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Master Thesis

Analyse écologique de la répartition de la végétation à partir d'une base de données phytosociologiques : exemple de la végétation méditerranéenne

Abstract : The understanding of plant species and plant community distribution over large area is an important current scientific issue for biodiversity conservation planning and assessing the impacts of environmental change on vegetation distribution. The present study is based on a database of 200 000 phytosociological relevés. It aims to understand the vegetation organization in relation to bioclimatic variables. This work use tools and concepts from graph theory in order to define coherent groups of plant species in the data. On the example of Mediterranean vegetation, indirect and direct ordination analysis was performed in order to study the structuration of groups of plant species in relation to bioclimatic variables. We have shown that graph theory approach and ordinations methods are relevant methods to study the vegetation organization at national scale. The study of Mediterranean vegetation highlighted the gradient organization of plant in relation to the bioclimatic gradients. From theses vegetation gradient, specific plant communities have been identified. The specificity of each method and points to further, especially in order to predictive vegetation mapping are discussed.
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Master Thesis
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Marianne Gerard. Analyse écologique de la répartition de la végétation à partir d'une base de données phytosociologiques : exemple de la végétation méditerranéenne. Sciences agricoles. 2012. ⟨dumas-00773444⟩

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