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Journal Articles Diversity Year : 2022

Contrasting Impact of Viral Activity on Prokaryotic Populations in the Coastal and Offshore Regions of the Eastern Arabian Sea

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Abstract

first_pagesettingsOrder Article Reprints Open AccessArticle Contrasting Impact of Viral Activity on Prokaryotic Populations in the Coastal and Offshore Regions of the Eastern Arabian Sea by PK Shruthi 1,2,Ammini Parvathi 1,2,*,Angia Sriram Pradeep Ram 3,Shyla Hafza 1,2,Jose K. Albin 2,Erathodi Rajagopalan Vignesh 2,Jaleel Abdul 2 andTelesphore Sime-Ngando 3ORCID 1 Department of Biotechnology, Cochin University of Science and Technology, Kochi 682022, Kerala, India 2 National Institute of Oceanography-CSIR, Regional Centre, Dr. Salim Ali Road, Kochi 682018, Kerala, India 3 Laboratoire Microorganismes: Génome et Environnement (UMR CNRS 6023), Université Clermont-Auvergne, 1 Impasse Amélie Murat, CEDEX, 63178 Aubière, France * Author to whom correspondence should be addressed. Diversity 2022, 14(3), 230; https://doi.org/10.3390/d14030230 Received: 21 January 2022 / Revised: 7 March 2022 / Accepted: 17 March 2022 / Published: 21 March 2022 (This article belongs to the Special Issue Ecology of Microbes in Marine and Estuarine Ecosystems) Download Browse Figures Versions Notes Abstract Viral processes in the coastal and offshore regions of the Eastern Arabian Sea (west coast of India) and their contribution of viral lysis to the organic carbon and nitrogen pool was examined. Water samples were collected during the southwest monsoon season at different depths (up to 1000 m) from four transects, with each transect consisting of two sampling points (S1–S8). Abundances of viruses and prokaryotes together with viral mediated prokaryotic mortality (up to 49.7%) were significantly (p < 0.001) higher in eutrophic coastal stations, whereas high percent lysogeny (up to 93%) was observed in the offshore regions. High viral-mediated carbon (Mean ± SD = 67.47 ± 2.0 μM C L−1 d−1) and nitrogen (Mean ± SD = 13.49 ± 14.0 μM N L−1 d−1) release was evident in the surface coastal waters compared to offshore regions. The percentage contributions of carbon and nitrogen released by viral lysis to the total dissolved organic carbon and nitrogen pool were estimated to be 7.4% and 3.9%, respectively, in the coastal surface waters. Our findings suggest that the contribution of viral lysis to DOM production through viral shunt could be crucial for the cycling of major biogeochemical elements and functioning of the studied tropical ecosystem.
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hal-03865128 , version 1 (22-11-2022)

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P K Shruthi, Ammini Parvathi, Angia Sriram Pradeep Ram, Shyla Hafza, Jose K Albin, et al.. Contrasting Impact of Viral Activity on Prokaryotic Populations in the Coastal and Offshore Regions of the Eastern Arabian Sea. Diversity, 2022, 14 (3), pp.230. ⟨10.3390/d14030230⟩. ⟨hal-03865128⟩
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