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Microbial Diversity Analysis in the Oxygen Minimum Zones of the Arabian Sea using Metagenomics Approach


Affiliations
1 Molecular Biology Research Laboratory, Centre for Advanced Studies, Department of Zoology, Savitribai Phule Pune University, Pune 411 007, India
2 ISRO Chair Professor, ISRO Space and Techn ology Cell, Savitribai Phule Pune University, Pune 411 007, India
 

Large oxygen-depleted areas known as oxygen minimum zones (OMZs) have been reported from the Arabian Sea, and recent reports indicate that these areas are expanding at an alarming rate. In marine waters, oxygen depletion may also be related to global warming and temperature rise. The acidification and deoxygenation due to OMZs can lead to major consequences wherein the plants, fish and other biota will struggle to survive in the ecosystem. The present study has identified the microbial community structure using next generation sequencing-based metagenomics analysis in water sa mples collected at different depths from the OMZs and non-OMZs of the Arabian Sea. Environmental variables such as depth, site of collection and oxygen concentration might influence species richness and evenness among microbial communities in these locations. Our observations suggest that population dynamics of microbes consisting of nitrate reducers accompanied by sulphate reducers and sulphur oxidizers influences the interconnected geoche mical cycles of OMZs. In addition to providing baseline data related to the diversity and microbial community dynamics in waters in the OMZs; such analysis can provide insight into processes regulating productivity and ecological co mmunity structure of the ocean.

Keywords

Bacterial Diversity, Metagenomics, Microbial Communities, Oxygen Minimum Zones.
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  • Microbial Diversity Analysis in the Oxygen Minimum Zones of the Arabian Sea using Metagenomics Approach

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Authors

Mandar S. Paingankar
Molecular Biology Research Laboratory, Centre for Advanced Studies, Department of Zoology, Savitribai Phule Pune University, Pune 411 007, India
Kedar Ahire
Molecular Biology Research Laboratory, Centre for Advanced Studies, Department of Zoology, Savitribai Phule Pune University, Pune 411 007, India
Pawan Mishra
Molecular Biology Research Laboratory, Centre for Advanced Studies, Department of Zoology, Savitribai Phule Pune University, Pune 411 007, India
Shriram Rajpathak
Molecular Biology Research Laboratory, Centre for Advanced Studies, Department of Zoology, Savitribai Phule Pune University, Pune 411 007, India
Deepti D. Deobagkar
ISRO Chair Professor, ISRO Space and Techn ology Cell, Savitribai Phule Pune University, Pune 411 007, India

Abstract


Large oxygen-depleted areas known as oxygen minimum zones (OMZs) have been reported from the Arabian Sea, and recent reports indicate that these areas are expanding at an alarming rate. In marine waters, oxygen depletion may also be related to global warming and temperature rise. The acidification and deoxygenation due to OMZs can lead to major consequences wherein the plants, fish and other biota will struggle to survive in the ecosystem. The present study has identified the microbial community structure using next generation sequencing-based metagenomics analysis in water sa mples collected at different depths from the OMZs and non-OMZs of the Arabian Sea. Environmental variables such as depth, site of collection and oxygen concentration might influence species richness and evenness among microbial communities in these locations. Our observations suggest that population dynamics of microbes consisting of nitrate reducers accompanied by sulphate reducers and sulphur oxidizers influences the interconnected geoche mical cycles of OMZs. In addition to providing baseline data related to the diversity and microbial community dynamics in waters in the OMZs; such analysis can provide insight into processes regulating productivity and ecological co mmunity structure of the ocean.

Keywords


Bacterial Diversity, Metagenomics, Microbial Communities, Oxygen Minimum Zones.

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DOI: https://doi.org/10.18520/cs%2Fv118%2Fi7%2F1042-1051