Protist communities of microbial mats from the extreme environments of five saline Andean lagoons at high altitudes in the Atacama Desert

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dc.contributor.authorEduardo Acosta
dc.contributor.authorFrank Nitsche
dc.contributor.authorCristina Dorador
dc.contributor.authorHartmut Arndt
dc.date.accessioned2026-04-20T19:19:50Z
dc.date.available2026-04-20T19:19:50Z
dc.date.issued2024
dc.description.abstractIntroduction:Heterotrophic protists colonizing microbial mats have received little attention over the last few years, despite their importance in microbial food webs. A significant challenge originates from the fact that many protists remain uncultivable and their functions remain poorly understood.Methods:Metabarcoding studies of protists in microbial mats across high-altitude lagoons of different salinities (4.3–34 practical salinity units) were carried out to provide insights into their vertical stratification at the millimeter scale. DNA and cDNA were analyzed for selected stations.Results:Sequence variants classified as the amoeboid rhizarian Rhogostoma and the ciliate Euplotes were found to be common members of the heterotrophic protist communities. They were accompanied by diatoms and kinetoplastids.Correlation analyses point to the salinity of the water columnas a main driver influencing the structure of the protist communities at the five studied microbial mats. The active part of the protist communities was detected to be higher at lower salinities (<20 practical salinity units).Discussion:We found a restricted overlap of the protist community between the different microbial mats indicating the uniqueness of these different aquatic habitats. On the other hand, the dominating genotypes present in metabarcoding were similar and could be isolated and sequenced in comparative studies(Rhogostoma, Euplotes,Neobodo). Our results provide a snapshot of the unculturable protist diversity thriving the benthic zone of ive athalossohaline lagoons across the Andean plateau.
dc.description.sponsorshipGerman Research Foundation (DFG): 268236062, SFB1211, SPP 1991, NI 1097/4 Deutscher Akademischer Austausch Dienst (DAAD): 57440921
dc.identifier.doi10.3389/fmicb.2024.1356977
dc.identifier.issn1664-302X
dc.identifier.urihttps://repositorioabierto.uantof.cl/handle/uantof/692
dc.language.isoen
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceFrontiers in Microbiology
dc.titleProtist communities of microbial mats from the extreme environments of five saline Andean lagoons at high altitudes in the Atacama Desert
dc.typeArticle
oaire.citation.volume15
organization.identifier.rorUniversidad de Antofagasta
uantof.identificator.departmentDepartamento de Biotecnología
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