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Changes in the bacterioplankton community structure from southern Gulf of Mexico during a simulated crude oil spill at mesocosm ccale

Valencia Agami, Sonia S [autor] | Cerqueda García, Daniel [autor] | Putzeys, Sébastien [autor] | Uribe Flores, María Magdalena [autor] | García Cruz, Norberto Ulises [autor] | Pech Pool, Daniel Guadalupe [autor] | Herrera Silveira, Jorge Alfredo [autor] | Aguirre Macedo, M. Leopoldina [autor] | García Maldonado, José Q [autor].
Tipo de material: Artículo en línea Artículo en línea Tema(s): Bacterioplancton | Composición de la población | Derrame de petróleo | Hidrocarburos | Degradación ambiental | BiorremediaciónTema(s) en inglés: Bacterioplankton | Population composition | Oil spills | Hydrocarbons | Environmental degradation | Bioremediation | Yucatan Peninsula (Mexico)Descriptor(es) geográficos: Yucatán (Península) (México) Nota de acceso: Acceso en línea sin restricciones En: Microorganisms. volumen 7, número 10, 441 (11 Oct 2019), páginas 1-14. --ISSN: 2076-260Número de sistema: 59642Resumen:
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The southern Gulf of Mexico (sGoM) is highly susceptible to receiving environmental impacts due to the recent increase in oil-related activities. In this study, we assessed the changes in the bacterioplankton community structure caused by a simulated oil spill at mesocosms scale. The 16S rRNA gene sequencing analysis indicated that the initial bacterial community was mainly represented by Gamma-proteobacteria, Alpha-proteobacteria, Flavobacteriia, and Cyanobacteria. The hydrocarbon degradation activity, measured as the number of culturable hydrocarbonoclastic bacteria (CHB) and by the copy number of the alkB gene, was relatively low at the beginning of the experiment. However, after four days, the hydrocarbonoclastic activity reached its maximum values and was accompanied by increases in the relative abundance of the well-known hydrocarbonoclastic Alteromonas. At the end of the experiment, the diversity was restored to similar values as those observed in the initial time, although the community structure and composition were clearly di erent, where Marivita, Pseudohongiella, and Oleibacter were detected to have di erential abundances on days eight-14. These changes were related with total nitrogen (p value = 0.030 and r² = 0.22) and polycyclic aromatic hydrocarbons (p value = 0.048 and r² = 0.25), according to PERMANOVA. The results of this study contribute to the understanding of the potential response of the bacterioplankton from sGoM to crude oil spills.

Recurso en línea: https://www.mdpi.com/2076-2607/7/10/441
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Acceso en línea sin restricciones

The southern Gulf of Mexico (sGoM) is highly susceptible to receiving environmental impacts due to the recent increase in oil-related activities. In this study, we assessed the changes in the bacterioplankton community structure caused by a simulated oil spill at mesocosms scale. The 16S rRNA gene sequencing analysis indicated that the initial bacterial community was mainly represented by Gamma-proteobacteria, Alpha-proteobacteria, Flavobacteriia, and Cyanobacteria. The hydrocarbon degradation activity, measured as the number of culturable hydrocarbonoclastic bacteria (CHB) and by the copy number of the alkB gene, was relatively low at the beginning of the experiment. However, after four days, the hydrocarbonoclastic activity reached its maximum values and was accompanied by increases in the relative abundance of the well-known hydrocarbonoclastic Alteromonas. At the end of the experiment, the diversity was restored to similar values as those observed in the initial time, although the community structure and composition were clearly di erent, where Marivita, Pseudohongiella, and Oleibacter were detected to have di erential abundances on days eight-14. These changes were related with total nitrogen (p value = 0.030 and r² = 0.22) and polycyclic aromatic hydrocarbons (p value = 0.048 and r² = 0.25), according to PERMANOVA. The results of this study contribute to the understanding of the potential response of the bacterioplankton from sGoM to crude oil spills. eng

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