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Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa
Bibliography: pages 85-95.
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Department of Biological Sciences
2016
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| _version_ | 1867613247987777536 |
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| access_status_str | Open Access |
| author | Brown, Penelope Cranstoun |
| author2 | Field, John G |
| author_browse | Brown, Penelope Cranstoun Field, John G |
| author_facet | Field, John G Brown, Penelope Cranstoun |
| author_sort | Brown, Penelope Cranstoun |
| collection | Thesis |
| description | Bibliography: pages 85-95. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/17605 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:07.122Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Biological Sciences |
| publisherStr | Department of Biological Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/17605 Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa Brown, Penelope Cranstoun Field, John G Hay, C Zoology Bibliography: pages 85-95. 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. 2016-03-09T09:07:27Z 2016-03-09T09:07:27Z 1980 Master Thesis Masters MSc http://hdl.handle.net/11427/17605 eng application/pdf Department of Biological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Zoology Brown, Penelope Cranstoun Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa |
| thesis_degree_str | Master's |
| title | Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa |
| title_full | Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa |
| title_fullStr | Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa |
| title_full_unstemmed | Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa |
| title_short | Phytoplankton production studies in the coastal waters off the Cape Peninsula, South Africa |
| title_sort | phytoplankton production studies in the coastal waters off the cape peninsula south africa |
| topic | Zoology |
| url | http://hdl.handle.net/11427/17605 |
| work_keys_str_mv | AT brownpenelopecranstoun phytoplanktonproductionstudiesinthecoastalwatersoffthecapepeninsulasouthafrica |