The effect of chlorine, heat and physical stress on entrained plankton at Koeberg Nuclear Power Station

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dc.contributor.advisorCook, Peteren_ZA
dc.contributor.authorHuggett, Jenny Aen_ZA
dc.date.accessioned2016-02-17T07:15:33Z
dc.date.available2016-02-17T07:15:33Z
dc.date.issued1988en_ZA
dc.descriptionBibliography: pages 112-138.en_ZA
dc.description.abstractThe large volume of seawater used for cooling at Koeberg Nuclear Power Station contains many planktonic organisms which are exposed to heat, chlorine and physical stress during their passage through the system. Phytoplankton biomass, measured as chlorophyll a, was reduced by an average of 55.32% due to entrainment, and productivity was decreased by 38.30% on average, mainly due to chlorination. Zooplankton mortality averaged 22.34% for all species and 30.52% for copepods, the dominant group. The copepod Paracartia africana was used in laboratory experiments designed to simulate entrainment. Latent mortality was monitored up to 60 hours after a 30-minute application of stress factors (physical stress was not simulated), and approximately 75% of the total mortality occurred within the 30-minute period. Male Paracartia experienced higher mortalities than females. Extrapolation of these results predicts an overall entrainment mortality (including latent mortality) of 40% for copepods and 29.04% for total zooplankton, although the latter cannot be substantiated. Plankton entrainment at Koeberg was not considered to be overly detrimental to the marine environment because of the very localised area affected, rapid dispersion of heat and chlorine, rapid regeneration times of phytoplankton and some zooplankton, low abundance of commercially important species and potential recruitment from the surrounding productive Benguela upwelling region.en_ZA
dc.identifier.apacitationHuggett, J. A. (1988). <i>The effect of chlorine, heat and physical stress on entrained plankton at Koeberg Nuclear Power Station</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/17079en_ZA
dc.identifier.chicagocitationHuggett, Jenny A. <i>"The effect of chlorine, heat and physical stress on entrained plankton at Koeberg Nuclear Power Station."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1988. http://hdl.handle.net/11427/17079en_ZA
dc.identifier.citationHuggett, J. 1988. The effect of chlorine, heat and physical stress on entrained plankton at Koeberg Nuclear Power Station. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Huggett, Jenny A AB - The large volume of seawater used for cooling at Koeberg Nuclear Power Station contains many planktonic organisms which are exposed to heat, chlorine and physical stress during their passage through the system. Phytoplankton biomass, measured as chlorophyll a, was reduced by an average of 55.32% due to entrainment, and productivity was decreased by 38.30% on average, mainly due to chlorination. Zooplankton mortality averaged 22.34% for all species and 30.52% for copepods, the dominant group. The copepod Paracartia africana was used in laboratory experiments designed to simulate entrainment. Latent mortality was monitored up to 60 hours after a 30-minute application of stress factors (physical stress was not simulated), and approximately 75% of the total mortality occurred within the 30-minute period. Male Paracartia experienced higher mortalities than females. Extrapolation of these results predicts an overall entrainment mortality (including latent mortality) of 40% for copepods and 29.04% for total zooplankton, although the latter cannot be substantiated. Plankton entrainment at Koeberg was not considered to be overly detrimental to the marine environment because of the very localised area affected, rapid dispersion of heat and chlorine, rapid regeneration times of phytoplankton and some zooplankton, low abundance of commercially important species and potential recruitment from the surrounding productive Benguela upwelling region. DA - 1988 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1988 T1 - The effect of chlorine, heat and physical stress on entrained plankton at Koeberg Nuclear Power Station TI - The effect of chlorine, heat and physical stress on entrained plankton at Koeberg Nuclear Power Station UR - http://hdl.handle.net/11427/17079 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/17079
dc.identifier.vancouvercitationHuggett JA. The effect of chlorine, heat and physical stress on entrained plankton at Koeberg Nuclear Power Station. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1988 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/17079en_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.otherMarine plankton - South Africaen_ZA
dc.subject.otherNuclear power plants - Environmental aspects - South Africaen_ZA
dc.subject.otherChlorine - Physiological effecten_ZA
dc.subject.otherCopepodaen_ZA
dc.titleThe effect of chlorine, heat and physical stress on entrained plankton at Koeberg Nuclear Power Stationen_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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