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Mulot, Matthieu

Nom
Mulot, Matthieu
Affiliation principale
Fonction
Ancien.ne collaborateur.trice
Identifiants
https://libra.unine.ch/handle/123456789/671

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  • Publication
    Accès libre
    Effect of simulated climate change on the structure and functioning of Sphagnum peatlands-an experimental and modeling study
    (Neuchâtel : Université de Neuchâtel, Faculté des sciences, 2016)
    Mulot, Matthieu 
    ;
    Mitchell, Edward 
    The main objective of this thesis was to investigate the response of Sphagnum dominated peatland to water table manipulations in an integrative approach. We conceived a mesocosms experiment that simulates artificial peatlands at different water regimes. We first show that our mesocosms behave according to the literature, with respiration and decomposition rates enhanced by the combined effects of water and temperature. We hypothesize that this C cycle dynamic is regulated by microbial activity. To address this question, we investigate the topological change of micro eukaryotic interaction network along the gradient and show that the structure of the network evolves along the gradient, showing a change point around -10 cm. Then we study the functional response of one functional group of micro eukaryotes, the testate amoebae. We show that environmental filtering constrained by manipulated water level promotes traits selection, and that this traits response can be used to mathematically model Hutchinson niche concept. Finally, we demonstrated the phenotypic plasticity on Hyalosphenia papilio, showing that traits selection acts both between species by community replacement, and within species by phenotypic plasticity. We propose a framework to model environmental filtering, integrating all components of this study.