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 20 of 112 for “"kelp"”.
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Unlocking the potential of remote sensing for kelp biomass estimation in South African Kelp Concession Areas
… has the potential to improve the accuracy of kelp biomass estimates, ensuring the implementation of sustainable harvesting. However, definitive research on the potential of HRI in this application is lacking in the current literature. An accurate estimation of kelp biomass is crucial to …
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Restoring and valuing global kelp forest ecosystems
Kelp forests cover ~30% of the world’s coastline and are the largest biogenic marine habitat on earth. Across their distribution, kelp forests are essential for the healthy functioning of marine ecosystems and consequently underpin many of the benefits coastal societies receive from the ocean. …
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Population Genomics of the Sugar Kelp Saccharina latissima
… the management and conservation of wild kelp forests in the face of a changing climate.<br/>This thesis aimed to address this challenge through the investigation of genetic<br/>differentiation and connectivity in the widespread foundation kelp species Saccharina latissima over a range of …
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Effects of turbidity on the kelp Ecklonia radiata
… performance of foundational species, such as kelp, are affected by turbidity. This research combined field studies across a large-scale turbidity gradient in the Hauraki Gulf, north-eastern New Zealand, and mesocosm experiments, to determine the effects of turbidity, and light, on the …
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Stable isotope ecology of South African kelp forests
Kelp forests are some of the most productive coastal ecosystems in the world and provide numerous ecosystem goods and services. Where they occur, they play a key role in coastal ecology and local fisheries. In South Africa, Ecklonia maxima and Laminaria pallida form kelp forests which support …
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Sources and supply of kelp detritus : quantifying mechanisms of production
… rocky reefs dominated by extremely productive kelp beds export considerable primary production. Despite the extensive body of work on kelp detritus as a trophic subsidy, many questions remain about the production of this detritus. The aim of this thesis was to determine the rate and mechanisms …
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Stranded kelp : its fauna and influence on sandy beach energetics.
… results of studies conducted on banks of kelp stranded on a sandy beach at Kommetjie on the west coast of the Cape Peninsula. The physical and chemical character of the beach are related to variations in the standing stocks and productivity of macro-, meio-fauna and bacteria as determined …
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Distribution and biomass of epiphytic seaweeds on the kelp Ecklonia maxima (Osbeck) Papenfuss, and the potential effects of two kelp-harvesting methods in the Western Cape
The demand for freshly harvested kelp, Ecklonia maxima, in the Western Cape, has greatly increased due to the need for fodder to supply the growing abalone industry. There is evidence suggesting that the present demand may exceed the amount of E. maxima available, if the traditional method of …
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Predicting the ecosystem effects of harvesting beach-cast kelp for biofuel
Beach-cast kelp (principally Laminaria spp.), known as macroalgal wrack, has been suggested as a feedstock for biofuel. However, to be extracted sustainably it is necessary to understand its ecological role and predict the impacts of its removal. Field-based observations combined with food web …
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Substrate dependant survivorship of Ecklonia maxima, in southern African kelp communities
… stipe lengths and substrate attachment for all kelps were recorded at four sites off the Cape Peninsula. Strength of attachment to different substrates was measured. Selection for substrate type was analysed using Jacobs' index. A substrate of Pyura stolonifera was the most common for juveniles, …
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Mapping and assessing ecosystem threat status of South African kelp forests
At a global scale, kelp forests play a significant ecological, social and economic role through their provision of ecosystem services. South African kelp forests are no exception and recent studies have established their value. To maintain these benefits, informed management is needed. An …
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Ecological Effects of Overwater Structures on Subtidal Kelp, Northern Puget Sound, Washington
… created shade to the seafloor. Subtidal kelp, over 20 species in total, are abundant in the Sound but little data exists on how they are impacted by these overwater structures. The purpose of this research is to quantify various overwater structures’ impacts on the productivity and …
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Elevated temperatures create bottlenecks in the life history of bull kelp (Nereocystis luetkeana, Phaeophyceae)
The bull kelp Nereocystis luetkeana has declined in parts of the Salish Sea due to local and global change factors, including rising sea surface temperatures. As a foundation species, its loss has broad impacts on biodiversity and nearshore ecosystem function, underscoring the need to identify and …
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Investigations into the harvesting ecology of the South African kelp Ecklonia maxima (Alariaceae, Laminariales)
… this thesis examined the distribution of kelp biomass, at various sites around the Cape Peninsula and on the west coast, and at different depths within sites. An attempt was made to calculate a single figure that could be used in determining the biomass of kelp beds.
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Effects of commercial kelp extract and plant growth regulators on growth of Gracilaria gracilis in culture
… addition of a local commercial seaweed extract (Kelpak®) to crop plants has proven to be beneficial as it improves growth and yields. Its efficiency has been attributed to its production method that involves a cold process, resulting in a product containing significant amounts of plant growth …
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A study of the distribution of algae in the Two Oceans Aquarium, Kelp Tank, Cape Town
… seaweed community has established itself in the Kelp tank. The seaweeds were brought in as either epiphytes on mature macro algae or as epiphytes on boulders that were placed on the floor of the tank. Thus, the community in the tank can be assumed to have established itself naturally. This study …
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Investigations into the functioning of phytoplankton, zooplankton, kelp and benthic communities at the Prince Edward Islands
Abstract Several questions pertaining to the marine communities at the Prince Edward Islands are addressed. Firstly, the nature of the 'island-mass effect', and the cause of the frequently recorded diatom blooms in the area are examined. It had been suggested that the cause of the blooms is related …
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Climate change impacts on macro and micro scale interactions between a tropical herbivore and temperate kelp forests
… this has already strengthened some herbivore- kelp interactions in some regions and contributed to the loss of kelp, the reef’s main foundation species. Warming stress can also alter the algal microbiome, which in turn influences algal health, and there is the potential that this may affect …
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