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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A Mosaic of Geothermal and Marine Features Shapes Microbial Community Structure on Deception Island Volcano, Antarctica

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Author(s):
Bendia, Amanda G. [1] ; Signori, Camila N. [1] ; Franco, Diego C. [1] ; Duarte, Rubens T. D. [1] ; Bohannan, Brendan J. M. [2] ; Pellizari, Vivian H. [1]
Total Authors: 6
Affiliation:
[1] Univ Sao Paulo, Inst Oceanog, Dept Oceanog Biol, Sao Paulo - Brazil
[2] Univ Oregon, Dept Biol, Inst Ecol & Evolut, Eugene, OR 97403 - USA
Total Affiliations: 2
Document type: Journal article
Source: FRONTIERS IN MICROBIOLOGY; v. 9, MAY 7 2018.
Web of Science Citations: 4
Abstract

Active volcanoes in Antarctica contrast with their predominantly cold surroundings, resulting in environmental conditions capable of selecting for versatile and extremely diverse microbial communities. This is especially true on Deception Island, where geothermal, marine, and polar environments combine to create an extraordinary range of environmental conditions. Our main goal in this study was to understand how microbial community structure is shaped by gradients of temperature, salinity, and geochemistry in polar marine volcanoes. Thereby, we collected surface sediment samples associated with fumaroles and glaciers at two sites on Deception, with temperatures ranging from 0 to 98 degrees C. Sequencing of the 16S rRNA gene was performed to assess the composition and diversity of Bacteria and Archaea. Our results revealed that Deception harbors a combination of taxonomic groups commonly found both in cold and geothermal environments of continental Antarctica, and also groups normally identified at deep and shallow-sea hydrothermal vents, such as hyperthermophilic archaea. We observed a clear separation in microbial community structure across environmental gradients, suggesting that microbial community structure is strongly niche driven on Deception. Bacterial community structure was significantly associated with temperature, pH, salinity, and chemical composition; in contrast, archaeal community structure was strongly associated only with temperature. Our work suggests that Deception represents a peculiar ``open-air{''} laboratory to elucidate central questions regarding molecular adaptability, microbial evolution, and biogeography of extremophiles in polar regions. (AU)

FAPESP's process: 12/11037-0 - Microbial indicators of climatic changes in extreme environment samples from maritime Antarctica
Grantee:Rubens Tadeu Delgado Duarte
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 12/23241-0 - Metagenomic of microbial communities from environments with geothermal activity at Deception Island Volcano, Antarctica
Grantee:Amanda Gonçalves Bendia
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 16/16183-5 - Chemosynthetic contribution to the carbon cycle in abyssal zones of Rio Grande Rise (Southwestern Atlantic Ocean)
Grantee:Camila Negrão Signori
Support Opportunities: Scholarships in Brazil - Post-Doctoral