Unveiling the diversification dynamics of Australasian predaceous diving beetles in the Cenozoic.
Identifieur interne : 002672 ( Main/Merge ); précédent : 002671; suivant : 002673Unveiling the diversification dynamics of Australasian predaceous diving beetles in the Cenozoic.
Auteurs : Emmanuel F A. Toussaint [Allemagne] ; Fabien L. Condamine [Allemagne] ; Oliver Hawlitschek [Allemagne] ; Chris H. Watts [Allemagne] ; Nick Porch [Allemagne] ; Lars Hendrich [Allemagne] ; Michael Balke [Allemagne]Source :
- Systematic biology [ 1076-836X ] ; 2015.
Descripteurs français
- KwdFr :
- MESH :
- génétique : Coléoptères, Gènes d'insecte.
- Animaux, Australie, Coléoptères, Fossiles, Phylogénie, Spéciation génétique, Variation génétique.
- Wicri :
- geographic : Australie.
English descriptors
- KwdEn :
- MESH :
- geographic : Australia.
- classification : Beetles.
- genetics : Beetles, Genes, Insect.
- Animals, Fossils, Genetic Speciation, Genetic Variation, Phylogeny.
Abstract
During the Cenozoic, Australia experienced major climatic shifts that have had dramatic ecological consequences for the modern biota. Mesic tropical ecosystems were progressively restricted to the coasts and replaced by arid-adapted floral and faunal communities. Whilst the role of aridification has been investigated in a wide range of terrestrial lineages, the response of freshwater clades remains poorly investigated. To gain insights into the diversification processes underlying a freshwater radiation, we studied the evolutionary history of the Australasian predaceous diving beetles of the tribe Hydroporini (147 described species). We used an integrative approach including the latest methods in phylogenetics, divergence time estimation, ancestral character state reconstruction, and likelihood-based methods of diversification rate estimation. Phylogenies and dating analyses were reconstructed with molecular data from seven genes (mitochondrial and nuclear) for 117 species (plus 12 outgroups). Robust and well-resolved phylogenies indicate a late Oligocene origin of Australasian Hydroporini. Biogeographic analyses suggest an origin in the East Coast region of Australia, and a dynamic biogeographic scenario implying dispersal events. The group successfully colonized the tropical coastal regions carved by a rampant desertification, and also colonized groundwater ecosystems in Central Australia. Diversification rate analyses suggest that the ongoing aridification of Australia initiated in the Miocene contributed to a major wave of extinctions since the late Pliocene probably attributable to an increasing aridity, range contractions and seasonally disruptions resulting from Quaternary climatic changes. When comparing subterranean and epigean genera, our results show that contrasting mechanisms drove their diversification and therefore current diversity pattern. The Australasian Hydroporini radiation reflects a combination of processes that promoted both diversification, resulting from new ecological opportunities driven by initial aridification, and a subsequent loss of mesic adapted diversity due to increasing aridity.
