Taxonomic and functional biogeographies of soil bacterial communities across the Tibet plateau are better explained by abiotic conditions than distance and plant community composition

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dc.contributor.affiliationUniversity of Lyon System-Le Roux, Xavier
dc.contributor.authorLe Roux, Xavier
dc.date.accessioned2025-04-29T14:03:00Z
dc.date.issued2023-08-17
dc.date.issued2023-08-17
dc.descriptionThe processes governing soil bacteria biogeography are still not fully understood. It remains unknown how the importance of environmental filtering and dispersal differs between bacterial taxonomic and functional biogeography, and whether their importance is scale-dependent. We sampled soils across the Tibet plateau, with distances among plots ranging from 20 m to 1,550 km. Taxonomic composition of bacterial community was characterized by 16S amplicon sequencing and functional community composition by qPCR targeting 9 functional groups involved in N dynamics. Factors representing climate, soil, and plant community were measured to assess different facets of environmental dissimilarity. Both bacterial taxonomic and functional dissimilarities were more related to abiotic dissimilarity than biotic (vegetation) dissimilarity or distance. Taxonomic dissimilarity was mostly explained by differences in soil pH and mean annual temperature (MAT), while functional dissimilarity was linked to differences in soil N and P availabilities and N:P ratio. Soil pH and MAT remained the main determinants of taxonomic dissimilarity across spatial scales. In contrast, the explanatory variables of N-related functional dissimilarity varied across the scales, with soil moisture and organic matter having the highest role across short distances (<~330 km), and available P, N:P ratio and distance being important over long distances (>~660 km). Our results demonstrate how biodiversity dimension (taxonomic versus functional aspects) and spatial scale influence the factors driving soil bacterial biogeography.
dc.identifierhttps://doi.org/10.5061/dryad.pc866t1tf
dc.identifier.urihttps://datakatalogi.helsinki.fi/handle/123456789/5486
dc.rights.licensecc-zero
dc.subjectBacteria
dc.subjectsoil
dc.subjectClimate record
dc.subjectGenetics
dc.subjectEcology
dc.subjectEvolution
dc.subjectBehavior and Systematics
dc.titleTaxonomic and functional biogeographies of soil bacterial communities across the Tibet plateau are better explained by abiotic conditions than distance and plant community composition
dc.typedataset

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