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 42 for “"vegetation surveys"”.
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Food habits of nutria (Myocastor coypus) at Spring Lake, Hays County, Texas
… nutria were collected during the year. Vegetation surveys were conducted at Spring Lake using the Daubenmire technique to estimate aquatic macrophyte cover. The availability of aquatic macrophytes at Spring Lake was compared with aquatic macrophyte use by nutria to determine if they fed …
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The effect of urbanization on the stopover ecology of neotropical migrant songbirds
I conducted spring migration point counts and vegetation surveys at 29 forest patches in the Chicago, IL metropolitan area in 2012 and 2013. The forest patch selection was designed to test the effects of patch size, distance from the Lake Michigan shoreline and degree of urbanization. I conducted …
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Vegetation change and vegetation type stability in the Cape of Good Hope Nature Reserve 1966 - 2010
Vegetation stability was investigated within the Cape of Good Hope Nature Reserve by incorporating three vegetation surveys spanning a 44 year time period. The goals of this study were to investigate changes in overall species diversity within the reserve, stability of community composition within …
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Beaver (Castor Canadensis) Impacts on Herbaceous and Woody Vegetation in Southeastern Georgia
… habitat (N=9) in a matched pairs design. Vegetation surveys were performed in spring and summer. Species richness was calculated for herbs, vines, woody seedlings, and woody vegetation. Richness of herbaceous vegetation was higher at distances closer to shore while richness of large woody …
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An ecosystem-based management approach for maintaining sandhill crane nesting habitat on northern Vancouver Island
… from April to October over a two-year period. Vegetation surveys and crane inventories were carried out in 2006 and 2007 to spatially map the structure and patterns of bog ecosystems used by migrating cranes. The highest-rated Sandhill Crane nesting habitat consisted of sedge and low shrub …
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Birds in Residential Metropolitan New Orleans Neighborhoods and Their Relationships to the Batture and Yard Vegetation
… canopy cover, stem counts, and understory vegetation. Surveys were conducted in the spring and summer of 2010. It was found that batture birds, urban birds, and pooled birds all had greater species richness and abundance in the spring in areas with more canopy cover, higher stem counts, …
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Nesting Ecology of Hawksbill Sea Turtles (Eretmochelys imbricata) on Utila, Honduras
… using satellite telemetry, beach profiling, vegetation surveys, beach monitoring, and nest temperature profiles. We affixed satellite transmitters to two nesting hawksbills, and found the turtles migrated to different countries. One turtle traveled 403 km to a bay in Mexico, and the other …
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Beach-dune interactions and a new cycle of foredune evolution, Gulf County, Florida
… and waves, and foredune heights. Topographic surveys, vegetation surveys, wave data, and archival research were all used to analyze the locations. The accumulated data were applied to the predominant models in an attempt to verify their applicability and accuracy. The results showed the …
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The Historic Fire Return Interval and the Ecological Effects of Fire Suppression on Montane Longleaf Pine Dominated Ecosystems in Northwestern Georgia.
… in forest composition was measured using modern vegetation surveys and historic “witness tree” vegetation data obtained from a georeferenced 1832 Georgia Land Lottery Survey map. The historic fire return interval was estimated using remnant longleaf stumps and dendrochronological techniques. …
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The Role of Native Diversity and Successional Processes on Communityinvasibility in Riparian Primary Forest
… that relationship change through succession? Vegetation surveys were conducted to quantify plant species richness on four raised terraces (understory reinitiation to multi-age old growth), six lower terraces (stem exclusion to understory reinitiation), and seven active channel margins, …
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Diversity patterns and conservation priorities in the "Mountains of Central Asia" biodiversity hotspot
… use and climate change as the main drivers of vegetation change, while highlighting the strong influence of orographic heterogeneity. The review also revealed that Kyrgyzstan’s croplands remain poorly studied, despite increasing evidence that they may serve as secondary habitats for rare plant …
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Botanical processes in urban derelict spaces
… in the West Midlands. Experimental work included vegetation surveys, soil seed bank investigation, field mapping and seed rain trapping methods. Interpretation of the data involved a range of approaches including vegetation classification and ordination, comparative analysis of plant functional …
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Restoration implications of land management on aboveground vegetation and seed bank composition of grassland communities in Illinois
… the similarities or dissimilarities of standing vegetation and seed bank composition for six different land management histories at Midewin National Tallgrass Prairie (IL, USA): restored prairie, remnant prairie, recently planted pasture, historic pasture, abandoned (seral) pasture, and crop …
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Evaluation of forest site potential in the Northwest Department of the Republic of Haiti
… of sites within the study area. Soil and vegetation surveys were used to verify, subdivide, and provide additional description of the life zones. Trial plantations were established in the various life zones to determine adaptability, quantify productivity, and monitor possible pathogenic …
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A Vascular Flora of the Sacatar Trail Wilderness, Sierra Nevada, California
… conditions to support a broad spectrum of vegetation assemblages. The Bureau of Land Management has prohibited vehicular activity in this area since its wilderness designation in 1994; consequently, recent human impact has been minimal. Grazing, however, is still permitted throughout most …
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Spruce bark beetle disturbance in the forest-tundra ecotones of southwest Yukon: impacts and predisposing factors
… vulnerable to insect disturbances. Using vegetation surveys and dendrochronological techniques, we examined factors that may have predisposed the forest-tundra ecotones of southwest Yukon to spruce bark beetle (Dendroctonus rufipennis) infestation, and investigated the subsequent effects …
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Natural Visions: Photography and ecological knowledge 1895-1939
… phytogeography, to the first modern ecological vegetation surveys undertaken by British ecologists around 1900, ecology developed as a visual science. From the late 1890s, early ecologists insisted on a role for photography in particular, as a means of scientific investigation and …
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Response of Breeding Birds to Forest Disturbance in the Arkansas Ozarks: Impacts of Uneven-Aged Management, Ice Damage, and Woodland Restoration
… and anthropogenic disturbance events can alter vegetational structure of forests, thereby influencing communities of breeding birds. The objectives of my study were to examine the response of breeding birds and their habitat to three types of forest disturbance: (1) uneven-aged management, (2) …
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Plant Assemblage Structure on Barrier Island ‘Pimple’ Dunes at the Virginia Coast Reserve Long-Term Ecological Research Site
… ridges. Accomplishing these goals entailed field vegetation surveys of a representative sample of pimple and dune plant assemblages and environmental monitoring. There were distinct assemblage types that segregated themselves by habitat type: marsh, shrub thicket, and dry summit. Shrub assemblages …
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