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Relations entre les traits fonctionnels des espèces végétales et leurs fonctions de protection contre l'érosion dans les milieux marneux restaurés de montagne

Abstract : Erosion control and soil retention are listed among the most important ecological services provided by vegetation, but these functions are no longer fulfilled in many environments. In the French Southern Alps, marly lands are subjected to severe hydric erosion that leads to considerable soil losses. Many ecological restoration operations are carried out to restore ecosystem functions and provide long-term erosion control. During the past ten years, the role of plant traits in ecosystem functioning has been a major research topic in ecology. Plant functional traits determine both species response to environmental constraints and species effect on ecosystem processes. Plant traits approach is also interesting in the search for general rules and in ecological modelling, in order to give the results a higher applied value. This PhD comes with this context and aims to better understand the relationships between plant functional traits and both species response to erosive constraints and species effect on soil protection. Species resistance to uprooting and to burial under marly sediment, as well as their functions of soil stabilization and sediment trapping, were studied on herbaceous and woody species in their first stages of development. Results highlighted plant functional traits that mainly influence species response and effect to/on erosion. Plant traits describing root system morphology, such as the percentage of fine roots, have been related to resistance to uprooting and soil reinforcement, whereas growth form and traits describing canopy morphology were determinant in resistance to burial and sediment trapping respectively. This study contributed to deepen our knowledge in restoration ecology applied to mountainous eroded lands and to improve management tools. In particular, results could be used for the diagnosis of land vulnerability to erosion and to predict ecological restoration success
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https://tel.archives-ouvertes.fr/tel-00602804
Contributor : Melanie Burylo <>
Submitted on : Thursday, June 23, 2011 - 2:22:58 PM
Last modification on : Monday, October 19, 2020 - 11:03:57 AM
Long-term archiving on: : Saturday, September 24, 2011 - 2:24:57 AM

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  • HAL Id : tel-00602804, version 1

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Melanie Burylo. Relations entre les traits fonctionnels des espèces végétales et leurs fonctions de protection contre l'érosion dans les milieux marneux restaurés de montagne. Ecologie, Environnement. Université de Grenoble, 2010. Français. ⟨tel-00602804⟩

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