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 13 of 13 for “"paired plots"”.
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Vegetative Potential to Reduce Total Dissolved Solid Nutrient Ions Generated from Reclaimed Mine Lands in Central Appalachia
… is often highest. Vegetated and un-vegetated paired plots were established across eight sites with gradients in age, spoil material, and vegetative productivity. Ion exchange resin lysimeters were used to compare nutrient ion fluxes in soil solution that contribute to TDS between paired plots. …
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Biotic and Abiotic Factors of Picea rubens (Red Spruce) Seedling Regeneration in Disturbed Heathland Barrens of the Central Appalachians
… assessment of thirty-one demographics plots spread across two sites (north Cabin Mountain and Bear Rocks/Dolly Sods), and a more focused assessment of red spruce species associations within thirty-two paired plots at Cabin Mountain. At the 15m x 15m demographics plots, I conducted a …
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Winter habitat use by Blackburnian Warblers (Dendroica fusca) in Los Amarillos, Colombia
… Habitat variables were measured in circular plots centered where a Blackburnian Warbler was first seen. The same set of variables was measured in randomly located paired plots to compare the two sets. The results obtained in Colombia (wintering grounds) were compared to similar data available …
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The association and transmission of Leptographium procerum (Kendr.) wing., by root feeding insects in Christmas tree plantations
… weekly in baited pit-fall traps placed in: 1) paired plots placed in asymptomatic and symptomatic areas of PRD symptomatic plantations, 2) plots in plantations where PRD was absent, 3) plots in the headlands of plantations, 4) plots in forested areas and 5) one plot in an urban setting. Trees …
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Exotic Invasive Plants on Private Woodlands of Virginia: Effects on forest composition, structure, and wildlife habitat
… nested overstory, understory, and regeneration plots and wildlife point intercept transects using paired plots during the summers of 2006 and 2007. Species richness of the overstory and understory did differ, but native percent understory cover and sapling density remained unchanged. Tree …
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Silvicultural Methods for Improving Hardwood Management on Non-Industrial Private Forest land in Virginia
… between treatments. A case study examined paired plots throughout the state of Virginia where the crown touching crop tree release method was applied. In both the Piedmont and Ridge and Valley regions of the state an increase in dbh was observed. Finally, a timber stand improvement study …
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The effects of invasive slender false-brome (Brachypodium sylvaticum) on forest ecosystem function in western New York
… in Danby State Forest (DSF), Danby. Replicate paired plots with and without B. sylvaticum were selected in each forest; each pair was matched by canopy cover and canopy type. In plots I measured vegetation, soil physical and chemical characteristics, soil moisture, soil respiration, and …
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Effects of Cheatgrass Control on Wyoming Big Sagebrush in Southeastern Utah
… (caged) plants on sprayed and non-sprayed paired plots on 6 sites. Cheatgrass and other annual forb pretreatment cover was reduced from 23% to less than 3% the first year after the herbicide treatement and only increased to 4% the second year. Soil moisture on the treated plots was …
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Influence of fire and habitat on the removal of invasive plant seeds by granivores in longleaf pine savannas
… seasons prior, within which I established paired plots in upland plant communities, which included Pinus palustris, Aristida stricta, legumes, grasses, and composites (hereafter “upland habitat”), and upland-wetland ecotone communities, which included P. palustris, Acer rubrum, Liriodendron …
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Chinese Tallow Long-Term Impact on Stand Dynamics in a Bottomland Hardwood Forest Following Vegetation Management
… been conducted. A 10-year re-measurement of 22 paired plots installed in 2012 on the Pineywoods Mitigation Bank near Diboll, Texas following herbicide treatments examined Chinese tallow and native tree stand structure. Each native and Chinese tallow plot included three sets of nested subplots. …
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Long-term impacts of livestock grazing in the Succulent Karoo: A 20-year study of vegetation change under different grazing regimes in Namaqualand
… South Africa. Forty pairs of permanently marked plots, separated by a fence (with communal grazing land on one side and commercial rangelands on the other) were established in 1996 to study the long term impacts of livestock grazing. Vegetation structure and composition of the plots were analysed …
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The influence of Microhodotermes viator nest density and dispersion on ecological processes
… 2 - The spatial properties and productivity of plots with high and low-densities of M. viator mounds were compared, and the relationships between their spatial properties and productivity values, as a function of density, investigated. Using Google Earth images paired plots of high and low …
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Conserving living landscapes: investigating the impacts of livestock grazing and assessing rangeland restoration potential in Overberg Renosterveld, South Africa
… diversity was assessed using Modified Whittaker plots and presented in Chapter 3. It was hypothesised that livestock grazing by cattle would have less effect on species richness and diversity and growth form diversity than sheep grazing and that both cattle and sheep grazing would lead to a …