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Microbial and Geochemical Diversity of Laguna Timone, an Extreme Hypersaline Crater Lake in Patagonia (52° S)

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dc.contributor.authorHenríquez, Carolina
dc.contributor.authorPérez-Donoso, José M.
dc.contributor.authorBruna, Nicolás
dc.contributor.authorCalderón, Mauricio
dc.contributor.authorFadel Cury, Leonardo
dc.contributor.authorQuezada, Paulo
dc.contributor.authorAthayde, Gustavo
dc.contributor.authorOyarzún, Poldie
dc.contributor.authorBahniuk, Anelize
dc.date.accessioned2026-10-06T16:37:33Z
dc.date.available2026-10-06T16:37:33Z
dc.date.issued2025
dc.description.abstractExtreme environments, such as hypersaline habitats, hot springs, deep-sea hydrothermal vents, glaciers, and permafrost, provide diverse ecological niches for studying microbial evolution. However, knowledge of microbial communities in extreme environments at high southern latitudes remains limited, aside from Antarctica. Laguna Timone is a hypersaline crater lake located in a Pleistocene maar of the Pali Aike Volcanic Field, southern Patagonia; the lake was formed during basaltic eruptions in a periglacial setting. Here, we report the first integrative characterization of microbial communities from biofilms and microbial mats in this lake using high-throughput 16S rRNA and ITS gene sequencing, along with mineralogical and hydrochemical analyses of water, sediments, and carbonates. Bacterial communities were dominated by the genera Enterobacterales ASV1, Pseudomonas, Oscillatoria, Nodularia, and Belliella, with site-specific assemblages. Fungal communities included Laetinaevia, Ilyonectria, Thelebolus, Plectosphaerella, and Acrostalagmus, each showing distinct distribution patterns. These baseline data contribute to understanding microbial dynamics in hypersaline maar environments and support future investigations. This integrative approach highlights key microbe–mineral relationships and underscores the potential of Laguna Timone as a natural laboratory for exploring biosignature formation and microbial adaptation in chemically extreme environments, both on early Earth and potentially beyond.
dc.description.versionVersión publicada
dc.format.extent21 p.
dc.identifier.citationHenríquez, C., Pérez-Donoso, J. M., Bruna, N., Calderón, M., Cury, L. F., Quezada, P., Athayde, G., Oyarzún, P., & Bahniuk, A. (2025). Microbial and Geochemical Diversity of Laguna Timone, an Extreme Hypersaline Crater Lake in Patagonia (52° S). Microorganisms, 13(8), 1957. https://doi.org/10.3390/microorganisms13081957
dc.identifier.doihttps://doi.org/10.3390/microorganisms13081957
dc.identifier.urihttps://hdl.handle.net/11447/11234
dc.language.isoen
dc.subjectMicrobial communities
dc.subjectMicrobial mats
dc.subjectHypersaline lake
dc.subjectGeochemistry
dc.subjectSouthern Patagonia
dc.titleMicrobial and Geochemical Diversity of Laguna Timone, an Extreme Hypersaline Crater Lake in Patagonia (52° S)
dc.typeArticle
dcterms.accessRightsAcceso abierto
dcterms.sourceMicroorganisms
dspace.entity.typePublication

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