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Metagenomic exploration of Andaman region of the Indian Ocean
Prasoodanan, V.P.K.; Kumar, S.; Dhakan, D.B.; Waiker, P.; Saxena, R.; Sharma, V.K. (2024). Metagenomic exploration of Andaman region of the Indian Ocean. NPG Scientific Reports 14(1): 2717. https://dx.doi.org/10.1038/s41598-024-53190-1
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322
Peer reviewed article  
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  • Prasoodanan, V.P.K.
  • Kumar, S.
  • Dhakan, D.B.
  • Waiker, P.
  • Saxena, R.
  • Sharma, V.K.
Abstract
    Ocean microbiome is crucial for global biogeochemical cycles and primary productivity. Despite numerous studies investigating the global ocean microbiomes, the microbiome composition of the Andaman region of the Indian Ocean remains largely unexplored. While this region harbors pristine biological diversity, the escalating anthropogenic activities along coastal habitats exert an influence on the microbial ecology and impact the aquatic ecosystems. We investigated the microbiome composition in the coastal waters of the Andaman Islands by 16S rRNA gene amplicon and metagenomic shotgun sequencing approaches and compared it with the Tara Oceans Consortium. In the coastal waters of the Andaman Islands, a significantly higher abundance and diversity of Synechococcus species was observed with a higher abundance of photosynthesis pigment-related genes to adapt to variable light conditions and nutrition. In contrast, Prochlorococcus species showed higher abundance in open ocean water samples of the Indian Ocean region, with a relatively limited functional diversity. A higher abundance of antibiotic-resistance genes was also noted in the coastal waters region. We also updated the ocean microbiome gene catalog with 93,172 unique genes from the Andaman coastal water microbiome. This study provides valuable insights into the Indian Ocean microbiome and supplements the global marine microbial ecosystem studies.
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