Shallow subtidal seaweed communities of the Agulhas Marine Province of South Africa

 

Show simple item record

dc.contributor.advisor Bolton, John J en_ZA
dc.contributor.advisor Anderson, R J en_ZA
dc.contributor.author Wilby, Deborah en_ZA
dc.date.accessioned 2014-11-05T17:41:25Z
dc.date.available 2014-11-05T17:41:25Z
dc.date.issued 2009 en_ZA
dc.identifier.citation Wilby, D. 2009. Shallow subtidal seaweed communities of the Agulhas Marine Province of South Africa. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/9274
dc.description Includes bibliographical references (leaves 84-92). en_ZA
dc.description.abstract Several aspects of seaweed ecology are poorly studied and documented in South Africa, especially the subtidal algal communities along the south coast. This study aims to investigate these communities where few other studies have been conducted. Sampling of shallow subtidal seaweed communities was undertaken at eleven sites along the south coast of South Africa from Still Bay to Mzamba. At each site a number of quadrats were placed within the shallow subtidal zone ranging in depth from O.3m to 2.5m. Within these quadrats all algae were destructively sampled (excluding encrusting algae), invertebrate grazers present were counted, and environmental measurements were taken. These environmental measurements included depth and slope, with temperature data supplied from a previous study. The biogeographical communities of this area were investigated using Detrended Correspondence Analysis, Canonical Correspondence Analysis and cluster analysis, in order to compare them with previous studies on the marine biogeography of the area. In the 85 quadrats that were sampled, 97 species of Chlorophyta, Phaeophyta and Rhodophyta were found. Articulated (or geniculate) coralline red algae were very abundant in the samples, with 17 species that contributed over 44 of the biomass. There was a high number of other red algal species (54 species) but they represented only 10 of the total biomass. Green algal species were not very common (there were only 12 species) but they contributed 42 to the biomass. There were a similar number of brown algal species (14), although they only contributed 2 of the total biomass. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Botany en_ZA
dc.title Shallow subtidal seaweed communities of the Agulhas Marine Province of South Africa en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Biological Sciences en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Wilby, D. (2009). <i>Shallow subtidal seaweed communities of the Agulhas Marine Province of South Africa</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/9274 en_ZA
dc.identifier.chicagocitation Wilby, Deborah. <i>"Shallow subtidal seaweed communities of the Agulhas Marine Province of South Africa."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2009. http://hdl.handle.net/11427/9274 en_ZA
dc.identifier.vancouvercitation Wilby D. Shallow subtidal seaweed communities of the Agulhas Marine Province of South Africa. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 2009 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/9274 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Wilby, Deborah AB - Several aspects of seaweed ecology are poorly studied and documented in South Africa, especially the subtidal algal communities along the south coast. This study aims to investigate these communities where few other studies have been conducted. Sampling of shallow subtidal seaweed communities was undertaken at eleven sites along the south coast of South Africa from Still Bay to Mzamba. At each site a number of quadrats were placed within the shallow subtidal zone ranging in depth from O.3m to 2.5m. Within these quadrats all algae were destructively sampled (excluding encrusting algae), invertebrate grazers present were counted, and environmental measurements were taken. These environmental measurements included depth and slope, with temperature data supplied from a previous study. The biogeographical communities of this area were investigated using Detrended Correspondence Analysis, Canonical Correspondence Analysis and cluster analysis, in order to compare them with previous studies on the marine biogeography of the area. In the 85 quadrats that were sampled, 97 species of Chlorophyta, Phaeophyta and Rhodophyta were found. Articulated (or geniculate) coralline red algae were very abundant in the samples, with 17 species that contributed over 44 of the biomass. There was a high number of other red algal species (54 species) but they represented only 10 of the total biomass. Green algal species were not very common (there were only 12 species) but they contributed 42 to the biomass. There were a similar number of brown algal species (14), although they only contributed 2 of the total biomass. DA - 2009 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2009 T1 - Shallow subtidal seaweed communities of the Agulhas Marine Province of South Africa TI - Shallow subtidal seaweed communities of the Agulhas Marine Province of South Africa UR - http://hdl.handle.net/11427/9274 ER - en_ZA


Files in this item

This item appears in the following Collection(s)

Show simple item record