Pyrosequencing reveals changes in soil bacterial communities after conversion of Yungas forests to agriculture

PloS One
Marcela S MontecchiaOlga S Correa

Abstract

The Southern Andean Yungas in Northwest Argentina constitute one of the main biodiversity hotspots in the world. Considerable changes in land use have taken place in this ecoregion, predominantly related to forest conversion to croplands, inducing losses in above-ground biodiversity and with potential impact on soil microbial communities. In this study, we used high-throughput pyrosequencing of the 16S ribosomal RNA gene to assess whether land-use change and time under agriculture affect the composition and diversity of soil bacterial communities. We selected two areas dedicated to sugarcane and soybean production, comprising both short- and long-term agricultural sites, and used the adjacent native forest soils as a reference. Land-use change altered the composition of bacterial communities, with differences between productive areas despite the similarities between both forests. At the phylum level, only Verrucomicrobia and Firmicutes changed in abundance after deforestation for sugarcane and soybean cropping, respectively. In cultivated soils, Verrucomicrobia decreased sharply (~80%), while Firmicutes were more abundant. Despite the fact that local diversity was increased in sugarcane systems and was not altered by soybean cr...Continue Reading

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Datasets Mentioned

BETA
PRJNA260275

Methods Mentioned

BETA
electrophoresis
PCR

Software Mentioned

CAP
MASS package of
UniFrac
R package labdsv
PyroNoise
R Core
IndVal
mothur
Jujuy
AMOVA

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