Seasonal dynamics of extremely halophilic microbial communities in three Argentinian salterns

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Título: Seasonal dynamics of extremely halophilic microbial communities in three Argentinian salterns
Autor/es: Di Meglio, Leonardo | Santos Sánchez, Fernando | Gomariz, María | Almansa Carrascosa, María Cristina | López, Cristina | Anton, Josefa | Nercessian, Débora
Grupo/s de investigación o GITE: Ecología Microbiana Molecular
Centro, Departamento o Servicio: Universidad de Alicante. Departamento de Fisiología, Genética y Microbiología | Universidad de Alicante. Servicios Técnicos de Investigación
Palabras clave: Halophilic microorganisms | Haloviruses | Microbial dynamics | Prokaryotic diversity | Hypersaline environments | Environmental parameters
Área/s de conocimiento: Microbiología | Biología Celular
Fecha de publicación: dic-2016
Editor: Oxford University Press
Cita bibliográfica: FEMS Microbiology Ecology. 2016, 92(12): fiw184. doi:10.1093/femsec/fiw184
Resumen: Seasonal sampling was carried out at three Argentinian salterns, Salitral Negro (SN), Colorada Grande (CG) and Guatraché (G), to analyze abiotic parameters and microbial diversity and dynamics. Microbial assemblages were correlated to environmental factors by statistical analyses. Principal component analysis of the environmental data grouped SN and CG samples separately from G samples owing to G's higher pH values and sulfate concentration. Differences in microbial assemblages were also found. Many archaeal sequences belonged to uncultured members of Haloquadratum and Haloquadratum-related genera, with different environmental optima. Notably, nearly half of the archaeal sequences were affiliated to the recently described ‘Candidatus Haloredividus’ (phylum Nanohaloarchaeota), not previously detected in salt-saturated environments. Most bacterial sequences belonged to Salinibacter representatives, while sequences affiliated to the recently described genus Spiribacter were also found. Seasonal analysis showed at least 40% of the microbiota from the three salterns was prevalent through the year, indicating they are well adapted to environmental fluctuations. On the other hand, a minority of archaeal and bacterial sequences were found to be seasonally distributed. Five viral morphotypes and also eukaryal predators were detected, suggesting different mechanisms for controlling prokaryotic numbers. Notably, Guatraché was the saltern that harbored the highest virus-to-cell ratios reported to date for hypersaline environments.
Patrocinador/es: This work was supported by Agencia Española de Cooperación Internacional (AECI) [Grant number AECIA/023820/09], the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Mar del Plata (UNMdP), Argentina and by the Ministerio Español de Economía y Competitividad (MINECO) [Grant number CGL2015-66686-C3-3-P].
URI: http://hdl.handle.net/10045/64693
ISSN: 0168-6496 (Print) | 1574-6941 (Online)
DOI: 10.1093/femsec/fiw184
Idioma: eng
Tipo: info:eu-repo/semantics/article
Derechos: © FEMS 2016
Revisión científica: si
Versión del editor: http://dx.doi.org/10.1093/femsec/fiw184
Aparece en las colecciones:INV - EMM - Artículos de Revistas

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