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dc.contributor.authorJasna, J.
dc.contributor.authorParvathi, A.
dc.contributor.authorPradeepRam, A. S.
dc.contributor.authorNair, M.
dc.contributor.authorTelesphore, S-M.
dc.date.accessioned2025-01-17
dc.date.accessioned2025-01-21T10:49:55Z
dc.date.available2024-09-05
dc.date.available2025-01-21T10:49:55Z
dc.date.issued2024
dc.identifier.citationEnvironmental Monitoring and Assessment, vol.196(11);2024;pp.1117
dc.identifier.issn1573-2959
dc.identifier.otherhttps://link.springer.com/article/10.1007/s10661-024-13176-y#citeas
dc.identifier.urihttps://doi.org/10.1007/s10661-024-13176-y
dc.identifier.urihttp://drs.nio.res.in/drs/handle/2264/9348
dc.descriptionIF2023=2.9
dc.description.abstractThe coastal waters of Kerala, in the South Eastern Arabian Sea (SEAS), are unique during the Southwest monsoon season due to the concurrent occurrence of two physical processes, the upwelling and Mudbanks. However, little is known about the viral ecology and activity in a system where upwelling and Mudbanks coexist, though it is generally recognized that microbial assemblages play a vital role in the food web dynamics of marine systems, particularly in upwelling. Water samples were taken from monsoon and pre-monsoon period from three locations, (M1, M2, and M3) off Alappuzha, on the southwest coast of India to examine the viral activity and distribution. The dissolved oxygen levels showed the incursion of hypoxic waters in all the stations during the peak upwelling period. Upwelling signals were prominent in all the stations, but Mudbank and upwelling co-occurred at M2 alone during monsoon. The abundance of viruses ranged from 0.86 to 15.68? ?106 Viral-like Particles (VLPs mL?1) and prokaryotic abundance ranged from 2.73 16.26? ?105 cells mL?1. Viral and prokaryotic abundance was significantly higher in the monsoon compared to pre and late-monsoon. Based on Transmission electron microscopy (TEM) results, the non-tailed viruses constituted the major (43%) proportion of the total viruses in this study region. However, the viral production rates and viral-mediated bacterial mortality were high in the pre-monsoon compared to the monsoon and late-monsoon periods. There was no obvious effect of Mudbanks on viral dynamics and the observed variations in virological and hydrological features were governed mainly by coastal upwelling.
dc.languageen
dc.publisherSpringer
dc.relation.isreferencedbySCI
dc.rightsOnly the author version of the copright reserved papers uploaded. Contact drs@nio.org for any complaints regarding copyright violations
dc.titleMicrobial distribution in Mudbank regions off Alappuzha, South-West coast of India
dc.affiliation.authorDepartment of Marine Biology, Microbiology and Biochemistry, Cochin University of Science and Technology, Cochin Kerala India


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