Mitochondrial Phylogenomics Resolves the Global Spread of Higher Termites, Ecosystem Engineers of the Tropics.
Identifieur interne : 000797 ( Main/Exploration ); précédent : 000796; suivant : 000798Mitochondrial Phylogenomics Resolves the Global Spread of Higher Termites, Ecosystem Engineers of the Tropics.
Auteurs : Thomas Bourguignon [Singapour] ; Nathan Lo [Australie] ; Jan Šobotník [République tchèque] ; Simon Y W. Ho [Australie] ; Naeem Iqbal [Pakistan] ; Eric Coissac [France] ; Maria Lee [Singapour] ; Martin M. Jendryka [Singapour] ; David Sillam-Dussès [France] ; Barbora Krížková [République tchèque] ; Yves Roisin [Belgique] ; Theodore A. Evans [Singapour]Source :
- Molecular biology and evolution [ 1537-1719 ] ; 2017.
Descripteurs français
- KwdFr :
- MESH :
- croissance et développement : Isoptera.
- génétique : ADN mitochondrial, Isoptera, Mitochondries.
- Animaux, Espèce introduite, Forêt pluviale, Génome mitochondrial, Phylogénie, Phylogéographie, Répartition des animaux, Écosystème.
English descriptors
- KwdEn :
- MESH :
- chemical , genetics : DNA, Mitochondrial.
- genetics : Isoptera, Mitochondria.
- growth & development : Isoptera.
- methods : Phylogeography.
- Animal Distribution, Animals, Ecosystem, Genome, Mitochondrial, Introduced Species, Phylogeny, Rainforest.
Abstract
The higher termites (Termitidae) are keystone species and ecosystem engineers. They have exceptional biomass and play important roles in decomposition of dead plant matter, in soil manipulation, and as the primary food for many animals, especially in the tropics. Higher termites are most diverse in rainforests, with estimated origins in the late Eocene (∼54 Ma), postdating the breakup of Pangaea and Gondwana when most continents became separated. Since termites are poor fliers, their origin and spread across the globe requires alternative explanation. Here, we show that higher termites originated 42-54 Ma in Africa and subsequently underwent at least 24 dispersal events between the continents in two main periods. Using phylogenetic analyses of mitochondrial genomes from 415 species, including all higher termite taxonomic and feeding groups, we inferred 10 dispersal events to South America and Asia 35-23 Ma, coinciding with the sharp decrease in global temperature, sea level, and rainforest cover in the Oligocene. After global temperatures increased, 23-5 Ma, there was only one more dispersal to South America but 11 to Asia and Australia, and one dispersal back to Africa. Most of these dispersal events were transoceanic and might have occurred via floating logs. The spread of higher termites across oceans was helped by the novel ecological opportunities brought about by environmental and ecosystem change, and led termites to become one of the few insect groups with specialized mammal predators. This has parallels with modern invasive species that have been able to thrive in human-impacted ecosystems.
DOI: 10.1093/molbev/msw253
PubMed: 28025274
Affiliations:
- Australie, Belgique, France, Pakistan, République tchèque, Singapour
- Auvergne-Rhône-Alpes, Bohême centrale, Nouvelle-Galles du Sud, Rhône-Alpes, Région de Bruxelles-Capitale
- Bruxelles, Grenoble, Prague, Sydney
- Université de Sydney, Université libre de Bruxelles, Université nationale de Singapour
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Le document en format XML
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<front><div type="abstract" xml:lang="en">The higher termites (Termitidae) are keystone species and ecosystem engineers. They have exceptional biomass and play important roles in decomposition of dead plant matter, in soil manipulation, and as the primary food for many animals, especially in the tropics. Higher termites are most diverse in rainforests, with estimated origins in the late Eocene (∼54 Ma), postdating the breakup of Pangaea and Gondwana when most continents became separated. Since termites are poor fliers, their origin and spread across the globe requires alternative explanation. Here, we show that higher termites originated 42-54 Ma in Africa and subsequently underwent at least 24 dispersal events between the continents in two main periods. Using phylogenetic analyses of mitochondrial genomes from 415 species, including all higher termite taxonomic and feeding groups, we inferred 10 dispersal events to South America and Asia 35-23 Ma, coinciding with the sharp decrease in global temperature, sea level, and rainforest cover in the Oligocene. After global temperatures increased, 23-5 Ma, there was only one more dispersal to South America but 11 to Asia and Australia, and one dispersal back to Africa. Most of these dispersal events were transoceanic and might have occurred via floating logs. The spread of higher termites across oceans was helped by the novel ecological opportunities brought about by environmental and ecosystem change, and led termites to become one of the few insect groups with specialized mammal predators. This has parallels with modern invasive species that have been able to thrive in human-impacted ecosystems.</div>
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<name sortKey="Ho, Simon Y W" sort="Ho, Simon Y W" uniqKey="Ho S" first="Simon Y W" last="Ho">Simon Y W. Ho</name>
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<country name="République tchèque"><region name="Bohême centrale"><name sortKey="Sobotnik, Jan" sort="Sobotnik, Jan" uniqKey="Sobotnik J" first="Jan" last="Šobotník">Jan Šobotník</name>
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<name sortKey="Krizkova, Barbora" sort="Krizkova, Barbora" uniqKey="Krizkova B" first="Barbora" last="Krížková">Barbora Krížková</name>
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<country name="Pakistan"><noRegion><name sortKey="Iqbal, Naeem" sort="Iqbal, Naeem" uniqKey="Iqbal N" first="Naeem" last="Iqbal">Naeem Iqbal</name>
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<country name="France"><region name="Auvergne-Rhône-Alpes"><name sortKey="Coissac, Eric" sort="Coissac, Eric" uniqKey="Coissac E" first="Eric" last="Coissac">Eric Coissac</name>
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<name sortKey="Sillam Dusses, David" sort="Sillam Dusses, David" uniqKey="Sillam Dusses D" first="David" last="Sillam-Dussès">David Sillam-Dussès</name>
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<country name="Belgique"><region name="Région de Bruxelles-Capitale"><name sortKey="Roisin, Yves" sort="Roisin, Yves" uniqKey="Roisin Y" first="Yves" last="Roisin">Yves Roisin</name>
</region>
</country>
</tree>
</affiliations>
</record>
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