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)
Summary of the Asian ladybird's paths of invasion, deduced from genetic markers
Examples of intrusive rodents studied at CBGP (© IRD/CBGP)