Effects of hydrography on the distribution of bacteria and virus in Cochin Estuary, India

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dc.contributor.author Parvathi, A.
dc.contributor.author Jasna, V.
dc.contributor.author Jina, S.
dc.contributor.author Jayalakshmy, K.V.
dc.contributor.author Lallu, K.R.
dc.contributor.author Madhu, N.V.
dc.contributor.author Muraleedharan, K.R.
dc.contributor.author NaveenKumar, K.R.
dc.contributor.author Balachandran, K.K.
dc.date.accessioned 2015-02-17T05:16:39Z
dc.date.available 2015-02-17T05:16:39Z
dc.date.issued 2015
dc.identifier.citation Ecological Research, 30(1); 85-92
dc.identifier.uri http://drs.nio.org/drs/handle/2264/4696
dc.description.abstract The viral dynamics have rarely been investigated in estuarine environments of India. The present study brings out a first hand information on the distribution of virus and bacteria in an eutrophic estuary (Cochin, India). Thirteen stations were selected for monthly monitoring of bacterial abundance (BA), total viable bacterial count (TVC), viral abundance (VA), chlorophyll a (Chl a) and other water quality parameters (temperature, salinity, pH, dissolved oxygen and inorganic nutrients such as NO<sub>3</sub>–N, NH<sub>4</sub>–N, PO<sub>4</sub>–P and SiO<sub>4</sub>–Si) for 1 year. There was significant variations in the VA [0.59–4.48 × 10<sup>7</sup>viral like particles (VLPs) mL<sup>-1</sup>] and BA (0.49–8.12 × 10<sup>6</sup> cells mL<sup>-1</sup>) in the estuary. The variation in the viral to bacterial ratio (3–22) indicated marked seasonality. Statistical analysis showed bacteria as a major factor controlling the distribution of viruses (60 % variability) in Cochin estuary (CE). The viruses also showed positive correlations with Chl a, pH and salinity. The distribution of virus followed a distinct pattern of three different zones in the estuary controlled by salinity in zone I, Chl a in zone II and salinity, Chl a in zone III. The zonal distribution suggests that the factors that control the viral-host systems vary in different areas due to the complex hydrography of the estuary and environmental changes are very sensitive to the viral population in CE
dc.language.iso en
dc.publisher Ecological Society of Japan
dc.rights An edited version of this paper was published by Springer. This paper is for R & D purpose and Copyright [2014] The Ecological Society of Japan.
dc.subject Brackishwater environment
dc.subject viruses
dc.subject bacteria
dc.subject population
dc.subject seasonality
dc.title Effects of hydrography on the distribution of bacteria and virus in Cochin Estuary, India
dc.type Journal Article


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