The following thesis subject is put in competition 2022 for the attribution of a financing from the Doctoral School of Life Sciences, Health, Agronomy & Environment (SVSAE) of the University Clermont Auvergne. For any information, please contact one of the supervisors.
UMR INRA 547 PIAF Integrative Physics and Physiology of Trees in Fluctuating Environment, Clermont Université
Thesis supervisor : Philippe BALANDIER (DR, INRAE) Co-supervisor : Philippe MALAGOLI (MCU-HDR) Co-supervisor : Marc SAUDREAU (CR, INRAE)
philippe.malagoli@uca.fr, philippe.balandier@inrae.fr, marc.saudreau@inrae.fr
Modeling the effects of tree canopy structure on the availability of water, nutrients and microclimate
Tree canopy structure has a clear influence on resource availability (light, water, nitrogen) in natural or cultivated tree ecosystems. This structure induces emergent meteorological and microclimatic properties that can influence functional interactions between different plant strata. To optimize and predict the evolution of different functions of these tree ecosystems (microclimate, production, resource use efficiency) it is necessary to take into account these multi-stratum interactions. The hypothesis tested would be that there is (are) a tree structure(s) (neither too open nor too closed, tiered) that allow to optimize these different functions under different assumptions of climate forcing. The idea is, based on one or two case studies in the field, to parameterize and validate a model in order to test in silico the effect of different tree structures with increasing levels of complexity. The thesis will rely on the modelling platform Capsis, already used by the team and in which candidate multistratum models already exist but require development.

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