Metabolic potential and survival strategies of microbial communities across extreme temperature gradients on Deception Island volcano, Antarctica

Autor(es)

Bendia, Amanda Goncalves ^[1] ; Lemos, Leandro Nascimento ^{[2, 3]} ; Mendes, Lucas William ^[2] ; Signori, Camila Negrao ^[1] ; Bohannan, Brendan J. M. ^[4] ; Pellizari, Vivian Helena ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Oceanog Biol, Inst Oceanog, Praca Oceanog191, BR-05508120 Sao Paulo, SP - Brazil

^[2] Univ Sao Paulo, Labt Biol Celular & Mol, Ctr Energia Nucl Agr, Ave Centenario 303, BR-1341600 Piracicaba, SP - Brazil

^[3] Dept Bioinformat, Lab Nacl Comp Cient, Av Getulio Vargas 333, Petropolis, RJ - Brazil

^[4] Univ Oregon, Dept Biol, Inst Ecol & Evolut, Eugene, OR 97403 - USA

• Tipo de documento: Artigo Científico
• Fonte: ENVIRONMENTAL MICROBIOLOGY; v. 23, n. 7, p. 4054-4073, JUL 2021.
• Citações Web of Science: 0

Resumo

Active volcanoes in Antarctica have remarkable temperature and geochemical gradients that could select for a wide variety of microbial adaptive mechanisms and metabolic pathways. Deception Island is a stratovolcano flooded by the sea, resulting in contrasting ecosystems such as permanent glaciers and active fumaroles, which creates steep gradients that have been shown to affect microbial diversity. In this study, we used shotgun metagenomics and metagenome-assembled genomes to explore the metabolic potentials and survival strategies of microbial communities along an extreme temperature gradient in fumarole and glacier sediments on Deception Island. We observed that communities from a 98 degrees C fumarole were significantly enriched in genes related to hyperthermophilic (e.g. reverse gyrase, GroEL/GroES and thermosome) and oxidative stress responses, as well as genes related to sulfate reduction, ammonification and carbon fixation. Communities from <80 degrees C fumaroles possessed more genes related osmotic, cold- and heat-shock responses, and diverse metabolic potentials, such as those related to sulfur oxidation and denitrification, while glacier communities showed abundant metabolic potentials mainly related to heterotrophy. Through the reconstruction of genomes, we were able to reveal the metabolic potentials and different survival strategies of underrepresented taxonomic groups, especially those related to Nanoarchaeota, Pyrodictiaceae and thermophilic ammonia-oxidizing archaeal lineages. (AU)

• Processo FAPESP: 12/23241-0 - Metagenoma de comunidades microbianas de ambientes com atividade geotermal na Ilha Vulcânica Deception, Antártica
• Beneficiário: Amanda Gonçalves Bendia
• Modalidade de apoio: Bolsas no Brasil - Doutorado