Journal cover Journal topic
Biogeosciences An interactive open-access journal of the European Geosciences Union
Journal topic
Discussion papers
https://doi.org/10.5194/bg-2019-330
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-2019-330
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 29 Aug 2019

Submitted as: research article | 29 Aug 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Biogeosciences (BG).

High-throughput screening of sediment bacterial communities from Oxygen Minimum Zones of the northern Indian Ocean

Jovitha Lincy1,2 and Cathrine Manohar1,2 Jovitha Lincy and Cathrine Manohar
  • 1Biological Oceanography Division, CSIR-National Institute of Oceanography (NIO), Goa-403004, India
  • 2Academy of Scientific and Innovative Research (AcSIR), CSIR-NIO Campus, Goa, India

Abstract. The Northern Indian Ocean host two recognized Oxygen Minimum Zones (OMZ): one in the Arabian Sea and the other in the Bay of Bengal region. The next-generation sequencing technique was used to understand the total bacterial diversity from the surface sediment of off Goa within the OMZ of Arabian Sea, and from off Paradip within the OMZ of Bay of Bengal. The dominant phyla identified include Firmicutes (33.06 %) and Proteobacteria (32.44 %) from the Arabian Sea, and Proteobacteria (52.51 %) and Planctomycetes (8.63 %) from the Bay of Bengal. Statistical analysis indicates that bacterial diversity from sediments of the Bay of Bengal OMZ is ~ 48 % higher than the Arabian Sea OMZ. Diverse candidate bacterial clades were also detected, whose function is unknown, but many of these were reported from other OMZs as well, suggesting their putative role in sediment biogeochemistry. Bacterial diversity from the present study reveals that the off Paradip site of Bay of Bengal OMZ is highly diverse and unexplored in comparison to the off Goa site of the Arabian Sea OMZ. Functional diversity analysis indicates that the relative percentage distribution of genes involved in methane, nitrogen, sulfur and many unclassified energy metabolisms is almost the same in both sites, reflecting a similar ecological role, irrespective of the differences in phylotypic diversity.

Jovitha Lincy and Cathrine Manohar
Interactive discussion
Status: open (until 19 Oct 2019)
Status: open (until 19 Oct 2019)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Jovitha Lincy and Cathrine Manohar
Jovitha Lincy and Cathrine Manohar
Viewed  
Total article views: 99 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
82 17 0 99 7 0 1
  • HTML: 82
  • PDF: 17
  • XML: 0
  • Total: 99
  • Supplement: 7
  • BibTeX: 0
  • EndNote: 1
Views and downloads (calculated since 29 Aug 2019)
Cumulative views and downloads (calculated since 29 Aug 2019)
Viewed (geographical distribution)  
Total article views: 70 (including HTML, PDF, and XML) Thereof 69 with geography defined and 1 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 19 Sep 2019
Publications Copernicus
Download
Short summary
The study compares the sediment bacterial community structure within the oxygen minimum zone (OMZ) of the Arabian Sea and the Bay of Bengal. Bacterial diversity analysis reveals that the off Paradip site of Bay of Bengal OMZ is highly diverse and unexplored in comparison to the off Goa site of the Arabian Sea OMZ. It is also interesting to note that even though the phylogenetic diversity was different, the relative contribution of functional genes was almost the same.
The study compares the sediment bacterial community structure within the oxygen minimum zone...
Citation