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Dernière mise à jour : Mai 2018

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Teddy Urvois

Photo Urvois

Teddy URVOIS
Courriel : teddyurvois(at)gmail.com
Sujet : Analyse spatiale de l'invasion de deux scolytes, Xylosandrus crassiusculus et X. compactus, envahissant les écosystèmes méditerranéens
Dates : 1er novembre 2018 – 30 septembre 2021
Encadrement CBGP : C. Kerdelhué
Université :

Xylosandrus crassiusculus et X. compactus sont deux scolytes originaires d'Asie et invasifs sur les continents américain, africain et océanien. Récemment découverts en Europe méditerranéenne (région de Rome en Italie, Slovénie, SE de la France et région de Valence en Espagne), ils ont déjà causé de graves dépérissements du maquis.

Les deux espèces sont haplo-diploïdes, très polyphages et leur biologie favorise une forte consanguinité. Ces scolytes ont une association symbiotique avec un champignon qu'ils transportent, "cultivent" dans les galeries larvaires et dont ils se nourrissent. Un projet Européen LIFE (SamFix: Saving Mediterranean Forests from Invasive Xylosandrus) a démarré en 2018 et vise à comprendre les voies de dispersion des deux espèces et à mettre au point des méthodes de monitoring et de gestion pour protéger les espaces naturels menacés.

Teddy réalise sa thèse à l'Unité de Recherche de Zoologie Forestière à Orléans dans le cadre de ce projet. Il est co-encadré par M.A. Auger-Rozenberg (URZF, Orléans) et C. Kerdelhué. Pendant cette deuxième visite au CBGP, Teddy construira avec Laure Sauné une banque RADseq sur une centaine d'individus de X. compactus afin de tracer génétiquement l'origine des populations européennes invasives, et commencera à s'initier aux analyses de données.