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 29 for “"anthropogenic threats"”.
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Assessing the anthropogenic threats to vultures in the communal farmlands of Namibia
… arrows. From my assessment, it appears that anthropogenic threats to vultures in communal areas are fairly low. The cultural use of vulture body parts is rare. In addition, poison is used but this practice is not nearly as common as it is on commercial farms. Since poison can have such …
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Effects of Turbidity on Anti-Predator Response and Foraging Behavior in the Fountain Darter, Etheostoma fonticola
Turbidity resulting from anthropogenic stressors poses a significant threat to freshwater systems and is occurring on a global scale. The pervasive impacts of turbidity include degraded visual ability resulting in altered animal behavior. Anti-predator response and successful foraging ability, both …
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Conservation Studies of Insect Cave Faunas in Mammoth Cave National Park and Ghana, West Africa
… role as an indicator species, since potential anthropogenic threats to the environment can be detected via population response. This was the initial implementation of a new monitoring method and a test of its efficacy was conducted by comparing observed trends to those of past studies. Of …
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Mating behavior and the effects of turbidity on preferences for size in the fountain darter, Etheostoma fonticola
Rising turbidity levels from anthropogenic stressors impact visual communication systems in aquatic communities and may affect the behavior of individual animals, including altering foraging and anti-predator behavior as well as mating preferences. The fountain darter, Etheostoma fonticola, is …
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Environmental Stewardship and the Virtuous Cycle: Pathways to Sustainability in a Coastal Context
Life on earth faces ongoing and growing anthropogenic threats. The need for sustainability through effective environmental stewardship is urgent, yet current concepts and frameworks are insufficient to achieve the sustainability agenda. Novel social-ecological research is required to better …
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Using environmental DNA metabarcoding to monitor fish biodiversity and assess anthropogenic barrier impacts on the river Mersey, UK
… of global biodiversity and are facing increased anthropogenic threats worldwide. Dams and weirs, for example, create habitat fragmentation, changing water flow and water levels, blocking crucial nutrients passing through river systems, and, above all, preventing crucial movements and migrations …
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The Sea is the Limit: Foraging Ecology of Breeding Antarctic Procellariiformes
… but also to assess and mitigate the impact of anthropogenic threats. In this thesis I examine the breeding-season foraging behaviour of several of the Procellariiformes, a wide-ranging, long-lived group of seabirds, many of which have experienced steep population declines since the mid-20th …
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Drivers of variation in the migration and foraging strategies of pelagic seabirds
… a cost in terms of increased mortality. Indeed, anthropogenic threats in non-breeding areas are a major cause of population declines and a better understanding of non-breeding spatial ecology is required in order to advance both ecological theory and conservation management. The recent …
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Instrumental conditioning and learning in Poroderma Pantherinum
… as data deficient on the IUCN red list and known threats due to anthropogenic impacts include fatalities because of bycatch and depredation in the small-scale commercial fishing industry. It has been suggested that sharks can be attracted to fishing boats through the sound of outboard motors and …
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The chiton fauna (Mollusca: Polyplacophora) of South Africa
… to assess their conservation status, given the anthropogenic threats these species face, including habitat destruction and possible unethical and unregulated collections.
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Investigating anthropogenic existential risks through art
… to answer the question of what can be done about anthropogenic threats to humankind. Local Warming is a large array of 72 collimated infrared emitting robotic heaters that provide a "bubble" of heat energy around the user as they pass through the installation. This project serves as an example of …
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Modeling risk of hunting pressure on large mammals in northwestern Argentina
… of the spatial distribution and magnitude of anthropogenic factors that may influence large mammal mortality due to potential human hunting pressure in a landscape linkage connecting these threatened forests. We conducted a literature review of Neotropical study sites that reported hunting of …
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Modeling risk of hunting pressure on large mammals in northwestern Argentina
… of the spatial distribution and magnitude of anthropogenic factors that may influence large mammal mortality due to potential human hunting pressure in a landscape linkage connecting these threatened forests. We conducted a literature review of Neotropical study sites that reported hunting of …
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Identifying drivers of Cape vulture (Gyps coprotheres) space use in southern Africa
… of worldwide vulture populations due to multiple anthropogenic threats is recognised as one of the most important issues in avian conservation due to the loss of the important ecosystem services that they provide. The Cape vulture (Gyps coprotheres) is endemic to southern Africa and is listed as …
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The Effects of Invasive Plants on Biodiversity Across Spatial Scales
… often considered to be one of the most notable anthropogenic threats to biodiversity, their influence on biodiversity remains controversial. Some studies have shown large declines in biodiversity in plant-invaded areas, whereas others have noted that plant invasions are rarely implicated as the …
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Unifying multi-source data and modeling perspectives to investigate connectivity and material transport in coastal river deltas
… coastline, where a range of natural and anthropogenic threats have led to substantial land loss over the last century. Due to the range of spatial and temporal scales involved, characterizing connectivity requires a multi-scale and multi-perspective approach that integrates numerical …
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The application of machine learning and 3D photogrammetry for cold-water coral habitat classification in the NE Atlantic
… habitats are subject to several climate and anthropogenic threats. Over the last two decades, research efforts to identify, map and manage these environments have increased along with the advances in data acquisition. Technologies such as remotely underwater vehicles are equipped with …
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Predation On The Eastern Oyster Crassostrea Virginica On Intertidal Reefs Affected By Recreational Boating
Widely regarded as a keystone species and ecosystem engineer, the eastern oyster Crassostrea virginica plays a vital role in estuarine environments. Complex, three-dimensional oyster reefs act as havens for biodiversity and contribute to ecological processes. Recently, concern for this resource has …
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BIO-ECOLOGICAL AND ANATOMICAL ASPECTS OF THE EUROPEAN EEL ANGUILLA ANGUILLA (L. 1758)
… they are subjected to cumulative effects of anthropogenic threats that resulted in worldwide decline since the beginning of the 20th century. Among the most iconic catadromous species, the European eel Anguilla anguilla (L.) has aroused considerable interest since ancient times, though, to …
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Coral conservation programmes in Bali, Indonesia: restoration of degraded reefs and localised socioeconomic benefits
… these ecosystem services have been threatened by anthropogenic threats, which continue to cause a worldwide decline in coral reef biodiversity, functioning and habitat structure. Even with global warming limited to 1.5oC (the IPCC’s most optimistic scenario), the projected future for coral reefs …
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