Nitrogen uptake by phytoplankton and zooxanthellae in a coral atoll

Show simple item record

dc.contributor.author Wafar, M.V.M.
dc.contributor.author Devassy, V.P.
dc.contributor.author Slawyk, G.
dc.contributor.author Goes, J.I.
dc.contributor.author Jayakumar, D.A.
dc.contributor.author Rajendran, A.
dc.date.accessioned 1995-06-13T10:01:11Z
dc.date.accessioned 2017-09-29T13:48:26Z
dc.date.available 1995-06-13T10:01:11Z
dc.date.available 2017-09-29T13:48:26Z
dc.date.issued 1985
dc.identifier.citation Proceedings of Fifth International Coral Reef Congress, Tahiti, 27 may - 1 June 1985. Vol. 6. vol.6; 1985; 29-37
dc.identifier.uri http://drs.nio.org/drs/handle/2264/6347
dc.description.abstract This paper describes the nitrogen uptake, measured by assimilation of @u15@@N - labelled nitrate, ammonium, urea and @u14@@C - labelled urea, by phytoplankton, intact corals and freshly isolated zooxanthellae from the Kavaratti Atoll of the Lakshadweep Archipelago (Indian Ocean). This paper also presents the ambient concentrations of these nitrogenous nutrients in the lagoon and surrounding waters. In addition, the excretion of these nitrogen compounds by major coral species of the atoll was also measured. Based on these data, and in conjunction with microbiological studies carried out, nitrogen dynamics in the coral atoll ecosystem located in the nitrogen-impoverished oceanic waters is discussed. NH@d4@ is the principal form in which N is excreted by corals, and the rates varied from 223 to 775 ng-at (mg coral tissue) @u-1@@h@u-1@@ in 4 species. Urea excretion forms about 5% of total N excreted. N balance (NH@d4@@, urea, NO@d3@@) calculated from 4 species of corals shows that zooxanthellae can derive all their N requirements from coral excretion alone, and that about 80% of the N taken up by zooxanthellae is translocated to corals in 4 hours
dc.language en
dc.relation.isbasedon 5th International Coral Reef Congress, Tahiti, 27 may - 1 June 1985. Vol. 6
dc.relation.isreferencedby NON-SCI
dc.subject Aquatic Communities
dc.subject.other Atolls
dc.subject.other Food Conversion
dc.subject.other Nitrogen
dc.subject.other Zooxanthellae
dc.subject.other Phytoplankton
dc.subject.other ISW, India, Laccadive I.
dc.title Nitrogen uptake by phytoplankton and zooxanthellae in a coral atoll
dc.type Conference Article
dc.affiliation.author CSIR-National Institute of Oceanography, Dona Paula, Goa, India


Files in this item

Files Size Format View

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record

Search DRS


Advanced Search

Browse

My Account