The long-term effect of elevated CO₂ on grassland biomass production

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dc.contributor.advisorStock, WDen_ZA
dc.contributor.authorAsary, Melanieen_ZA
dc.date.accessioned2017-05-24T07:08:56Z
dc.date.available2017-05-24T07:08:56Z
dc.date.issued1996en_ZA
dc.description.abstractThis study investigates the influence of elevated CO₂ on grassland biomass production at a naturally elevated CO₂ spring situated on the Bongwan gas fault in Natal. The effect of elevated CO₂ on monocotyledenous (C₄) and dicotyledenous (C₃) above ground plant biomass production and their dominance patterns along a CO₂ gradient were studied. Three 7x7m plots were located 18m, 39m and 73m away from the elevated CO₂ spring. The 18m site was the experimental site, while the other two sites were the controls. The primary focus of the study was to determine the biomass production of monocotyledenous and dicotyledenous plants at the above-mentioned distance from the spring. However, to ascertain possible factors that could influence the increase in biomass production with distance from the CO₂ source, plant nutrient analyses (N and P), soil moisture contents (which could have an effect on plant wateruse efficiency) and carbon isotope discrimination values were determined at the three sites. The results show that elevated CO₂ had a significant effect on the monocotyledenous dry matter production, but had no significant effect on any of the other plants or soil. It was also shown that elevated CO₂ increased the soil water retention capacity as one moves toward the spring, however this result is not confirmed.en_ZA
dc.identifier.apacitationAsary, M. (1996). <i>The long-term effect of elevated CO₂ on grassland biomass production</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/24401en_ZA
dc.identifier.chicagocitationAsary, Melanie. <i>"The long-term effect of elevated CO₂ on grassland biomass production."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1996. http://hdl.handle.net/11427/24401en_ZA
dc.identifier.citationAsary, M. 1996. The long-term effect of elevated CO₂ on grassland biomass production. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Asary, Melanie AB - This study investigates the influence of elevated CO₂ on grassland biomass production at a naturally elevated CO₂ spring situated on the Bongwan gas fault in Natal. The effect of elevated CO₂ on monocotyledenous (C₄) and dicotyledenous (C₃) above ground plant biomass production and their dominance patterns along a CO₂ gradient were studied. Three 7x7m plots were located 18m, 39m and 73m away from the elevated CO₂ spring. The 18m site was the experimental site, while the other two sites were the controls. The primary focus of the study was to determine the biomass production of monocotyledenous and dicotyledenous plants at the above-mentioned distance from the spring. However, to ascertain possible factors that could influence the increase in biomass production with distance from the CO₂ source, plant nutrient analyses (N and P), soil moisture contents (which could have an effect on plant wateruse efficiency) and carbon isotope discrimination values were determined at the three sites. The results show that elevated CO₂ had a significant effect on the monocotyledenous dry matter production, but had no significant effect on any of the other plants or soil. It was also shown that elevated CO₂ increased the soil water retention capacity as one moves toward the spring, however this result is not confirmed. DA - 1996 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1996 T1 - The long-term effect of elevated CO₂ on grassland biomass production TI - The long-term effect of elevated CO₂ on grassland biomass production UR - http://hdl.handle.net/11427/24401 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/24401
dc.identifier.vancouvercitationAsary M. The long-term effect of elevated CO₂ on grassland biomass production. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1996 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/24401en_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.otherBotanyen_ZA
dc.titleThe long-term effect of elevated CO₂ on grassland biomass productionen_ZA
dc.typeBachelor Thesis
dc.type.qualificationlevelHonours
dc.type.qualificationnameBSc (Hons.)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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