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Insights into Antarctic microbiomes: diversity patterns for terrestrial and marine habitats

Authors :
AMANDA G. BENDIA
JULIO CEZAR F. MOREIRA
JULIANA C.N. FERREIRA
RENATO G. ROMANO
IVAN G.C. FERREIRA
DIEGO C. FRANCO
HEITOR EVANGELISTA
ROSALINDA C. MONTONE
VIVIAN HELENA PELLIZARI
Source :
Anais da Academia Brasileira de Ciências, Vol 95, Iss suppl 3 (2023)
Publication Year :
2023
Publisher :
Academia Brasileira de Ciências, 2023.

Abstract

Abstract Microorganisms in Antarctica are recognized for having crucial roles in ecosystems functioning and biogeochemical cycles. To explore the diversity and composition of microbial communities through different terrestrial and marine Antarctic habitats, we analyze 16S rRNA sequence datasets from fumarole and marine sediments, soil, snow and seawater environments. We obtained measures of alpha- and beta-diversities, as well as we have identified the core microbiome and the indicator microbial taxa of a particular habitat. Our results showed a unique microbial community structure according to each habitat, including specific taxa composing each microbiome. Marine sediments harbored the highest microbial diversity among the analyzed habitats. In the fumarole sediments, the core microbiome was composed mainly of thermophiles and hyperthermophilic Archaea, while in the majority of soil samples Archaea was absent. In the seawater samples, the core microbiome was mainly composed by cultured and uncultured orders usually identified on Antarctic pelagic ecosystems. Snow samples exhibited common taxa previously described for habitats of the Antarctic Peninsula, which suggests long-distance dispersal processes occurring from the Peninsula to the Continent. This study contributes as a baseline for further efforts on evaluating the microbial responses to environmental conditions and future changes.

Details

Language :
English
ISSN :
16782690 and 00013765
Volume :
95
Issue :
suppl 3
Database :
Directory of Open Access Journals
Journal :
Anais da Academia Brasileira de Ciências
Publication Type :
Academic Journal
Accession number :
edsdoj.50672dc1198f48d6a6a10e5f9b98aa93
Document Type :
article
Full Text :
https://doi.org/10.1590/0001-3765202320211442