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 18 of 18 for “"invasive alien species"”.
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Fouled yachts : a vector for marine invasive alien species to South African shores?
… yachts is an important vector for marine invasive alien species (MIAS) in many countries. There are various characteristics of a vessel that make it more susceptible to hull fouling. Yachts in three Western Cape marinas were surveyed to assess extent of fouling, hull maintenance patterns, …
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Alien plant invasion on the Agulhas Plain : a detailed description of invasion patterns
Invasive alien species occur within several biodiverse regions of South Africa. It is not yet fully understood the extent to which invasive alien species affect natural vegetation. It is important to classify such species based on abundance and distribution in order to determine invasion patterns …
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Assessing the variations in alien plant communities within powerline corridors: A case study of Fundudzi and Khakhu Powerline Corridors
… patterns, and may also encourage the spread of alien plants. The spread of alien plants from one area to another through intentional and unintentional human activities is a serious threat to the world’s biodiversity, including that of South Africa. Vegetation management in powerline corridors in …
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An Investigation into the role of Allelopathy in influencing plant diversity around Lantana Camara groves
Invasive alien species have become a serious threat to plant biodiversity in many parts of the world. Globally the threat to biodiversity due to invasive alien species is considered second only to that of habitat loss. Invasive species are thus a serious impediment to conservation and sustainable …
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Modelling the current and potential distribution of woody plants, with special emphasis on the importance of spatial scale and environmental factors
The relationship between species distribution and environment has always been a central issue in ecology. The primary aim of this thesis is to explore the role of abiotic and biotic factors in mediating the distribution of woody plants, particularly invasive alien species. Predictions of the future …
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Rapid and portable molecular detection tools for reptile pest priority species in Australian environmental biosecurity scenarios
… pets has resulted in the introduction of many invasive alien species into novel environments. Reptiles are considered particularly high risk, with many global examples of their detrimental impacts on both local environments and economies. The trade in exotic pets facilitates the transport of …
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Remote sensing evaluation of Cape parrot habitat in the Eastern Cape: implications for conservation
… forest or the clearing of plantations and woody alien invasives. The overall accuracy of the classification was very high at 82%. Cross validated accuracies were all high ranging from 95 – 100%, with water having the highest accuracy and indigenous forest, eucalyptus spp., pine spp., and …
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"The Nonchalant Flick of the Carp's Tail": A Material Ecocritical Analysis of US Literature of Carp Introduction and Invasion
… moments: as a pond fish, a trash fish, and an invasive species, or invasive alien species (IAS). In addition, each chapter reads these works through a particular facet of material ecocriticism, most notably, that of assemblage formation and distributed agencies. Chapter One, "Pond Fish: The …
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The ecology of a recovering native predator: the European pine marten (Martes martes)
… Habitats predators would have existed in, and species predators would have existed alongside are typically highly degraded or entirely absent. Contemporary available habitats are human-modified, and often shared with humans, as well as numerous novel, human introduced species. Although early …
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Botanical processes in urban derelict spaces
… in pioneer communities. The majority of these species employing the expected strategies of early succession notably high reproductive capacity and seeds which are small, highly dispersive and form persistent seed banks. Dense seed banks were typically formed on sites and were dominated by a …
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Assessing environmental factors structuring populations and movement dynamics of the invasive snail Tarebia granifera in a subtropical Austral reservoir
Invasive alien species continue to spread and proliferate in waterways worldwide, but environmental drivers of invasion dynamics lack assessment. Understanding alien species ability to self-disperse via locomotion following arrival to new environments is also critical for prediction of invasion …
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Detecting exploitable stages in the life history of koi carp (Cyprinus carpio) in New Zealand
… of common carp (Cyprinus carpio L.) and are an invasive alien species to New Zealand. The introduction of koi carp to the lower Waikato River during the 1980s has coincided with a dramatic decline in water quality within the regions riverine lakes. Removing koi carp from riverine lakes may …
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Prevention, Control and Eradication of Aquatic Invasive Species
Invasive alien species (IAS) negatively impact freshwater ecosystems worldwide. As suppression and eradication techniques for established invader populations are often complex, costly and resource-intensive, the prevention of further invader spread is considered a key aspect of proactive management …
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Unraveling the Vibrational Communication of Halyomorpha halys and the Insecticidal Impact on its Key Parasitoid Trissolcus japonicus: Implications for Integrated Pest Management and Biological Control
… phenomenon at the global scale, orchestrated by invasive alien species, which are deemed harmful both economically and ecologically. One notorious invasive insect pest is the brown marmorated stink bug, Halyomorpha halys, which is causing significant economic losses in crop quality in Europe and …
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Invasive species: fundamental and applied science
Management of invasive alien species (IAS) is notoriously difficult, with many examples of expensive, failed attempts. While there is growing consensus that prevention is better than cure, successful prevention requires user-friendly, effective methods to quantify the ecological impacts of …
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Riistakameroiden käytön tuomat edut pienpetojen loukkupyynnissä Helsingin lintuvesillä
Helsingissä on kaksi linnustollisesti merkittävää kosteikkoaluetta; Vanhankaupunginlahden- ja Östersundomin lintuvedet. Molemmilla alueilla on sekä luonnonsuojelualueita, että Natura 2000 -suojelualueita ja runsaslajisen pesimälinnuston lisäksi niillä tavataan säännöllisesti myös harvinaisempia …