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dc.contributor.authorRaikar, V.
dc.contributor.authorWafar, M.V.M.
dc.date.accessioned2006-11-14T12:06:18Z
dc.date.available2006-11-14T12:06:18Z
dc.date.issued2006
dc.identifier.citationJournal of Experimental Marine Biology and Ecology, vol.339(2), 236-240p.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/492
dc.description.abstractSurge (non-linear) uptake of ammonium, measured by incorporation of 15N, was investigated in three species of macroalgae (Ulva lactuca Linnaeus (Chlorophyta), Soliera robusta (Greville) Kylin (Rhodophyta) and Dictyota dichotoma (Hudson) Lamouroux (Phaeophyta)) from Kavaratti atoll (Lakshadweep, India). Addition of ammonium (up to 20 mmol L-1) led to pronounced uptake within 4–6 min, with the amount of ammonium taken up during surge phase (<4 min) accounting for from about half to 10 times that taken up during the remaining period of incubation (5-30 min). Amount of ammonium taken up during surge related linearly to the concentration of ammonium given. Surge uptake in dark was also substantial, averaging 80% of that in light. Capability for rapid uptake of pulses of ammonium released by heterotrophs during day or night could thus be an important mechanism of survival and proliferation of macroalgae in the N-impoverished atoll waters.
dc.format.extent139647 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherElsevier
dc.rightsAn edited version of this paper was published by Elsevier. Copyright [2006] Elsevier
dc.subjectSurge uptake
dc.subjectCoral reefs
dc.titleSurge ammonium uptake in macroalgae from a coral atoll
dc.typeJournal Article


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