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Please use this identifier to cite or link to this item: http://hdl.handle.net/2264/1089

Title: Tidal switch on metabolic activity: Salinity induced responses on bacterioplankton metabolic capabilities in a tropical estuary
Authors: Thottathil, S.D.
Balachandran, K.K.
Jayalakshmy, K.V.
Gupta, G.V.M.
Nair, S.
Citation: Estuarine, Coastal and Shelf Science, vol.78(4); 665-673p.
Issue Date: 2008
Publisher: Elsevier
Abstract: Biolog plates were used to study the changes in the metabolic capabilities of bacterioplankton over a complete tidal cycle in a tropical ecosystem (Cochin Estuary, Kerala, India) along southwest coast of India. The pattern of utilization of carbon sources showed a definite shift in the community metabolism along a salinity gradient. Multivariate statistical analysis revealed two communities, namely allochthonous bacterioplankton sensitive to salinity and autochthonous bacterioplankton, which are tolerant to wide salinity fluctuations. Regression analysis showed salinity as the most important parameter influencing the physiological profile of bacterioplankton, irrespective of tide. Apart from salinity, limno-tolerant retrievable counts and halo-tolerant retrievable counts also accounted for the metabolic variation of bacterioplankton during low and high tides, respectively. The shift in the substrate utilization from carbohydrates to amino acids appears to be due to the physiological adaptation or nitrogen limitation of bacterial community with increasing salinity.
Document type: Journal Article
Copyright: Copyright Elsevier[2008]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice that the rights are violated then the item would be withdrawn.
URI: http://hdl.handle.net/2264/1089
Appears in Collections:Biological Sciences

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