Marion Javal

Ongoing climate change, combined with the ever-increasing worldwide movement of goods and people, is driving plant and animal species out of their native range. These species can have major repercussions on biodiversity, ecosystem balance and human activities. Insects are the most diverse group in terms of both species numbers and ecosystem functions. They are also the group most represented among invasive animal species. Faced with the current challenges posed by global change, it is essential to characterize and understand how these invasive phenomena work, in order to anticipate their consequences on ecosystems in the short, medium and long term.

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All my research experience has led me to question the response of insect populations to changes in their environment in a context of invasion. My work has been structured around three main questions corresponding to three fundamental aspects of a biological insect invasion:

• What is the history of the invasion and the dynamics of the invading populations ?

• What are the possible responses of these insects to changes in their abiotic environment at different stages of the invasion ?

• How do the populations integrate into their ecosystem of introduction ?

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My research experience in Europe, Asia and Africa has enabled me to apply multiple approaches, both experimental and field-based. They enable me to study, in an integrative way, the processes involved in the invasiveness of insect populations. The mechanisms identified can be extrapolated to anticipate the maintenance of insect populations in the face of anthropogenic modifications to their environment.

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Examples of projects :