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Master thesis

Vulnérabilité des forets ontariennes à l'invasion par des espèces végétales exotiques suite à une épidemie d'agrile du frêne

Abstract : The emerald ash borer (EAB), (Agrilus planipennis, Faimair) is a small asian carabid introduced in 2002 in Northern United States. In Southwestern Ontario, this exotic woodboring beetle has already killed several hundred thousand ash trees (Fraxinus spp.). A longterm monitoring study has been set up to evaluate a critical issue for forest management: the impact of understory vegetation response to the massive mortality of ash trees on forest ecosystem functions and services. One key aspect of this project is how landscape (urban and agricultural with different level of forest retention) and forest patch configuration (woodlot or riparian) affect the invasion potential of exotic plant species following EAB outbreak. The use of a trait-based approach shows that exotic plant species possess different characteristics (i.e. trait values) according to the landscape and configuration of the forest. This variability, especially in traits related to competitiveness of the exotic species, may lead to different plant community responses following EAB outbreak. Because urban and riparian forests are more disturbed and more prone to exotic propagule pressure, they are expected to be more vulnerable to exotic plant species invasion. Understanding facilitative interactions between EAB outbreak and exotic plant responses are crucial information for managing and mitigating the loss of these foundation tree species.
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Master thesis
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http://docnum.univ-lorraine.fr/public/BUS_M_2012_LAIGLE_IDALINE.pdf
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https://hal.univ-lorraine.fr/hal-01871537
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Idaline Laigle. Vulnérabilité des forets ontariennes à l'invasion par des espèces végétales exotiques suite à une épidemie d'agrile du frêne. Sciences de l'environnement. 2012. ⟨hal-01871537⟩

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