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 140 for “"vegetation types"”.
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Carbon and nitrogen cycling in watersheds of contrasting vegetation types in the Fernow Experimental Forest, West Virginia
… N sequestration of conifer and hardwood forest types by examining the mechanisms controlling N cycling and NO3-N production in two watersheds with contrasting vegetation at the Fernow Experimental Forest (FEF), West Virginia. I utilized watershed C and N budgets to account for differences in …
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Chemical composition and toxicity of emissions from burning five vegetation types of Western Australia under experimental combustion conditions
… (PM2.5 and PM10) from laboratory-based fires of vegetation from five typical vegetation types of Western Australia. Species burnt were three grasslands (Spinifex represented by Triodia basedowii, Kimberley grass represented by Sehima nervosum and Heteropogon contortus, and an invasive grass …
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Evaluating the influence white-tailed deer have on wetland vegetation types with respect to wetland birds at Shiawassee National Wildlife Refuge, Saginaw, Michigan
… is a knowledge gap on how deer use of wetland vegetation types may affect bird use of those same wetlands. Our objectives were to 1) evaluate white-tailed deer habitat suitability within a landscape dominated by wetlands, 2) quantify and compare use of wetland vegetation types by white-tailed …
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The impacts of indigenous herbivore grazing over five years (2004 - 2008) on vegetation dynamics in four distinct vegetation types of the winter-rainfall Little Karoo
Vegetation in semi-arid regions is subject to change when heavily utilised by herbivores. Changes in species richness, species and growth form composition, total cover and plant palatability in response to rest (fenced) and grazing (open) treatments was investigated in Sanbona Wildlife Reserve over …
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Alien plant invasion on the Agulhas Plain : a detailed description of invasion patterns
… to which invasive alien species affect natural vegetation. It is important to classify such species based on abundance and distribution in order to determine invasion patterns and set priorities for management within a region. Such a study was adapted for the Agulhas Plain of South Africa in the …
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Estimates of above-ground phytomass and nutrients in the understory vegetation in an Appalachian oak forest in Virginia
… nutrients (N, P, K, Mg and Ca) in four different vegetation types in an Appalachian oak forest in southwestern Virginia. The study area is located at midslope on the southeast aspect of Potts Mountain in four non-contiguous compartments which are to be clearcut and whole-tree harvested in the near …
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What environmental variables limit Typha expansion in Cape Flats wetlands?
… were examined. Wetlands were classified into types depending on their dominance of T. capensis, with Typha dominant, Mixed and No Typha wetland types. In each wetland soil cores were taken to represent the main vegetation types, focusing on T. capensis, Ficinia nodosa and Isolepis rubicunda. …
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Activity patterns of baboons (Papio ursinus) at Cape Point
… expected from the spatial distribution of these vegetation types in the home-range. Frequency of baboon occupation for each of five vegetation types varied seasonally, and appeared to be a reflection of the availability of plant food.
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Fire and Fuels: Vegetation Change Over Time in the Zuni Mountains, New Mexico
… of fire in the Zuni Mountains based on change in vegetation types that are most prone to fire</em>. Using Landsat imagery and historical fire spread data from 2001 to 2014, the following research questions were investigated: (1) <em>What variables are responsible for fire spread in the Zuni …
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Soil Respiration and Related Abiotic and Remotely Sensed Variables in Different Overstories and Understories in a High Elevation Southern Appalachian Forest
… of Rs under a natural hardwood system. The four vegetation types under consideration were an eastern hemlock (Tsuga canadensis L. Carriere) dominated overstory, a hardwood overstory with little to no understory, a mountain laurel (Kalmia latifolia L.) dominated understory, and a cinnamon fern …
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Soil Microbial Community Distributions And Disease Suppressiveness In The Coastal Plain Of Georgia
… compared the soil microbial communities of three vegetation types in the coastal plain of Georgia: 1. crop land actively in use for agricultural production, 2. transitional grassland in early stages of secondary succession, and 3. pristine unmanaged forest land. Microbial species diversity and …
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Micro scale heterogeneity of spiders (Arachnida: Araneae) in the Soutpanberg, South Africa: a comparative survey and iventory in representative habitats
… assemblages, comparing five representative vegetation types in the western Soutpansberg, Limpopo Province, South Africa. We assess these vegetation type in terms of their family and species composition, as well as levels of endemicity, relating these differences with vegetation structure. …
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Granivory and Granivores in Native Grasslands and Agropyron Cristatum Stands in the Northern Great Plains
… stands. I examined temporal variation in vegetation factors that influence granivory rates. Finally, I determined the relationship between seed size and vertebrate granivore preferences in herbaceous and woody communities, and I sampled ants to determine species composition and how …
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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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Habitat use and activity patterns of Gopher Tortoises (Gopherus polyphemus) inhabiting military test ranges and forested sandhills at Eglin Air Force Base, Florida
… densities among sites. In Chapter 1, I compared vegetation structure, composition, and burrow site selection among sites and between forested and test range vegetation types. I also attempted to identify relationships between vegetation characteristics and variation in burrow densities (a proxy …
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Vegetation studies in the Humansdorp region of the Fynbos Biome
… distribution in Cape shrublands and non-Cape vegetation types (subtropical thicket, Afromontane forest) in the Humansdorp region of the Fynbos Biome. The first paper is a re-evaluation of vegetation concepts in the study area and, more generally, in the Fynbos Biome and adjacent biomes. …
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Evaluating impacts of hydroclimatic extremes on water use efficiency and carbon use efficiency of northern ecosystems
… Carbon use Ecosystem (CUE) across five distinct vegetation types in northern latitudes (deciduous broadleaf forests, evergreen needleleaf forests, grasslands, open shrublands, and permanent wetlands) from 2001 to 2020. Using flux data from FLUXNET2015 and AMERIFLUX with monthly SPEI for drought …
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Fynbos connectivity as a function of dispersal distance and the implications for bird conservation in the greater Cape Town area
… This study looks at the connectivity of two types of fynbos: Highland fynbos (Thicket, Bushland, Bushclumps and High fynbos) which makes up 22.7%, and Lowland fynbos (Shrubland and Low Fynbos) which makes up 28% of the studied extent. These vegetation types are outlined by the National Land …
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