INVESTIGADORES
MARTYNIUK nicolas Alejandro
artículos
Título:
Glacial Infuence Afects Modularity in Bacterial Community Structure in Three Deep Andean North‑Patagonian Lakes
Autor/es:
MODENUTTI, B.; MARTYNIUK, N.; BASTIDAS NAVARRO, M.; BALSEIRO, E.
Revista:
MICROBIAL ECOLOGY
Editorial:
SPRINGER
Referencias:
Lugar: Berlin; Año: 2023
ISSN:
0095-3628
Resumen:
We analyze the bacteria community composition and the ecological processes structuring these communities in three deeplakes that receive meltwater from the glaciers of Mount Tronador (North-Patagonia, Argentina). Lakes difer in their glacialconnectivity and in their turbidity due to glacial particles. Lake Ventisquero Negro is a recently formed proglacial lake andit is still in contact with the glacier. Lakes Mascardi and Frías lost their glacial connectivity during the Pleistocene-Holocenetransition. Total dissolved solid concentration has a signifcant contribution to the environmental gradient determining thesegregation of the three lakes. The newly formed lake Ventisquero Negro conformed a particular bacterial community thatseemed to be more related to the microorganisms coming from glacier melting than to the other lakes of the basin. The netrelatedness index (NRI) showed that the bacterial community of lake Ventisquero Negro is determined by environmentalfltering, while in the other lakes, species interaction would be a more important driver. The co-occurrence network analysisshowed an increase in modularity and in the number of modules when comparing Lake Ventisquero Negro with the twolarge glacier-fed lakes suggesting an increase in heterogeneity. At the same time, the presence of modules with phototrophicbacteria (Cyanobium strains) in lakes Frías and Mascardi would refect the increase of this functional photosynthetic association. Overall, our results showed that the reduction in ice masses in Patagonia will afect downstream large deep Piedmontlakes losing the glacial infuence in their bacterial communities