Seasonal dynamics alter taxonomical and functional microbial profiles in Pampa biome soils under natural grasslands

Author(s)

Muller Barboza, Anthony Diego ^[1] ; Pylro, Victor Satler ^[2] ; Seminot Jacques, Rodrigo Josemar ^[3] ; Gubiani, Paulo Ivonir ^[3] ; Ferreira de Quadros, Fernando Luiz ^[4] ; da Trindade, Julio Kuhn ^[5] ; Triplett, Eric W. ^[6] ; Roesch, Luiz ^[1]

Affiliation

^[1] Univ Fed Pampa, Ctr Interdisciplinar Pesquisas Biotecnol CIP Biot, Sao Gabriel - Brazil

^[2] Univ Sao Paulo ESALQ USP, Luiz de Queiroz Coll Agr, Dept Soil Sci, Piracicaba - Brazil

^[3] Univ Fed Santa Maria, Programa Posgrad Ciencia Solo, Dept Solos, Santa Maria, RS - Brazil

^[4] Univ Fed Santa Maria, Dept Anim Sci, Santa Maria, RS - Brazil

^[5] Secretaria Estadual Agr Pecuaria & Irrigacao, Dept Diagnost & Pesquisa Agr, Sao Gabriel - Brazil

^[6] Univ Florida, Dept Microbiol & Cell Sci, Gainesville, FL 32611 - USA

• Document type: Journal article
• Source: PeerJ; v. 6, JUN 13 2018.
• Web of Science Citations: 3

Abstract

Soil microbial communities' assembly is strongly tied to changes in temperature and moisture. Although microbial functional redundancy seems to overcome taxonomical composition changes, the sensitivity and resilience of soil microbial communities from subtropical regions in response to seasonal variations are still poorly understood. Thus, the development of new strategies for biodiversity conservation and sustainable management require a complete understanding of the soil abiotic process involved in the selection of microbial taxa and functions. In this work, we used state of the art molecular methodologies (Next Generation Sequencing) to compare the taxonomic (metataxonomics) and functional (metatranscriptomics) profiles among soil samples from two subtropical natural grasslands located in the Pampa biome, Brazil, in response to short-term seasonal variations. Our data suggest that grasslands maintained a stable microbial community membership along the year with oscillation in abundance. Apparently soil microbial taxa are more susceptible to natural climatic disturbances while functions are more stable and change with less intensity along the year. Finally, our data allow us to conclude that the most abundant microbial groups and functions were shared between seasons and locations reflecting the existence of a stable taxonomical and functional core microbiota. (AU)

• FAPESP's process: 16/02219-8 - A meta-omics approach to examine disturbances in soils of the Brazilian Amazonia
• Grantee: Victor Satler Pylro
• Support Opportunities: Scholarships in Brazil - Post-Doctoral