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Bacterial Diversity at a Shallow-Water Hydrothermal Vent (Espalamaca) in Azores Island


Affiliations
1 Biological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa 403 004, India
2 IMAR-Department of Oceanography and Fisheries, University of Azores, Rua Prof Frederico Machado 9901-862, Horta, Portugal
 

A low-temperature shallow-water hydrothermal vent field was discovered during the summer of 2010 in the Faial-Pico channel off the Espalamaca headland, Faial Island, Azores, Portugal, NE Atlantic. The present study analyses bacterial communities present in shallowwater hydrothermal vent of Espalamaca using SSU rRNA-based clone library approach. Clones of shallow vent sediment sample revealed the dominance of Proteobacteria (including α, γ, ε, δ, ζ subdivisions) and Bacteroidetes with 36% and 28% of the whole community respectively. The dominance of γ-Proteobacteria is the unique characteristic of this shallow vent and it coincides with the South Tonga Arc and Bahía Concepción (Pacific Ocean), whereas ε- Proteobacteria groups were reported to be high in the majority of the hydrothermal vents. Though the sampling sites of the venting and non-venting regions of Espalamaca were only 500 m apart, high variation (>80%) of phylotypes was found between the regions.

Keywords

Bacterial Diversity, Clone Library, Hydrothermal Vent, Phylogeny, Shallow Water.
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  • Bacterial Diversity at a Shallow-Water Hydrothermal Vent (Espalamaca) in Azores Island

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Authors

Raju Rajasabapathy
Biological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa 403 004, India
Chellandi Mohandass
Biological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa 403 004, India
Raul Bettencourt
IMAR-Department of Oceanography and Fisheries, University of Azores, Rua Prof Frederico Machado 9901-862, Horta, Portugal
Ana Colaço
IMAR-Department of Oceanography and Fisheries, University of Azores, Rua Prof Frederico Machado 9901-862, Horta, Portugal
Joana Goulart
IMAR-Department of Oceanography and Fisheries, University of Azores, Rua Prof Frederico Machado 9901-862, Horta, Portugal
Ram Murti Meena
Biological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa 403 004, India

Abstract


A low-temperature shallow-water hydrothermal vent field was discovered during the summer of 2010 in the Faial-Pico channel off the Espalamaca headland, Faial Island, Azores, Portugal, NE Atlantic. The present study analyses bacterial communities present in shallowwater hydrothermal vent of Espalamaca using SSU rRNA-based clone library approach. Clones of shallow vent sediment sample revealed the dominance of Proteobacteria (including α, γ, ε, δ, ζ subdivisions) and Bacteroidetes with 36% and 28% of the whole community respectively. The dominance of γ-Proteobacteria is the unique characteristic of this shallow vent and it coincides with the South Tonga Arc and Bahía Concepción (Pacific Ocean), whereas ε- Proteobacteria groups were reported to be high in the majority of the hydrothermal vents. Though the sampling sites of the venting and non-venting regions of Espalamaca were only 500 m apart, high variation (>80%) of phylotypes was found between the regions.

Keywords


Bacterial Diversity, Clone Library, Hydrothermal Vent, Phylogeny, Shallow Water.

References





DOI: https://doi.org/10.18520/cs%2Fv115%2Fi11%2F2110-2121