Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa

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dc.contributor.advisorField, John Gen_ZA
dc.contributor.advisorHay, Cen_ZA
dc.contributor.authorBrown, Penelope Cranstounen_ZA
dc.date.accessioned2016-03-09T09:07:27Z
dc.date.available2016-03-09T09:07:27Z
dc.date.issued1980en_ZA
dc.descriptionBibliography: pages 85-95.en_ZA
dc.description.abstractProcedures for measuring phytoplankton production in the southern Benguela upwelling region were investigated. A 125 ml incubation bottle is recommended for routine primary production measurements. Exposure of production samples to high light intensities during manipulations on deck was found to inhibit rates of production near the bottom of the euphotic zone particularly below a thermocline. Simulated in situ rates of oxygen production were only slightly higher than in situ rates. When ships time is limited, the simulated in situ method can safely be used in local waters. Definite diel periodicity in rates of production at the sea surface was demonstrated and appears to be linked to light levels and nutrient concentrations, as well as to the ratios of light to dark hours. Since diel variation probably decreases with depth, its effect on integrated daily production is reduced. Nevertheless, the time of incubation should be chosen to minimize the effect of periodicity on daily production estimates. The period spanning noon is recommended for local use. Changes in phytoplankton production and biomass are linked with physical and chemical changes in the upwelling system off the Cape Peninsula. Extremely active upwelling was found to limit primary production and from these measurements the annual net primary production in the Cape Peninsula upwelling region is estimated for the first time to be approximately 1.13 kgC.m⁻ ³.y⁻¹.en_ZA
dc.identifier.apacitationBrown, P. C. (1980). <i>Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/17605en_ZA
dc.identifier.chicagocitationBrown, Penelope Cranstoun. <i>"Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1980. http://hdl.handle.net/11427/17605en_ZA
dc.identifier.citationBrown, P. 1980. Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Brown, Penelope Cranstoun AB - Procedures for measuring phytoplankton production in the southern Benguela upwelling region were investigated. A 125 ml incubation bottle is recommended for routine primary production measurements. Exposure of production samples to high light intensities during manipulations on deck was found to inhibit rates of production near the bottom of the euphotic zone particularly below a thermocline. Simulated in situ rates of oxygen production were only slightly higher than in situ rates. When ships time is limited, the simulated in situ method can safely be used in local waters. Definite diel periodicity in rates of production at the sea surface was demonstrated and appears to be linked to light levels and nutrient concentrations, as well as to the ratios of light to dark hours. Since diel variation probably decreases with depth, its effect on integrated daily production is reduced. Nevertheless, the time of incubation should be chosen to minimize the effect of periodicity on daily production estimates. The period spanning noon is recommended for local use. Changes in phytoplankton production and biomass are linked with physical and chemical changes in the upwelling system off the Cape Peninsula. Extremely active upwelling was found to limit primary production and from these measurements the annual net primary production in the Cape Peninsula upwelling region is estimated for the first time to be approximately 1.13 kgC.m⁻ ³.y⁻¹. DA - 1980 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1980 T1 - Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa TI - Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa UR - http://hdl.handle.net/11427/17605 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/17605
dc.identifier.vancouvercitationBrown PC. Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1980 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17605en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Biological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherZoologyen_ZA
dc.titlePhytoplankton production studies in the coastal waters off the Cape Peninsula, South Africaen_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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