Temperature and elemental sulfur shape microbial communities in two extremely acidic aquatic volcanic environments

 

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Detalles Bibliográficos
Autores: Rojas Gätjens, Diego, Arce Rodríguez, Alejandro, Puente Sánchez, Fernando, Avendaño Vega, Roberto, Libby Hernández, Eduardo, Mora Amador, Raúl Alberto, Rojas Jiménez, Keilor Osvaldo, Fuentes Schweizer, Paola, Pieper, Dietmar H., Chavarría Vargas, Max
Formato: artículo original
Fecha de Publicación:2021
Descripción:Aquatic environments of volcanic origin provide an exceptional opportunity to study the adaptations of microbial communities to early planet life conditions such as high temperatures, high metal concentrations, and low pH. Here, we characterized the prokaryotic communities and physicochemical properties of seepage sites at the bottom of the Poas Volcano crater and the Agrio River, two geologically related extremely acidic environments located in the Central Volcanic mountain range of Costa Rica. Both locations hold a very low pH (pH 1.79-2.20) and have high sulfate and iron concentrations (Fe = 47-206 mg/L, SO42- = 1170-2460 mg/L measured as S), but significant differences in their temperature (90.0–95.0°C in the seepages at Poas Volcano versus 19.1–26.6 °C in Agrio River) and in the abundance of elemental sulfur. Based on the analysis of 16S rRNA gene sequences, we determined that Sulfobacillus spp., sulfur-oxidizing bacteria, represented more than half (58.4–78.4%) of the sequences in Poas Volcano seepage sites, while Agrio River was dominated by the iron- and sulfur-oxidizing Leptospirillum (7.4–55.5%) and members of the archeal order Thermoplasmatales (16.0-58.2%). Both environments share some chemical characteristics and part of their microbiota, however the temperature and the presence of reduced sulfur are likely the main distinguishing feature ultimately shaping their microbial communities. Our data suggest that in the Poas Volcano-Agrio River system there is a common metabolism but with specialization of species that adapt to the physicochemical conditions of each environment.
País:Kérwá
Institución:Universidad de Costa Rica
Repositorio:Kérwá
Lenguaje:Inglés
OAI Identifier:oai:https://www.kerwa.ucr.ac.cr:10669/82876
Acceso en línea:https://www.biorxiv.org/content/10.1101/2020.09.24.312660v1
https://link.springer.com/article/10.1007/s00792-020-01213-w
https://hdl.handle.net/10669/82876
Access Level:acceso abierto
Palabra clave:Costa Rica
Poas Volcano
Agrio River
Acidophiles
Leptospirillum
Sulfobacillus
Thermoplasmatales