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 72 for “"Woody vegetation"”.
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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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Woody vegetation change in response to browsing in Ithala Game Reserve, South Africa
… the impacts of elephants and other browsers on vegetation in large, open areas, less is known of their effects in restricted areas. The woody vegetation in Ithala Game Reserve, a fenced conservation area of almost 30 000 ha, was monitored annually from 1992 to 2000 to assess the impact of …
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Elephant impacts on woody vegetation around artificial waterholes in Zambezi National Park, Zimbabwe
… for their ability to substantially alter vegetation. However, as they need to drink regularly, surface water exerts a strong influence over the distribution and magnitude of elephant impacts on vegetation. This study was conducted in Zambezi National Park, a 560 km2 unfenced protected area …
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Shade, Moisture, and Woody Vegetation in Stormwater Management Basins: Influence on Cattail (Typha spp.) Growth
… water table, soil organic matter, etc.) and vegetation composition (cattail and other herbaceous biomass, and woody vegetation influence index) were collected from 100, 0.25-m2 plots. Principal component analysis indicated cattails and trees occupy opposing environmental spaces. Water table …
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Impact of tobacco growing and curing on indigenous woody vegetation : The case of Choma district, Zambia
… legal requirement for the growers to replace the woody vegetation that is consumed.The study therefore, was an assessment of the impact of tobacco growing and curing on indigenous woody vegetation in Choma district, Zambia. The impact was ascertained by examining the size of tobacco fields and the …
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Impact of tobacco growing and curing on indigenous woody vegetation : The case of Choma district, Zambia
… legal requirement for the growers to replace the woody vegetation that is consumed.The study therefore, was an assessment of the impact of tobacco growing and curing on indigenous woody vegetation in Choma district, Zambia. The impact was ascertained by examining the size of tobacco fields and the …
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Influence of Woody Vegetation Composition and Structure on Fuels and Prescribed Fire in Mountain Longleaf Restoration
… in northwest Georgia. I hypothesized that woody vegetation composition and structure indirectly influence fire behavior through fuel bed traits. Relative decreases in basal area and increases in the relative importance of pine and pyrophytic hardwoods (e.g., <em>Quercus</em> spp.) were …
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How has woody vegetation changed in north-east Namibia in response to land use, climate and fire?
Bush encroachment or the thickening of woody vegetation is a phenomenon occurring throughout savannas, which tends to be more pronounced in small protected areas. The consequences of bush encroachment are often negative for the conservation of biodiversity, for the promotion of tourism and the …
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A study of isotopic composition of xylem water of woody vegetation and groundwater along a precipitation gradient in Namibia
An understanding of the water used by vegetation in water limited environment is critical to fully understand water relations of natural areas with vegetation. Such information can be integrated in water management plans to estimate the influence of groundwater abstraction on the vegetation. Trees …
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Establishment of permanent plots and analysis of woody vegetation in the Tennessee River Gorge, Marion and Hamilton Counties, Tennessee
… Natural Heritage Program (TNHP) described 21 vegetation communities within the TRG. Permanent vegetation plots for the long-term study of 13 of these communities were established in summer 2009 in order to fulfill three goals. The first goal was to provide baseline data for long-term …
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The feasibility of using remote sensing and field-based checks to monitor the impact caused by collection of wood in the Eastern Cape/Ciskei forest and thicket formations
… utilisation imposes severe threats on woody vegetation communities. The Eastern Cape/Ciskei region is an area where energy supply problems are particularly severe and impacts on woody vegetation correspondingly severe. This study aimed to investigate the feasibility of using remote …
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Chemical Signaling and Resource Use by African Elephants (Loxodonta Africana)
… elephants, and 3) the impact of elephants on the woody vegetation at a privately owned protected area, Ndarakwai Ranch, Tanzania. Diurnal scans for elephants were conducted hourly from October 2004- April 2006. Focal animal observations were made from June- October 2005. Elephant damage to woody …
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Vegetation Survey of the Yegua Knobbs Preserve, Bastrop and Lee Counties, Texas
… present at the preserve for a growing season. Woody vegetation was sampled using the line intercept method, and herbaceous components were sampled using the quadrat method. Analysis of the qualitative and quantitative data led to the recognition of six plant communities at YKP, four dominated …
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An assessment of land degradation and alien plants invasion in the Waterberg Biosphere Reserve, Limpopo Province
… into the following classes: water bodies, woody vegetation, grasslands, cultivated fields, bare lands, and settlements. Change detection performed between the years showed that the area outside the WBR has been losing grasslands and woody vegetation and gained more bare lands, cultivated …
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Modern Pollen Spectra in Pond Sediments in Southwest Missouri and Its Relationship to the Contiguous Forests
… pollen spectra in small pond sediments and the woody vegetation which surrounds it.
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Impact of Weed Control and Fertilization on Growth of Eastern White, Loblolly, Shortleaf, and Virginia Pine Plantations in the Virginia Piedmont
… to intensive silvicultural practices such as woody competition control and fertilization in the Piedmont Province of Virginia is unclear. To address this issue, during 1999, a mixed stand of Virginia pine and hardwoods was clearcut and site-prepared by herbicide application. Three replications …
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Reproductive ecology of the island scrub-jay (Aphelocoma insularis)
… nest predation from the ongoing regeneration of woody vegetation and understory structure following the removal of exotic herbivores on Santa Cruz Island.
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Assessing the costs and benefits of native plant species for electric transmission line right-of-way revegetation within the Tennessee Valley Authority power service area
… lines necessitates the suppression of tall, woody vegetation on associated rights-of-way (ROWs). Native warm season grasses (NWSG) are more expensive for ROW revegetation compared to typical exotic cool season grasses (ECSG), but they may alter the successional trajectory such that long-term …
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