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dc.contributor.authorBurford, MA
dc.date.accessioned2017-05-03T14:13:37Z
dc.date.available2017-05-03T14:13:37Z
dc.date.issued2005
dc.date.modified2010-08-25T07:03:23Z
dc.identifier.issn0018-8158
dc.identifier.doi10.1007/s10750-005-1702-3
dc.identifier.urihttp://hdl.handle.net/10072/4324
dc.description.abstractThe relative role of the organic nitrogen source, urea, versus ammonium as a nitrogen source for two species of dinoflagellates was compared with one species of cyanobacteria. Experiments were conducted opportunistically in nutrient-rich marine water during blooms of 34either cyanobacteria or dinoflagellates in outdoor mesocosms. These replicate mesocosms, which were stocked with shrimp fed high-protein formulated feeds, contained high biomasses of phytoplankton (mean chlorophyll a concentrations, 439.2-811.2 姠l-1). 15N-urea and ammonium uptake rates for dinoflagellate-dominated blooms (Gymnodinium pulchellum-complex (Larsen), Karlodinium micrum (Larsen) (Dinophyceae)) were compared with blooms of the cyanobacterium, Romeria sp. (Cyanophyceae) in mesocosms with mean urea and ammonium concentrations ranging from 2.32 to 3.24 卬 and 7.39 to 64.85 卬 respectively. Urea uptake rates were significantly (p < 0.005) lower than ammonium uptake rates irrespective of which algal species dominated the bloom. Additionally urea uptake rates were not significantly higher in G. pulchellum-complex or K. micrum-dominated blooms than in Romeria sp. blooms. These results suggest that G pulchellum complex and K. micrum may not be gaining a competitive advantage in waters high in dissolved organic matter simply by preferentially utilizing urea. The periodic dominance of these species in highly organic environments, such as shrimp ponds, is likely to have a more complex explanation.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent61352 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.language.isoen_AU
dc.publisherSpringer Science + Business Media
dc.publisher.placeBerlin, Germany
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom297
dc.relation.ispartofpageto303
dc.relation.ispartofjournalHydrobiologia
dc.relation.ispartofvolume549
dc.rights.retentionY
dc.subject.fieldofresearchEarth Sciences
dc.subject.fieldofresearchEnvironmental Sciences
dc.subject.fieldofresearchBiological Sciences
dc.subject.fieldofresearchcode04
dc.subject.fieldofresearchcode05
dc.subject.fieldofresearchcode06
dc.titleRelative uptake of urea and ammonium by dinoflagellates or cyanobacteria in shrimp mesocosms
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith School of Environment
gro.rights.copyright© 2005 Springer. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. The original publication is available at www.springerlink.com
gro.date.issued2005
gro.hasfulltextFull Text
gro.griffith.authorBurford, Michele A.


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