Search results for "Assemblage des communautés"
showing 3 items of 3 documents
Deciphering Biotic Interactions and Their Role in Soil Microbial Community Assembly and Functions
2022
Microbial communities play a key role in ecosystem functioning as well as in plant, animal, and human welfare. Their assembly relies on different processes commonly referred to as abiotic and biotic filters. Despite the widespread emphasis on abiotic filters in terrestrial ecosystems, a growing body of evidence suggests that interactions between microorganisms play a critical role in community assembly. However, the contribution of these interactions to microbial community assembly and the factors influencing them have not been clearly established. In most cases, biotic interactions between microorganisms have been investigated based on cocultures of a handful of strains, completely overloo…
Dynamique et assemblage des communautés adventices : Approche par modélisation statistique
2011
To develop solutions for a productive and sustainable agriculture, principles, theories, andmethods of ecology may contribute to understand the biological processes governing the agroecosystem.The present case study was based on data collected by a network of observatories of weeds covering the whole of France (‘Biovigilance Flore’) and aimed at establishing forrules governing the assemblage and dynamics of weed communities in fields grown with annual crops. We particularly studied the possible relationships between species within acommunity, as well as the relationships between communities and their environment. Analyses were based on species abundances to take account of their effect on c…
Colonisation des paysages agricoles par les espèces des bordures adjacentes : apports de l’approche fonctionnelle
2014
National audience; Une crainte avancée par les agriculteurs repose sur l’hypothèse qu’une gestion plus raisonnée des bordures adjacentes aux champs cultivés pourrait, par relâchement de la pression de fauche, favoriser l’entrée de nouvelles espèces, bisannuelles ou pérennes, dans les parcelles agricoles. Afin de répondre à cette interrogation, notre objectif a été de proposer un cadre conceptuel théorique associant plusieurs champs disciplinaires de l’écologie. En comparaison des études précédemment réalisées, notre apport réside en la prise en compte des traits fonctionnels favorisant la dispersion à courte et longue distance, ainsi que des traits expliquant le maintien de populations viab…