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 70 for “"vegetation communities"”.
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Response of avian, arthropod, and vegetation communities to mid-contract management in Conservation Reserve Program tall fescue monocultures
… (MCM) to restore early successional plant communities in aging Conservation Reserve Program (CRP) fields. I evaluated the effects of 3 MCM regimes, including fall strip disking, fall herbicide spraying (hereafter, spray), and fall herbicide spraying in combination with spring legume …
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A study of the impacts of fragmentation on the North Kent grazing marshes landscape characteristics, features and vegetation communities
… been fully defined, either interms of their vegetation communities or their landscape characteristics. This study sought to define coastal grazing marshes in terms of the landscape characteristics and features, and to identify the range of vegetation communities, which are typical of the …
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Use of carbon isotope and C/N geochemistry in reconstructing vegetation communities: a mid- to late- Holocene palaeoenvironmental investigation from Romney Marsh, Kent, UK
… isotope and C/N ratios of past and present vegetation communities, particularly alder carr and saltmarsh. Romney Marsh is a large, extensively studied reclaimed coastal wetland in south east England containing a 2-metre thick peat layer that formed between c. 5500-1500 cal. yrs. BP. The …
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The spatial distribution of total and available heavy metals at areas of historic mining activity in the Peak District and their influence on local vegetation communities
… variables in relation to the distribution of vegetation species at seven areas of historical mining activity in the Southern Peak District. This study is important as many of these sites have been designated protected areas due to their historical, archaeological, geological or ecological …
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Ground-based hyperspectral and spectro-directional reflectance characterization of Arctic tundra vegetation communities : field spectroscopy and field spectro-goniometry of Siberian and Alaskan tundra in preparation of the EnMAP satellite mission
… characterization of important Arctic tundra vegetation communities at representative Siberian and Alaskan tundra sites as basis for the extraction of vegetation parameters, and the normalization of BRDF effects in off-nadir and multi-temporal remote sensing data. Moreover, in preparation for …
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Effects of Landscape Age and Salinity on Plant Community Composition and Productivity in Opportunistic and Constructed Wetlands in the Athabasca Oil Sands Region, Alberta
… to determine how salinity and age influence the vegetation community composition, and the biomass of six dominant wetland plant species (Carex aquatilis, Calamagrostis canadensis, Carex atherodes, Carex utriculata, Schoenoplectus tabernaemontani, and Typha latifolia) found on reclaimed and …
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The natural vegetation of the Robertson Karoo : an evaluation of its conservation status
The natural vegetation of the Robertson Karoo contains many taxa and vegetation communities worthy of conservation. This thesis is concerned with aiding the future conservation of natural vegetation of the Robertson Karoo by assessing the threats to its survival and identifying priority …
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LONG-TERM OVERSTORY VEGETATION RESPONSES TO PRESCRIBED FIRE MANAGEMENT FOR LONGLEAF PINE AT BIG THICKET NATIONAL PRESERVE
… to species abundance data to examine changes in vegetation communities from a variety of prescribed fire treatments and controls. The vegetation data was separated by size class to include overstory, small tree, sapling, and seedling data. Across the size classes and treatments, the sandhill and …
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Linking ecosystem services with state-and-transition models to evaluate rangeland management decisions
… needs to consider the impacts of long-term vegetation transition. It needs a conceptual framework defining potential vegetation communities, describing the management induced transition of one vegetation community to another, and documenting the expected benefits provided by the various …
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Late quaternary vegetation history and palaeoenvironments of the Cederberg Mountains, South Africa : evidence from hyrax (Procavia capensis) middens
… analysis to the midden material, local plant communities were inferred and a palaeoenvironmental reconstruction of prevailing conditions over the period of accumulation was produced. An assessment of the overall pollen assemblages indicates that typical mountain fynbos were present at De Rif …
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Hydrologic Variations Within Created and Natural Wetlands in Southeastern Virginia
… for successful reestablishment of target vegetation communities. During 2002–2004, the Virginia Department of Transportation constructed large mitigation wetlands on two different Quaternary aged surfaces with very similar hydrogeomorphic conditions. The Sandy Bottom Nature Park site …
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Advancing Vegetation Monitoring Strategies in Arid Ecosystems Using Unmanned Aircraft Systems
… monitoring using remotely sensed data because vegetation communities in drylands are often sparsely distributed and have heterogeneous species and soil composition. Unmanned Aircraft Systems (UAS) offer centimeter-scale spatial resolution and flexible deployment that can better address the …
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Assessing Wetland Restoration on the Delmarva Peninsula using Vegetation Characteristics
… and Delaware were surveyed for above-ground vegetation and seed bank community composition, annual biomass production, and vegetation carbon content (10 restorations from prior-converted cropland (aged 5-31 years), and 5 natural forested depressions). Within each wetland, hydrologic zones …
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Remediation and restoration of ocean exposed cliff-top, in the context of Dounreay (Scotland) nuclear power plant decommissioning
… is to restore cliff-top habitat with native vegetation, blending in with its surroundings and necessitating minimal maintenance. The overall objective of this PhD research was to help develop a plan for the restoration of the site. A key challenge in this particular case was the residual low …
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AN INVESTIGATION OF HYDROGEOLOGIC, STRATIGRAPHIC, AND STRUCTURAL CONTROLS ON ACER GRANDIDENTATUM COMMUNITIES IN A KARST LANDSCAPE, OWL MOUNTAIN PROVINCE, FORT HOOD MILITARY INSTALLATION, TEXAS
… with military training, maintaining much of the vegetation in early succession. This study investigates thelithologic, stratigraphic, and structural controls on the hydrologic, hydrogeologic, and geomorphologic evolution of the Owl Mountain Province as expressed by mesic vegetation communities, …
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Assessing vegetation reestablishment on disturbed high mountain lakeshores following historic dam removal in Rocky Mountain National Park, Colorado, USA
… of scoured shoreline, completely denuded of vegetation by approximately 80 years of inundation. The disturbed lakeshore areas were left to undergo passive restoration. In the years immediately following dam removal, one short-term (3 year) revegetation study was conducted at Lawn Lake, and …
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Vegetation colonization within exposed reservoirs following dam removal on the Elwha River, Washington
… large dam removals to date, so studies assessing vegetation succession on exposed reservoir sediments are limited. My research aims to assess how environmental factors within exposed reservoirs affect vegetation succession following removal of two dams on the Elwha River, Washington. In addition, …
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A Statistical Examination of the Climatic Human Expert System, The Sunset Garden Zones for California
… climatic parameters to match the larger world vegetation communities. The second developed complex formulas of "Moisture Factors" that provided efficient understanding of how evapotranspiration influences plant growth and health, both for native and non-native communities. In the latter half of …
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Effects of Disturbance History on Forest Soil Characteristics in the Southern Appalachian Mountains
… watershed. Soils with similar elevation/landform/vegetation/parent material characteristics were initially sampled at nine random locations each on north and south aspects within each watershed with a soil push probe. Some differences in parent materials were noted on south aspects (metasandstone …
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