Biogeographical patterns of soil molecular microbial biomass

Affiche - résumé. Session GC: Microbes in the Changing Environmenl: Global Climate Change and Soif under Human Impact; International audience; The spatial organization of soil microbial communities over large areas and the identification of environmental factors structuring their distribution have been liUle investigated. The overall objective of this study was to determine the spatial paUerning of microbial biomass in soils on wide extent and to rank the environmental fiUers most influencing this distribution, by using the French Soil Quality Monitoring Network. This network covers ail the French terrilory and soils were sampled at2,150 sites along a systematic grid sampling. The soil DNA …

Spatial processes driving soil microbial community assembly on a wide scale

International audience; Soil houses a huge biodiversity involved in ecological services through microbial community assembly. However, processes driving soil microbial community assembly are still scarcely understood, particularly the relative importance of environmental heterogeneity regarding to dispersal limitations. This can be achieved through studying the determinism of taxa-area relationship (TAR, how community composition change with geographic distance), a fundamental relationship in ecology. Here, a biogeographical approach was applied on a wide scale to evaluate TAR for soil bacterial and fungal communities and to partition their spatial variations into environmental heterogeneit…

Impact d'une coupe rase sur les teneurs en carbone organique et leur dynamique dans les sols des Landes de Gascogne

National audience

Microbiogéographie à l'échelle du territoire national

Microbial-biogeography at the scale of France by the use of molecular tools applied to the French soil quality monitoring network (RMQS)

International audience

Biogéographie Microbienne: mythe ou réalité ?

National audience; Bien que les microorganismes soient les organismes les plus diversifiés et les plus abondants de notre planète, le déterminisme de leur diversification et de leur distribution spatiale à petite, comme à grande échelle, est très peu documenté. Ce manque d’intégration de l’échelle spatiale en écologie microbienne limite l’application des concepts développés en biogéographie pour les macro-organismes tels que la bêta-diversité (comment la composition des communautés change à l’échelle du paysage), qui est centrale pour la compréhension de la régulation et de l’évolution de la biodiversité en fonction des paramètres du milieu. Par conséquent, il est impossible à ce jour de dé…

Soil fungal communities ecology: a biogeographical approach

Affiche, résumé; International audience

Patterns biogéographiques de la diversité bactérienne des sols à l'échelle du territoire national

aeres : C-COM; National audience; no abstract