Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"sub-Antarctic Islands"”.
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The effects of introduced mice on seabirds breeding at sub-Antarctic Islands
… of extinction. Introduced predators at oceanic islands where many seabirds breed account for the largest proportion of population declines, more so than incidental fisheries bycatch or degradation of their breeding habitats. Since few oceanic islands have escaped invasion, the problem is …
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Plankton dynamics of the open Southern Ocean and surrounding the (Sub)Antarctic islands
… poorly understood, particularly around the many (Sub)Antarctic islands where physical and biogeochemical variability is high. The major motivation for the work presented in this thesis is an improved understanding of the role of the plankton system in Southern Ocean fertility and carbon export, …
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Hydrochemical dynamics on sub-Antarctic Marion Island
Although sub-Antarctic maritime environments are some of the most sensitive regions to climate change, investigations into isotopic and hydrochemical dynamics on sub-Antarctic islands are limited. To address this, the Soft Plume River on sub-Antarctic Marion Island was sampled daily along an …
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The population status, breeding success and foraging ecology of Phoebetria albatrosses on Marion Island
… from the removal of predatory fish and squid. Sub-Antarctic islands are important breeding grounds for many seabirds, including albatrosses. Monitoring of seabirds breeding on sub-Antarctic islands is important to detect changes in population dynamics to be able to implement timely conservation …
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Late Quaternary relative sea level change in the South Shetland Islands, Antarctica
… of ice sheet volumes and extent over the Antarctic Peninsula and sub-Antarctic islands during the Last Glacial Maximum (LGM), and their contribution to sea level rise during subsequent deglaciation remains uncertain. The use of precise relative sea level (RSL) data offers great potential …
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Long-term climate variability at the Prince Edward Islands in the Southern Ocean
… and global warming, has many implications on the sub-Antarctic Islands in the SO. Due to the distance away from continental land these islands experience an oceanic climate, making them the perfect sentinels to climate change in this sector of the Southern Ocean. Studies have proposed that climate …
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Some studies on the genus Acaena
The species of Acaena (Rosaceae) growing on the sub-Antarctic island of South Georgia have been examined from two different aspects - the world level and the insular level. A revision of the taxonomy and synonymy of the two sections of the genus containing A.tenera and A.magellanica has resulted in …
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Investigating ecological drivers and impacts of vegetation change in sub Antarctic tundra
… in response to the key drivers of change in the sub-Antarctic, focusing on Marion Island (MI). Given the recent origin and relative species poverty of the sub-Antarctic flora, changes in vegetation are expected to result from individual responses rather than collective trends across the entire …
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Understanding and mitigating seabird bycatch in the South African pelagic longline fishery
… face additional mortality both on their breeding islands from introduced predators and at sea by fishing fleets, as fisheries bycatch, as well as other human impacts. Seabird bycatch has negatively affected many seabird populations worldwide, with trawl, gillnet and longline fisheries considered …