INIBIOMA   20415
INSTITUTO DE INVESTIGACIONES EN BIODIVERSIDAD Y MEDIOAMBIENTE
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Bacteria communities and connectivity in proglacial aquatic environments from Mount Tronador system (Patagonia; Argentina)
Autor/es:
MODENUTTI, B.; SEBASTIÁN MARQUEZ; MARCELA BASTIDAS NAVARRO; ESTEBAN BALSEIRO; NICOLÁS MARTYNIUK
Lugar:
Valparaiso
Reunión:
Congreso; 1st ISME-Latin America Congress; 2019
Institución organizadora:
Universidad Técnica Federico Santa María,
Resumen:
Bacteria communities and connectivity in proglacial aquatic environments from Mount Tronador system (Patagonia; Argentina)Beatriz Modenutti, Marcela Bastidas Navarro, Nicolás Martyniuk, Sebastián Marquez and Esteban BalseiroAquatic ecosystems in the North Patagonia are facing changes as a result of glacial recession due to global warming. Here, we studied different bacterial communities and connectivity in different aquatic environments of the Tronador Mountain system corresponding to both, Atlantic and Pacific watersheds. We sampled streams, a newly formed lake and two proglacial lakes (upper and lower strata) that receives the input of glacial clays. In addition, we studied two lakes in the area that, at the present, are not connected with glaciers. We determined nutrient concentrations, bacteria abundances, and bacteria community composition using next-generation sequencing of the 16S rRNA gene. Results showed that each environment had distinctive microbial assemblages and only 171 phylotypes were shared by the different studied environment. The highest species richness and the highest number of exclusive phylotypes, were observed in the newly formed lake Ventisquero Negro. However, several taxa (314) present in this proglacial lake, still in contact with the glacier, remain in downstream communities of the deep Lake Mascardi. The obtained results imply that the rapid changes that occur in proglacial lakes associated with climate warming will affect downstream microbial community structure throughout all spatially connected habitats.