Les co-occurrence au sein des communautés de diatomées révèlent moins de ségrégation que prédit par un modèle de niche
Idioma
en
Article de revue
Este ítem está publicado en
PLoS ONE. 2016, vol. 11, n° 4, p. 18 p.
Public Library of Science
Resumen en inglés
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 ...Leer más >
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.< Leer menos
Palabras clave
DIATOMEE
MODELISATION
Palabras clave en inglés
DIATOM
MODELLING
Orígen
Importado de HalCentros de investigación