Uncovering Hidden Microbial Diversity in Nitrate/Iodide Deposits (NIDs) in the Domeyko District, Atacama Desert, Chile

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dc.contributor.authorMayra Cortés
dc.contributor.authorPriscilla Avendaño
dc.contributor.authorOlga Encalada
dc.contributor.authorCamila Salazar Ardiles
dc.contributor.authorDavid C. Andrade
dc.contributor.authorBenito Gómez Silva
dc.contributor.authorDaniel Contreras
dc.contributor.authorNorman Toro
dc.contributor.authorDayana Arias
dc.contributor.authorLorena V. Escudero
dc.date.accessioned2026-01-21T15:22:30Z
dc.date.available2026-01-21T15:22:30Z
dc.date.issued2024
dc.description.abstractUnique worldwide, nitrate/iodine deposits (NIDs) are located along a 700 km geological belt in the Atacama Desert, Chile. They serve as the primary source of mineral ores for the extraction of iodine, sodium, and potassium nitrates. NIDs have been relatively underexplored from a biological perspective. To address this, we collected sixteen soil samples from abandoned mines in Oficinas Pissis and Savona for chemical, mineralogical, and metagenomic analyses. The soils primarily consisted of halite and darapskite, with only one sample being predominantly composed of thenardite. Deliquescence and water activity measurements yielded values ranging from 0.02% to 0.40% and 0.47 to 0.62, respectively. To investigate the presence, identification, relative abundance, and diversity of microbial life in NID soils, we employed MiSeq high-throughput sequencing and bioinformatic tools. The dominant phyla observed were Firmicutes and Proteobacteria, with Actinobacteria and Cyanobacteria being predominant in two soil samples. Furthermore, we detected nitrate/perchloratereducing bacterial activity in enriched cultures from the soil samples. This study sheds light on the resilience of microbial life in the Atacama Desert NIDs, providing compelling evidence for its existence and offering insight into factors that could facilitate it within this unique environment.
dc.identifier.doi10.3390/soilsystems8020046
dc.identifier.issn25718789
dc.identifier.urihttps://repositorioabierto.uantof.cl/handle/uantof/623
dc.language.isoen
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceSoil Systems
dc.titleUncovering Hidden Microbial Diversity in Nitrate/Iodide Deposits (NIDs) in the Domeyko District, Atacama Desert, Chile
dc.typeArticle
oaire.citation.volume8
organization.identifier.rorUniversidad de Antofagasta
uantof.identificator.centerCentro de Investigación en Fisiología y Medicina de Altura
uantof.identificator.departmentDepartamento Biomédico
uantof.identificator.facultyFacultad de Ciencias de la Salud
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