Pyrosequencing Reveals Changes in Soil Bacterial Communities after Conversion of Yungas Forests to Agriculture

摘要: The Southern Andean Yungas in Northwest Argentina constitute one of the main biodiversity hotspots world. Considerable changes land use have taken place this ecoregion, predominantly related to forest conversion croplands, inducing losses above-ground and with potential impact on soil microbial communities. In study, we used high-throughput pyrosequencing 16S ribosomal RNA gene assess whether land-use change time under agriculture affect composition diversity bacterial We selected two areas dedicated sugarcane soybean production, comprising both short- long-term agricultural sites, adjacent native soils as a reference. Land-use altered communities, differences between productive despite similarities forests. At phylum level, only Verrucomicrobia Firmicutes changed abundance after deforestation for cropping, respectively. cultivated soils, decreased sharply (~80%), while were more abundant. Despite fact that local was increased systems not by phylogenetic beta declined along chronosequences, evidencing homogenization communities over time. spite detected alteration diversity, found core microbiome resistant disturbances caused forests lands few or none exclusive OTUs each type. overall relative copiotrophic oligotrophic taxa may an ecosystem functionality. However, many common also share functional attributes, allowing maintain at least some services croplands.