Surge ammonium uptake in macroalgae from a coral atoll

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dc.contributor.author Raikar, V.
dc.contributor.author Wafar, M.V.M.
dc.date.accessioned 2006-11-14T12:06:18Z
dc.date.available 2006-11-14T12:06:18Z
dc.date.issued 2006
dc.identifier.citation Journal of Experimental Marine Biology and Ecology, vol.339(2), 236-240p.
dc.identifier.uri http://drs.nio.org/drs/handle/2264/492
dc.description.abstract Surge (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.extent 139647 bytes
dc.format.mimetype application/pdf
dc.language.iso en
dc.publisher Elsevier
dc.rights An edited version of this paper was published by Elsevier. Copyright [2006] Elsevier
dc.subject Surge uptake
dc.subject Coral reefs
dc.title Surge ammonium uptake in macroalgae from a coral atoll
dc.type Journal Article


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