Please use this identifier to cite or link to this item:
metadata.artigo.dc.title: Land use intensification in the humid tropics increased both alpha and beta diversity of soil bacteria
metadata.artigo.dc.creator: Carvalho, Teotonio Soares de
Jesus, Ederson da Conceição
Barlow, Jos
Gardner, Toby A.
Soares, Isaac Carvalho
Tiedje, James M.
Moreira, Fatima Maria de Souza
metadata.artigo.dc.subject: Below‐ground biodiversity
High‐throughput sequencing
Rivers of bacterial community composition
Biodiversidade abaixo do solo
Sequenciamento de alto rendimento
Rios de composição de comunidade bacteriana
metadata.artigo.dc.publisher: Ecological Society of America Oct-2016
metadata.artigo.dc.identifier.citation: CARVALHO, T. S. de et al. Land use intensification in the humid tropics increased both alpha and beta diversity of soil bacteria. Ecology, New York, v. 97, n. 10, p. 2760-2771, Oct. 2016.
metadata.artigo.dc.description.abstract: Anthropogenic pressures on tropical forests are rapidly intensifying, but our understanding of their implications for biological diversity is still very limited, especially with regard to soil biota, and in particular soil bacterial communities. Here we evaluated bacterial community composition and diversity across a gradient of land use intensity in the eastern Amazon from undisturbed primary forest, through primary forests varyingly disturbed by fire, regenerating secondary forest, pasture, and mechanized agriculture. Soil bacteria were assessed by paired‐end Illumina sequencing of 16S rRNA gene fragments (V4 region). The resulting sequences were clustered into operational taxonomic units (OTU) at a 97% similarity threshold. Land use intensification increased the observed bacterial diversity (both OTU richness and community heterogeneity across space) and this effect was strongly associated with changes in soil pH. Moreover, land use intensification and subsequent changes in soil fertility, especially pH, altered the bacterial community composition, with pastures and areas of mechanized agriculture displaying the most contrasting communities in relation to undisturbed primary forest. Together, these results indicate that tropical forest conversion impacts soil bacteria not through loss of diversity, as previously thought, but mainly by imposing marked shifts on bacterial community composition, with unknown yet potentially important implications for ecological functions and services performed by these communities.
metadata.artigo.dc.language: en_US
Appears in Collections:DCS - Artigos publicados em periódicos

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.