Les co-occurrence au sein des communautés de diatomées révèlent moins de ségrégation que prédit par un modèle de niche
Langue
en
Article de revue
Ce document a été publié dans
PLoS ONE. 2016, vol. 11, n° 4, p. 18 p.
Public Library of Science
Résumé en anglais
Species co-occurrence patterns give significant insights into the processes shaping communities. While biotic interactions have been widely studied using co-occurrence analyses in animals and larger plants, studies about ...Lire la suite >
Species co-occurrence patterns give significant insights into the processes shaping communities. While biotic interactions have been widely studied using co-occurrence analyses in animals and larger plants, studies about co-occurrences among micro-organisms are quite rare. We examined stream diatom co-occurrences and nestedness in France, and tested the significance of the patterns with a set of random and environmentally constrained null models. Real communities showed a higher segregation than the most conservative random null models, but a general aggregation of co-occurrences when compared to environmentally constrained null models. We did not find any evidence of limiting similarity between co-occurring species. Aggregations of species co-occurrences were associated with the high levels of nestedness. Altogether, these results suggested that biotic interactions were not structuring co-occurrences of diatom species at our study scale. Instead, the patterns were more likely to be related with colonization patterns, mass-effect, and local dynamics of diatom biofilms. We further highlight that the association of random and environmentally constrained null models may give realistic insights into the co-occurrence patterns of microbial communities data.< Réduire
Mots clés
DIATOMEE
MODELISATION
Mots clés en anglais
DIATOM
MODELLING
Origine
Importé de halUnités de recherche