The effect of organic carbon and nitrogen additions on inorganic nitrogen uptake by phytoplankton and bacteria

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dc.contributor.advisorProbyn, Trevoren_ZA
dc.contributor.authorVan Wijk, Kimen_ZA
dc.date.accessioned2016-03-28T14:44:41Z
dc.date.available2016-03-28T14:44:41Z
dc.date.issued1991en_ZA
dc.descriptionBibliography: pages 76-89.en_ZA
dc.description.abstractThis study examines the effects of enrichment with organic carbon and nitrogen on inorganic nitrogen partitioning between phyto- and bacterio- plankton. Strongly preferential uptake of ammonium over nitrate was observed by both the phytoplanktonic and bacterial fractions, with RPINH4 values typically between 1 and 5. The bacterial fraction ( <0.8μm) was found to be responsible for as much as 48-75% of community uptake of ammonium; while the netplanktonic fraction was observed to take up approximately 50% of intact community uptake of nitrate. The addition of amino acids appeared to mediate bacterial competition for ammonium, indicating their preference for DON as a nitrogen source and allowing increased ammonium uptake by the nanoplanktonic fraction. The effect of glucose enrichment was complicated by the presence of protozoans, which appeared to be indirectly responsible for decreased ammonium uptake due to depletion of this substrate in the presence of added glucose. The nanoplankton appeared to be responsible for the least nitrogen uptake with respect to biomass, indicating that they may have been subject to competition pressure from both the bacterial and netplanktonic fractions.en_ZA
dc.identifier.apacitationVan Wijk, K. (1991). <i>The effect of organic carbon and nitrogen additions on inorganic nitrogen uptake by phytoplankton and bacteria</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Oceanography. Retrieved from http://hdl.handle.net/11427/18342en_ZA
dc.identifier.chicagocitationVan Wijk, Kim. <i>"The effect of organic carbon and nitrogen additions on inorganic nitrogen uptake by phytoplankton and bacteria."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Oceanography, 1991. http://hdl.handle.net/11427/18342en_ZA
dc.identifier.citationVan Wijk, K. 1991. The effect of organic carbon and nitrogen additions on inorganic nitrogen uptake by phytoplankton and bacteria. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Van Wijk, Kim AB - This study examines the effects of enrichment with organic carbon and nitrogen on inorganic nitrogen partitioning between phyto- and bacterio- plankton. Strongly preferential uptake of ammonium over nitrate was observed by both the phytoplanktonic and bacterial fractions, with RPINH4 values typically between 1 and 5. The bacterial fraction ( <0.8μm) was found to be responsible for as much as 48-75% of community uptake of ammonium; while the netplanktonic fraction was observed to take up approximately 50% of intact community uptake of nitrate. The addition of amino acids appeared to mediate bacterial competition for ammonium, indicating their preference for DON as a nitrogen source and allowing increased ammonium uptake by the nanoplanktonic fraction. The effect of glucose enrichment was complicated by the presence of protozoans, which appeared to be indirectly responsible for decreased ammonium uptake due to depletion of this substrate in the presence of added glucose. The nanoplankton appeared to be responsible for the least nitrogen uptake with respect to biomass, indicating that they may have been subject to competition pressure from both the bacterial and netplanktonic fractions. DA - 1991 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1991 T1 - The effect of organic carbon and nitrogen additions on inorganic nitrogen uptake by phytoplankton and bacteria TI - The effect of organic carbon and nitrogen additions on inorganic nitrogen uptake by phytoplankton and bacteria UR - http://hdl.handle.net/11427/18342 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/18342
dc.identifier.vancouvercitationVan Wijk K. The effect of organic carbon and nitrogen additions on inorganic nitrogen uptake by phytoplankton and bacteria. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Oceanography, 1991 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18342en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Oceanographyen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherPhytoplanktonen_ZA
dc.titleThe effect of organic carbon and nitrogen additions on inorganic nitrogen uptake by phytoplankton and bacteriaen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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