DOI: 10.1093/sysbio/syu067
PubMed: 25173563
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Watts</name><affiliation wicri:level="3"><nlm:affiliation>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich, Germany.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich</wicri:regionArea><placeName><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Haute-Bavière</region><settlement type="city">Munich</settlement></placeName></affiliation></author><author><name sortKey="Porch, Nick" sort="Porch, Nick" uniqKey="Porch N" first="Nick" last="Porch">Nick Porch</name><affiliation wicri:level="3"><nlm:affiliation>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich, Germany.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich</wicri:regionArea><placeName><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Haute-Bavière</region><settlement type="city">Munich</settlement></placeName></affiliation></author><author><name sortKey="Hendrich, Lars" sort="Hendrich, Lars" uniqKey="Hendrich L" first="Lars" last="Hendrich">Lars Hendrich</name><affiliation wicri:level="3"><nlm:affiliation>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich, Germany.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich</wicri:regionArea><placeName><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Haute-Bavière</region><settlement type="city">Munich</settlement></placeName></affiliation></author><author><name sortKey="Balke, Michael" sort="Balke, Michael" uniqKey="Balke M" first="Michael" last="Balke">Michael Balke</name><affiliation wicri:level="3"><nlm:affiliation>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich, Germany. SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich, Germany.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich, Germany. SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich</wicri:regionArea><placeName><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Haute-Bavière</region><settlement type="city">Munich</settlement></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2015">2015</date><idno type="RBID">pubmed:25173563</idno><idno type="pmid">25173563</idno><idno type="doi">10.1093/sysbio/syu067</idno><idno type="wicri:Area/PubMed/Corpus">003202</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">003202</idno><idno type="wicri:Area/PubMed/Curation">003092</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">003092</idno><idno type="wicri:Area/PubMed/Checkpoint">003092</idno><idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">003092</idno><idno type="wicri:Area/Ncbi/Merge">001D57</idno><idno type="wicri:Area/Ncbi/Curation">001D57</idno><idno type="wicri:Area/Ncbi/Checkpoint">001D57</idno><idno type="wicri:Area/Main/Merge">002672</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Unveiling the diversification dynamics of Australasian predaceous diving beetles in the Cenozoic.</title><author><name sortKey="Toussaint, Emmanuel F A" sort="Toussaint, Emmanuel F A" uniqKey="Toussaint E" first="Emmanuel F A" last="Toussaint">Emmanuel F A. Toussaint</name><affiliation wicri:level="3"><nlm:affiliation>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich, Germany. Toussaint@zsm.mwn.de.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich</wicri:regionArea><placeName><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Haute-Bavière</region><settlement type="city">Munich</settlement></placeName></affiliation></author><author><name sortKey="Condamine, Fabien L" sort="Condamine, Fabien L" uniqKey="Condamine F" first="Fabien L" last="Condamine">Fabien L. Condamine</name><affiliation wicri:level="3"><nlm:affiliation>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich, Germany.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich</wicri:regionArea><placeName><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Haute-Bavière</region><settlement type="city">Munich</settlement></placeName></affiliation></author><author><name sortKey="Hawlitschek, Oliver" sort="Hawlitschek, Oliver" uniqKey="Hawlitschek O" first="Oliver" last="Hawlitschek">Oliver Hawlitschek</name><affiliation wicri:level="3"><nlm:affiliation>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich, Germany.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich</wicri:regionArea><placeName><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Haute-Bavière</region><settlement type="city">Munich</settlement></placeName></affiliation></author><author><name sortKey="Watts, Chris H" sort="Watts, Chris H" uniqKey="Watts C" first="Chris H" last="Watts">Chris H. Watts</name><affiliation wicri:level="3"><nlm:affiliation>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich, Germany.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich</wicri:regionArea><placeName><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Haute-Bavière</region><settlement type="city">Munich</settlement></placeName></affiliation></author><author><name sortKey="Porch, Nick" sort="Porch, Nick" uniqKey="Porch N" first="Nick" last="Porch">Nick Porch</name><affiliation wicri:level="3"><nlm:affiliation>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich, Germany.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich</wicri:regionArea><placeName><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Haute-Bavière</region><settlement type="city">Munich</settlement></placeName></affiliation></author><author><name sortKey="Hendrich, Lars" sort="Hendrich, Lars" uniqKey="Hendrich L" first="Lars" last="Hendrich">Lars Hendrich</name><affiliation wicri:level="3"><nlm:affiliation>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich, Germany.