDAE ; PATTERNS
WOS类目Evolutionary Biology ; Genetics & Heredity
WOS研究方向Evolutionary Biology ; Genetics & Heredity
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/181155
作者单位1.Univ Pompeu Fabra, CSIC, Inst Evolutionary Biol, Barcelona 08003, Spain;
2.Univ Plymouth, Marine Biol & Ecol Res Ctr, Plymouth PL4 8AA, Devon, England
推荐引用方式
GB/T 7714
Hidalgo-Galiana, Amparo,Sanchez-Fernandez, David,Bilton, David T.,et al. Thermal niche evolution and geographical range expansion in a species complex of western Mediterranean diving beetles[J],2014,14.
APA Hidalgo-Galiana, Amparo,Sanchez-Fernandez, David,Bilton, David T.,Cieslak, Alexandra,&Ribera, Ignacio.(2014).Thermal niche evolution and geographical range expansion in a species complex of western Mediterranean diving beetles.BMC EVOLUTIONARY BIOLOGY,14.
MLA Hidalgo-Galiana, Amparo,et al."Thermal niche evolution and geographical range expansion in a species complex of western Mediterranean diving beetles".BMC EVOLUTIONARY BIOLOGY 14(2014).
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