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Conséquences des invasions végétales sur le fonctionnement des écosystèmes riverains fluviaux

Abstract : The objective of this work is to evaluate plant species origin importance for biological invasion consequences, through the analysis of the influence of native and exotic dominant plant species for ecosystem functioning. Five pairs of native dominant species (Agrostis stolonifera, Rubus caesius, Populus nigra, Urtica dioica et Salix alba) and exotic invasive species (Paspalum distichum, Fallopia japonica, Buddleja davidii, Impatiens glandulifera et Acer negundo) were compared for litter breakdown process and primary production. A more detailed analysis evaluates the consequences of A. negundo invasion for riparian forests. Our results indicate that the lack of coevolution between exotic species and the organisms of recipient areas has little implications for ecosystem functioning, even if exotic invasive species can be more efficient in some ecological processes. No general pattern can be drawn for functional consequences of native dominant species replacement by exotic invasive ones.
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https://tel.archives-ouvertes.fr/tel-00743158
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Submitted on : Thursday, October 18, 2012 - 11:51:26 AM
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  • HAL Id : tel-00743158, version 1

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Marion Bottollier-Curtet. Conséquences des invasions végétales sur le fonctionnement des écosystèmes riverains fluviaux. Biodiversité et Ecologie. Université Paul Sabatier - Toulouse III, 2010. Français. ⟨tel-00743158⟩

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