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Biologically induced alternative states in two rocky subtidal benthic communities
This thesis is concerned with the contrasting communities that occur in the subtidal zones of two closely situated islands in Saldanha Bay on the west coast of South Africa: Both are guano islands, supporting substantial populations of seabirds. They have a similar bottom topography and experience s...
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| Format: | Thesis |
| Language: | English |
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Department of Biological Sciences
2016
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| _version_ | 1867613312559087616 |
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| access_status_str | Open Access |
| author | Barkai, Amos |
| author2 | Branch, George M |
| author_browse | Barkai, Amos Branch, George M |
| author_facet | Branch, George M Barkai, Amos |
| author_sort | Barkai, Amos |
| collection | Thesis |
| description | This thesis is concerned with the contrasting communities that occur in the subtidal zones of two closely situated islands in Saldanha Bay on the west coast of South Africa: Both are guano islands, supporting substantial populations of seabirds. They have a similar bottom topography and experience similar physical conditions. Despite these similarities their subtidal benthic communities are however, radically different. Marcus Island has prolific beds of the black mussel Choromytilus meridionalis, accompanied by a large number of other species, notably the sea urchin Parechinus angulosus, the holothurians Pentacta doliolum, Thyone aurea and Trachythyone insolens, large population of whelks, mostly Burnupena spp. and the barnacles Austromegabalanus cylindricus and Notomegabalanus algicola. In contrast, Malgas Island is dominated by a large population of the rock lobster Jasus lalandii together with a dense seaweed flora, and has small numbers of the ribbed mussel Aulacomya ater and the whelks Argobuccinum pustulosum and Burnupena papyracea. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/21935 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:34:08.683Z |
| 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:11427/21935 Biologically induced alternative states in two rocky subtidal benthic communities Barkai, Amos Branch, George M Zoology This thesis is concerned with the contrasting communities that occur in the subtidal zones of two closely situated islands in Saldanha Bay on the west coast of South Africa: Both are guano islands, supporting substantial populations of seabirds. They have a similar bottom topography and experience similar physical conditions. Despite these similarities their subtidal benthic communities are however, radically different. Marcus Island has prolific beds of the black mussel Choromytilus meridionalis, accompanied by a large number of other species, notably the sea urchin Parechinus angulosus, the holothurians Pentacta doliolum, Thyone aurea and Trachythyone insolens, large population of whelks, mostly Burnupena spp. and the barnacles Austromegabalanus cylindricus and Notomegabalanus algicola. In contrast, Malgas Island is dominated by a large population of the rock lobster Jasus lalandii together with a dense seaweed flora, and has small numbers of the ribbed mussel Aulacomya ater and the whelks Argobuccinum pustulosum and Burnupena papyracea. 2016-09-25T16:51:52Z 2016-09-25T16:51:52Z 1987 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/21935 eng application/pdf Department of Biological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Zoology Barkai, Amos Biologically induced alternative states in two rocky subtidal benthic communities |
| thesis_degree_str | Doctoral |
| title | Biologically induced alternative states in two rocky subtidal benthic communities |
| title_full | Biologically induced alternative states in two rocky subtidal benthic communities |
| title_fullStr | Biologically induced alternative states in two rocky subtidal benthic communities |
| title_full_unstemmed | Biologically induced alternative states in two rocky subtidal benthic communities |
| title_short | Biologically induced alternative states in two rocky subtidal benthic communities |
| title_sort | biologically induced alternative states in two rocky subtidal benthic communities |
| topic | Zoology |
| url | http://hdl.handle.net/11427/21935 |
| work_keys_str_mv | AT barkaiamos biologicallyinducedalternativestatesintworockysubtidalbenthiccommunities |