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Type: Congresso
Title: Microbial Diversity In Degraded And Non-degraded Petroleum Samples And Comparison Across Oil Reservoirs At Local And Global Scales
Author: Sierra-Garcia
Isabel Natalia; Dellagnezze
Bruna M.; Santos
Viviane P.; Chaves B
Michel R.; Capilla
Ramses; Santos Neto
Eugenio V.; Gray
Neil; Oliveira
Valeria M.
Abstract: Microorganisms have shown their ability to colonize extreme environments including deep subsurface petroleum reservoirs. Physicochemical parameters may vary greatly among petroleum reservoirs worldwide and so do the microbial communities inhabiting these different environments. The present work aimed at the characterization of the microbiota in biodegraded and non-degraded petroleum samples from three Brazilian reservoirs and the comparison of microbial community diversity across oil reservoirs at local and global scales using 16S rRNA clone libraries. The analysis of 620 16S rRNA bacterial and archaeal sequences obtained from Brazilian oil samples revealed 42 bacterial OTUs and 21 archaeal OTUs. The bacterial community from the degraded oil was more diverse than the non-degraded samples. Non-degraded oil samples were overwhelmingly dominated by gammaproteobacterial sequences with a predominance of the genera Marinobacter and Marinobacterium. Comparisons of microbial diversity among oil reservoirs worldwide suggested an apparent correlation of prokaryotic communities with reservoir temperature and depth and no influence of geographic distance among reservoirs. The detailed analysis of the phylogenetic diversity across reservoirs allowed us to define a core microbiome encompassing three bacterial classes (Gammaproteobacteria, Clostridia, and Bacteroidia) and one archaeal class (Methanomicrobia) ubiquitous in petroleum reservoirs and presumably owning the abilities to sustain life in these environments.
Subject: Microbial Diversity
Petroleum Reservoirs
Editor: Springer Japan KK
Citation: Extremophiles. Springer Japan Kk, v. 21, p. 211 - 229, 2017.
Rights: fechado
Identifier DOI: 10.1007/s00792-016-0897-8
Date Issue: 2017
Appears in Collections:Unicamp - Artigos e Outros Documentos

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