Défense de thèse

Soutenance de thèse de Flavien Collart

Info

Dates

15 juin 2021

Location

Visioconférence

Schedule

16h00

Fig. 4: Overview of workflow implemented in the present study to integrate mechanistic dispersal kernels and correlative climatic suitability models in simulations of future wind-dispersed species distributions under climate change.
From : Zanatta, F., Engler, R., Collart, F. et al. Bryophytes are predicted to lag behind future climate change despite their high dispersal capacities. Nat Commun 11, 5601 (2020). https://doi.org/10.1038/s41467-020-19410-8

Le mardi 15 juin 2021, Flavien COLLART présentera l'examen en vue de l’obtention du grade académique de Docteur en Sciences (Collège de doctorat en Biologie des organismes et écologie) sous la direction de Alain VANDERPOORTEN et Antoine GUISAN.

Cette épreuve consistera en la défense publique d’une dissertation intitulée :

« Predicting the dynamics of range shifts under climate change: assumptions and applications to the European bryophyte flora ».

Résumé

Climate change has and will have a dramatic impact on species ranges. For instance, about 20% of land plant species are threatened with extinction in the future, with major consequences on human food resources and health. In this context, Species distribution models (SDMs) offer an appealing framework to test the potential effects of climate change on species ranges. These techniques however rely on two main assumptions: (I) the ecological niche remains constant through space and time (niche conservatism) and (II) unlimited dispersal capacities. For this thesis, we focused on bryophytes, whose ecophysiological characteristics make them excellent candidates to study the impact of climate change. The primary goal of the present thesis was to determine the impact of climate change on bryophytes using an ecological modelling approach. To this aim, we first assessed what is the appropriate taxonomic level to implement niche models and tested the niche conservatism hypothesis in the group. We then developed a newly designed model of dispersal by wind in the context of changing climate and presented an example of application in the case of the European flora.

Le Jury sera composé de :

M. J.-C. PLUMIER (Président), Mme et MM. S. DELLICOUR (ULB), A. GUISAN (Université de Lausanne) (Co-promoteur), N. MAGAIN (Secrétaire), J. PATINO LLORENTE (Universidad de La Laguna), A. SALCES CASTELLANO, A. VANDERPOORTEN (Promoteur).

iconeInfo En raison de l’épidémie du coronavirus, cette défense de thèse se fera en visioconférence via Lifesize.
Le lien public pour accéder à la défense est :
Lien : https://call.lifesizecloud.com/9275062
Code : 47129