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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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Institut Sophia Agrobiotech

UMR INRA - Univ. Nice Sophia Antipolis - Cnrs

Le rôle de la dispersion dans la dynamique des expansions poussées / The role of dispersal in the dynamics of pushed expansions

Vendredi 17 Septembre à 11h, salle A010 - Sophia Antipolis - INRAE PACA - Visioconférence

Séminaire scientifique
Dans le cadre de l'animation scientifique de l'ISA, nous avons le plaisir d'avoir Maxime Dahirel de l'équipe BPI qui nous présentera ses travaux.

Participer à la réunion Zoom
ID de réunion : 858 2407 5554
Code secret : 240778

Pour vous connecter depuis un téléphone fixe:
1. Composer le +33 1 8699 5831
2. Entrer l'ID 858 2407 5554 puis #
3. Entrer le code 240778 puis #


Un cadre potentiellement utile pour penser la diversité des dynamiques aux fronts d’expansion lors d’invasions biologiques (ou de déplacements liés au changement climatique) est celui des vagues poussées vs. tirées. Cette théorie prédit que le comportement (vitesse, diversité génétique…) des expansions dépend du degré de densité-dépendance. Alors que les expansions poussées peuvent parfaitement être générées par de la dispersion densité-dépendante (très fréquente dans la nature), la quasi-totalité des études portent sur l’effet Allee. Je présenterai des résultats expérimentaux et de simulations sur la façon dont la dispersion, ses coûts et son évolution influencent la présence et le maintien d’expansions poussées.