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24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

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TG4. Biology, ecology and evolution of invasive species

Organizers: Carine Brouat & Arnaud Estoup

Our researches target animal populations (mainly arthropods, nematodes and rodents) which distribution area increases abruptly, further to the introduction in a new ecosystem or an environmental change (climate, natural environment anthropization, etc.), which have important functional / economical / societal impacts in the invaded ecosystems.

We are particularly interested in the following points:

  • describing the history of the invasions : geographical origin, invasion paths, population changes, spatial expanding, etc.
  • highlighting the key factors of the invasion success: diversity and genetic makeup, life history traits, abiotic characteristics of native/invaded ecosystems, interspecific interactions (parasitism, symbiosis, competition),
  • characterizing the selectice processes in intrusive/growing populations (quantitative traits and genetic markers),
  • Characterizing the genomic/epigenomic bases of the observed adaptive changes (phenotype–genotype link),
  • Producing scientific knowledge to identify the risks of invasion, helping in the prevention and control (e.g. support in quarantine measures, biological control).

Examples of intrusive insect species studied at CBGP (© INRA/CBGP)

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Summary of the Asian ladybird's paths of invasion, deduced from genetic markers

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Examples of intrusive rodents studied at CBGP (© IRD/CBGP)

Rattus rattus Madagascar

Rattus rattus, Madagascar

Piégeage rongeurs invasifs Sénégal

Trapping invasive rodents, Senegal

Expérimentations souris invasives Sénégal

Experiments on invasive mice, Senegal

Gerbillus nigeriae

Gerbillus nigeriae