Differential Response of Acidobacteria Subgroups to Forest-to-Pasture Conversion and Their Biogeographic Patterns in the Western Brazilian Amazon

Autor(es)

Navarrete, Acacio A. ^[1] ; Venturini, Andressa M. ^[1] ; Meyer, Kyle M. ^[2] ; Klein, Ann M. ^[2] ; Tiedje, James M. ^[3] ; Bohannan, Brendan J. M. ^[2] ; Nuesslein, Klaus ^[4] ; Tsai, Siu M. ^[1] ; Rodrigues, Jorge L. M. ^[5]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Ctr Nucl Energy Agr, Cell & Mol Biol Lab, Piracicaba - Brazil

^[2] Univ Oregon, Dept Biol, Inst Ecol & Evolut, Eugene, OR 97403 - USA

^[3] Michigan State Univ, Ctr Microbial Ecol, Dept Plant Soil & Microbial Sci, E Lansing, MI 48824 - USA

^[4] Univ Massachusetts, Dept Microbiol, Amherst, MA 01003 - USA

^[5] Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 - USA

• Tipo de documento: Artigo Científico
• Fonte: FRONTIERS IN MICROBIOLOGY; v. 6, DEC 22 2015.
• Citações Web of Science: 16

Resumo

Members of the phylum Acidobacteria are among the most abundant soil bacteria on Earth, but little is known about their response to environmental changes. We asked how the relative abundance and biogeographic patterning of this phylum and its subgroups responded to forest-to-pasture conversion in soils of the western Brazilian Amazon. Pyrosequencing of 16S rRNA genes was employed to assess the abundance and composition of the Acidobacteria community across 54 soil samples taken using a spatially nested sampling scheme at the landscape level. Numerically, Acidobacteria represented 20% of the total bacterial community in forest soils and 11% in pasture soils. Overall, 15 different Acidobacteria subgroups of the current 26 subgroups were detected, with Acidobacteria subgroups 1, 3, 5, and 6 accounting together for 87% of the total Acidobacteria community in forest soils and 75% in pasture soils. Concomitant with changes in soil chemistry after forest-to-pasture conversion particularly an increase in properties linked to soil acidity and nutrient availability we observed an increase in the relative abundances of Acidobacteria subgroups 4, 10, 17, and 18, and a decrease in the relative abundances of other Acidobacteria subgroups in pasture relative to forest soils. The composition of the total Acidobacteria community as well as the most abundant Acidobacteria subgroups (1, 3, 5, and 6) was significantly more similar in composition across space in pasture soils than in forest soils. These results suggest that preponderant responses of Acidobacteria subgroups, especially subgroups 1, 3, 4, 5, and 6, to forest-to-pasture conversion effects in soils could be used to define management-indicators of agricultural practices in the Amazon Basin. These acidobacterial responses are at least in part through alterations on acidity- and nutrient-related properties of the Amazon soils. (AU)

• Processo FAPESP: 14/50320-4 - Dimensões US-BIOTA - São Paulo: pesquisa colaborativa: integrando as dimensões da biodiversidade microbiana ao longo de áreas de alteração do uso da terra em florestas tropicais
• Beneficiário: Tsai Siu Mui
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Temático
• Processo FAPESP: 12/13321-7 - Bio-indicadores microbianos taxonômicos e funcionais em solos sob sistemas de produção de cana-de-açúcar
• Beneficiário: Acacio Aparecido Navarrete
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 08/58114-3 - Monitoring the microbial diversity and functional activities in response to land-use changes and deforestation under soybean and sugarcane cultivations
• Beneficiário: Tsai Siu Mui
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático