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dc.contributor.authorRam, A.S.P.
dc.contributor.authorNair, S.
dc.contributor.authorChandramohan, D.
dc.date.accessioned2007-07-18T07:37:38Z
dc.date.available2007-07-18T07:37:38Z
dc.date.issued2007
dc.identifier.citationMicrobial Ecology, vol. 53(4); 591-599pp.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/622
dc.description.abstractBacterial growth efficiency (BGE) is a key factor in understanding bacterial influence on carbon flow in aquatic ecosystems. Intra-annual variability in BGE, and bacteria-mediated carbon flow in the tropical Mandovi and Zuari estuaries (southwest India) and the adjoining coastal waters (Arabian Sea) is reported here. BGE ranged from 3% to 61% and showed clear temporal variability with significantly (ANOVA, p <0.01) higher values in the estuaries (mean, 28 ± 14%) than coastal waters (mean, 12 ± 6%). The greater variability of BGE in the estuaries than coastal waters suggest some systematic response to nutrient composition and the variability of dissolved organic matter pools, as BGE was governed by bacterial secondary production (BP). Monsoonal rains and its accompanied changes brought significant variability in BGE and bacterial productivity/primary productivity (BP/PP) ratio when compared to nonmonsoon seasons in the estuaries and coastal waters. High BP/PP ratio (>1) together with high carbon flux through bacteria (>100% of primary productivity) in the estuarine and coastal waters suggests that bacterioplankton consumed dissolved organic carbon in excess of the amount produced in situ by phytoplankton of this region, which led to the mismatch between primary production of carbon and amount of carbon consumed by bacteria. Despite the two systems being subsidized by allochthonous inputs, the low BGE in the coastal waters may be attributable to the nature and time interval in the supply of allochthonous carbon.
dc.format.extent390982 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherSpringer
dc.rightsAn edited version of this paper is published by Springer. Copyright Springer [2007]
dc.subjectmicroorganisms
dc.subjectestuaries
dc.subjectgrowth
dc.subjectseasonal variations
dc.subjectecosystems
dc.subjectbiological production
dc.subjectallochthonous deposits
dc.subjectheterotrophic organisms
dc.subjectorganic carbon
dc.titleBacterial growth efficiency in a tropical estuary: Seasonal variability subsidized by allochthonous carbon
dc.typeJournal Article


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