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.
Results
Showing 1 to 20 of 60 for “"biological communities"”.
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An assessment of the value of a small nature reserve, with particular reference to the Palmiet Nature Reserve, Westville, Natal
… small nature reserves of less than 100 ha. The biological, recreational and educational values of small nature reserves in general are assessed and management for multiple-use activities is considered. A specific example, the 35 ha urban reserve, the Palmiet Nature Reserve in Westville, Natal, …
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Ecological Assembly of Leaf-Litter Anuran Communities Across a Neotropical Land-Bridge Archipelago
… in time and space of richness and composition of biological communities has intrigued ecologists for decades. In this dissertation, I explore the patterns and ecological mechanisms that underlie the community assembly of leaf-litter anurans on a Neotropical archipelago. I combined experimental and …
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Disentangling Perceived and Measured Soil Health in New York City Urban Farms
… variables that consistently correlated with the biological communities in this study were respiration, pH, and magnesium. Many other soil variables affected the bacterial, fungal, and invertebrate communities individually; farmer perceptions of soil health were predictive of active carbon, …
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Verification of numerical models for hydrothermal plume water through field measurements at TAG
… providing a habitat for exotic chemosynthetic biological communities. Hydrothermal fluids are convected upwards until they cool and reach density equilibrium, at which point they advect laterally with the current. The neutrally buoyant plume layer can have length scales on the order of several …
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Applying the Reference Condition Approach to bioassessment of Cape Breton Island streams
… models. Results also show that healthy biological communities can be re-established at remediated sites but it may take a few years for full recovery. This baseline biological data will be used to track the progression of remediation programs in Cape Breton.
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Ecological Impact of Epigeal Termitaria on Vertebrates in the Tsavo Region of Southeast Kenya
… or food sources. The role of termite mounds in biological communities is relatively unknown, despite their ubiquitous nature. I investigated their impact on vertebrates in the Tsavo region of Kenya. Through the characterization of mounds, trapping, direct observation, and collecting microclimate …
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Verification of numerical models for hydrothermal plume water through field measurements at TAG
… providing a habitat for exotic chemosynthetic biological communities. Hydrothermal fluids are convected upwards until they cool and reach density equilibrium, at which point they advect laterally with the current. The neutrally buoyant plume layer can have length scales on the order of several …
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A paleozoological perspective on predator extermination and white-tailed deer (Odocoileus virginianus Boddaert) overabundance in central Texas.
… on deer populations and related components of biological communities in central Texas.
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A survey of the metazoan parasite assemblage of snoek, Thyrsites atun (Euphrasen, 1791), off South Africa with an assessment of host-parasite relationships and potential biological tags
… unacknowledged and understudied component of biological communities. However, their roles in structuring ecosystems, their influence on the evolutionary history of host species and their potential applications are slowly being uncovered. The snoek, Thyrsites atun, is a nomadic predator native …
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A comparison between macrofaunal communities on mixed shores and rocky and sandy shores in False Bay
… Sample quantitatively and describe macrofaunal communities on mixed shores in False Bay; (2) make direct comparisons among both the four types of habitats and three types of shores; and (3) test the hypothesis that sand inundation increases diversity at both habitat (a-diversity) and shore …
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Effects of edge and coarse woody debris on small mammal communities in riparian and upland habitats in northern West Virginia
The effects on biological communities of human-induced disturbances such as road construction for logging and military activities are a topic of much controversy in modern society. Furthermore, the response of small mammal communities to edge and coarse woody debris (CWD) volume in riparian and …
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Quantifying biotic interactions with inshore subtidal structures: comparisons between artificial and natural reefs
… purposely worldwide to influence physical and biological processes around coastlines and in inshore waters; often to augment recreational diving and fishing, support environmental mitigation and habitat restoration and, more recently, for scientific research. The aims of this project were to …
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The role of Marine Renewable Energy structures and biofouling communities in promoting self-sustaining populations of Non-Native Species
Novel environments and biological communities created by the large-scale deployment of Marine Renewable Energy Devices (MREDs) have the potential to promote the spread of non-native species (NNS). Knowledge of how community composition resident on MREDs is shaped by geography, local hydrodynamics …
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Applications of Sensory Analysis for Water Quality Assessment
In recent years, communities that source raw water from the Dan River experienced two severe and unprecedented outbreaks of unpleasant tastes and odors in their drinking water. During both TandO events strong 'earthy', 'musty' odors were reported, but the source was not identified. The first TandO …
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Exploring the relationship between crustal permeability and hydrothermal venting at mid-ocean ridges using numerical models
… in nutrients support a wide variety of unique biological communities. Thus, understanding hydrothermal processes at oceanic spreading centers is important to provide insight into thermal and biogeochemical processes. In this dissertation I present the results of numerical modeling efforts for …
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Ecological Benefits of Mitigation on a Large River Mainstem in an Intensively Mined Appalachian Watershed
… quality, sediment composition, bank stability, biological communities and organic matter processing in response to habitat enhancing structures; 2-relate changes in structural and functional attributes of the Little Coal River mainstem to losses resulting from mining impacts to headwater …
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MULTIDISCIPLINARY WORK TO DETERMINE HYDROLOGY OF ARID LAND SPRINGS AND HOW SPRING WATERS INFLUENCE WATER QUALITY AND ECOSYSTEM HEALTH FOR DESERT ENVIRONMENTS
… 3) low WQSC (stream areas that dry). Sampling of biological communities showed that biodiversity varies with and may be influenced by the WQSC. Hydrogeochemical analysis indicate that springs are from confined regional and local aquifers. Isotopologues (δ18O, δD, 3H) indicate that spring waters …
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Attraction and risk in urban bird habitats
… by vegetation and associated spontaneous, biological communities. Such urban habitats may provide valuable resources for birds and other wildlife; however, these sites often contain high densities of non-native plants and can be polluted, potentially imparting a greater risk than benefit to …
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