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich</wicri:regionArea><placeName><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Haute-Bavière</region><settlement type="city">Munich</settlement></placeName></affiliation></author><author><name sortKey="Balke, Michael" sort="Balke, Michael" uniqKey="Balke M" first="Michael" last="Balke">Michael Balke</name><affiliation wicri:level="3"><nlm:affiliation>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich, Germany. SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich, Germany.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich, Germany. SNSB-Bavarian State Collection of Zoology, Münchhausenstraße 21, 81247 Munich, Germany; CNRS, UMR 7641 Centre de Mathématiques Appliquées (Ecole Polytechnique), Route de Saclay, 91128 Palaiseau cedex, France; South Australian Museum, Adelaide, South Australia, Australia; Centre for Integrated Ecology & School of Life and Environmental Sciences, Deakin University, 221 Burwood Highway, Burwood, Victoria 3125, Australia; and GeoBioCenter, Ludwig-Maximilians University, Munich</wicri:regionArea><placeName><region type="land" nuts="1">Bavière</region><region type="district" nuts="2">District de Haute-Bavière</region><settlement type="city">Munich</settlement></placeName></affiliation></author></analytic><series><title level="j">Systematic biology</title><idno type="eISSN">1076-836X</idno><imprint><date when="2015" type="published">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Animals</term><term>Australia</term><term>Beetles (classification)</term><term>Beetles (genetics)</term><term>Fossils</term><term>Genes, Insect (genetics)</term><term>Genetic Speciation</term><term>Genetic Variation</term><term>Phylogeny</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Animaux</term><term>Australie</term><term>Coléoptères ()</term><term>Coléoptères (génétique)</term><term>Fossiles</term><term>Gènes d'insecte (génétique)</term><term>Phylogénie</term><term>Spéciation génétique</term><term>Variation génétique</term></keywords><keywords scheme="MESH" type="geographic" xml:lang="en"><term>Australia</term></keywords><keywords scheme="MESH" qualifier="classification" xml:lang="en"><term>Beetles</term></keywords><keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Beetles</term><term>Genes, Insect</term></keywords><keywords scheme="MESH" qualifier="génétique" xml:lang="fr"><term>Coléoptères</term><term>Gènes d'insecte</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Animals</term><term>Fossils</term><term>Genetic Speciation</term><term>Genetic Variation</term><term>Phylogeny</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Animaux</term><term>Australie</term><term>Coléoptères</term><term>Fossiles</term><term>Phylogénie</term><term>Spéciation génétique</term><term>Variation génétique</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Australie</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">During the Cenozoic, Australia experienced major climatic shifts that have had dramatic ecological consequences for the modern biota. Mesic tropical ecosystems were progressively restricted to the coasts and replaced by arid-adapted floral and faunal communities. Whilst the role of aridification has been investigated in a wide range of terrestrial lineages, the response of freshwater clades remains poorly investigated. To gain insights into the diversification processes underlying a freshwater radiation, we studied the evolutionary history of the Australasian predaceous diving beetles of the tribe Hydroporini (147 described species). We used an integrative approach including the latest methods in phylogenetics, divergence time estimation, ancestral character state reconstruction, and likelihood-based methods of diversification rate estimation. Phylogenies and dating analyses were reconstructed with molecular data from seven genes (mitochondrial and nuclear) for 117 species (plus 12 outgroups). Robust and well-resolved phylogenies indicate a late Oligocene origin of Australasian Hydroporini. Biogeographic analyses suggest an origin in the East Coast region of Australia, and a dynamic biogeographic scenario implying dispersal events. The group successfully colonized the tropical coastal regions carved by a rampant desertification, and also colonized groundwater ecosystems in Central Australia. Diversification rate analyses suggest that the ongoing aridification of Australia initiated in the Miocene contributed to a major wave of extinctions since the late Pliocene probably attributable to an increasing aridity, range contractions and seasonally disruptions resulting from Quaternary climatic changes. When comparing subterranean and epigean genera, our results show that contrasting mechanisms drove their diversification and therefore current diversity pattern. The Australasian Hydroporini radiation reflects a combination of processes that promoted both diversification, resulting from new ecological opportunities driven by initial aridification, and a subsequent loss of mesic adapted diversity due to increasing aridity.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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