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 14 of 14 for “"unique habitat"”.
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Environmental governance of sand mining in an urban setting : Macassar Dunes, Cape Town, South Africa
… as a core flora conservation site due to its unique habitat diversity and quality. South Africa is a developing country and this case study is used to highlight the tensions that arise between the need to provide building sand for development and the need for integrated and accountable …
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Vegetation and Soil Patterns at a Mountain Wetland Ecotone
… of four open bog meadows, which provide unique habitat to several rare and endangered plant species. However, these meadows are filling in with trees and alder. This research is a study on the factors that may be involved in the processes and patterns influencing tree encroachment into …
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Predator Behavior and Prey Demography in Patchy Habitats
Habitat loss and fragmentation are among the greatest threats to biodiversity, and these threats can be exacerbated or alleviated by the presence of interacting species. The effect of habitat loss and fragmentation on predator-prey systems has received extensive theoretical attention, but empirical …
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Activities Within a Myotine Bat Community With Emphasis on the Endangered Indiana Bat, Myotis Sodalis
… A nested sampling design was used with five habitat types which include upland and lowland sites within each habitat. Calls were identified to species using a linear discriminate function analysis and a library of known calls. The three species of Myotis each showed unique habitat preferences …
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Population genetics of wood frogs (Lithobates sylvaticus) in a forested ridge-top wetland ecosystem
… impact biodiversity. Ridge-top wetlands are unique habitat for pond-breeding amphibians and the Daniel Boone National Forest (DBNF) contains natural forested ridge-top wetlands in close proximity to constructed wetlands intermixed across the same landscape. Genetic data can be used to address …
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Distribution of non-native wetland plants is facilitated by urbanization and roads in the Chicago region
… them susceptible to invasion; including reduced habitat area, loss of unique habitat types, and increased nutrient run-off. Roads facilitate the spread of non-native plant species by providing locally disturbed habitat and a corridor for propagule dispersal. I conducted two analyses to assess how …
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Evaluating Ecological Influences of Altered Flow Regimes Using Two- and Three-Dimensional Hydrodynamic Models
… such as boulders and large woody debris provide unique habitat for many aquatic organisms. Numerical modeling of the flow structures surrounding these obstructions is challenging, yet it represents an important tool for aquatic habitat assessment. Moreover, efforts for modeling the …
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Function and diversity of the Ship, Trinity, and Tiger Shoal Complex, with emphasis on macrofauna and spawning blue crabs (Callinectes sapidus)
… which comprises changing and discrete benthic habitats including high relief sandy shoals, and muddier, mostly deeper off-shoal areas, prone to hypoxia. Benthic macrofaunal assemblages of shoals included endemic species, and shoal communities were significantly different from each other and the …
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Modeling Intermittent and Perennial Headwater Stream Origins In North Carolina.
… and perennial headwater streams each provide unique habitat. Until recently, it has not been possible to accurately delineate these streams or predict channel flow durations without fieldwork. Recent advances in remote sensing may allow more accurate headwater stream mapping.</p> <p>Methods …
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The evolution of freeze tolerance in a historically tropical snail
… terrestrial environments intersect to create a unique habitat, across which physiological tolerance strongly influences range. The snail Melampus bidentatus occurs in coastal salt marshes in the western Atlantic and Gulf of Mexico. I have used sequence data from one mitochondrial (CO1) and two …
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Acute Toxicity and Sub-Lethal Effects of Non-Point Source Pollutants on Invertebrates
… understanding of the current health of this unique habitat. Of the four compounds tested, only the industrial solvent, styrene, resulted in an LC50 (1341 µg L-1, I. obsoleta) that was within the range of currently reported environmental levels. Diuron and CuPT did not elicit mortality at …
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The growth and productivity of ribes nigrum under various levels of shade and the implications for multifunctional woody polycultures
… major interest in black currants stems from the unique taste and the perceived health benefits. Black currant berries contain a vast array of mineral nutrients that are much higher than many of the major fruits and berries currently in production, with a vitamin C content over three times as high …
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The selection process of analogue parameters and criteria for rehabilitation design at Sishen mine
… vegetation types and surrounded by six distinct habitat types. This study evaluates 30 sites in the vicinity of the mine regarding ecology using landscape function analysis; regarding substrate by comparisons of soil parent material, slope, structure and chemical characteristics; vegetatively by …
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An investigation of optical methods for the mapping of microgradients of hydrogen-ion concentration within dental biofilms
… tracts and, as such is exposed to unique environmental constraints. The human mouth is home to a myriad of microorganisms, many of which are exclusively found in this unique habitat. These microbial inhabitants can establish themselves and thrive in this environment by attaching to …