Tidal switch on metabolic activity: Salinity induced responses on bacterioplankton metabolic capabilities in a tropical estuary
“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) along southwest coast of India. The pattern of utilization of carbon sources showed a definite shift in the community metabolism along...
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| Veröffentlicht in: | Estuarine, coastal and shelf science coastal and shelf science, 2008-07, Vol.78 (4), p.665-673 |
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| container_title | Estuarine, coastal and shelf science |
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| creator | Thottathil, Shoji D. Balachandran, K.K. Jayalakshmy, K.V. Gupta, G.V.M. Nair, Shanta |
| description | “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) 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. |
| doi_str_mv | 10.1016/j.ecss.2008.02.002 |
| format | Article |
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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. 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| ispartof | Estuarine, coastal and shelf science, 2008-07, Vol.78 (4), p.665-673 |
| issn | 0272-7714 1096-0015 |
| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Animal and plant ecology Animal, plant and microbial ecology Bacteria bacterioplankton Biolog Biological and medical sciences Brackish Brackish water ecosystems community Fundamental and applied biological sciences. Psychology salinity gradient Synecology tidal cycle tropical estuary |
| title | Tidal switch on metabolic activity: Salinity induced responses on bacterioplankton metabolic capabilities in a tropical estuary |
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