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Showing 1 to 20 of 38 for “"Southern Appalachian Mountains"”.
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Genetic variation in eastern white pine from the Southern Appalachian Mountains
Thesis (M.S.)--Michigan State University. Dept. of Forestry,
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Denitrification in sediments of headwater streams in the southern Appalachian Mountains, USA
… denitrification in sediments of streams in the southern Appalachian Mountains, USA. Stream water and sediments were sampled seasonally in two streams of contrasting nitrate availability, Noland Creek (high NO₃-N) and Walker Branch (low NO3-N). Eight additional streams with varying nitrate levels …
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Effects of Disturbance History on Forest Soil Characteristics in the Southern Appalachian Mountains
Minimally disturbed virgin forest soils in the Little Santeetlah Creek (LSC) watershed of western North Carolina were sampled along with soils from the adjacent disturbed Slickrock Creek (SRC) watershed. Soils with similar elevation/landform/vegetation/parent material characteristics were initially …
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WATER SOURCES AND ECOPHYSIOLOGY OF SELECTED RIPARIAN SPECIES OF THE SOUTHERN APPALACHIAN MOUNTAINS, USA
… riparian species along a perennial river in the southern Appalachian foothills, USA (Chapter II), including water source patterns over an entire year (III), and how these patterns changed according to differing hydrologic regimes (VI). Additionally, these source usage patterns were examined for …
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Effects of riparian buffer width on stream salamander populations in the southern Appalachian Mountains
Salamanders in the Appalachian region have been extensively studied, but the majority of research assessing the impacts of logging has focused on terrestrial species that are not dependent on stream habitats for egg deposition or larval development. I have collected data on both larval and adult …
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An analysis of solute transport on a harvested hillslope in the southern Appalachian Mountains
… studied in the steeply sloping terrain of the southern Appalachian Mountains. I examined solute transport in a first-order watershed in the Nantahala National Forest in North Carolina that was harvested in February 2006 with retention of a 10-m riparian buffer. To quantify the movement of …
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Influence of elevation on tree species distribution and growth in the southern Appalachian Mountains
The southern Appalachian Mountains have long been an area of interest for the analysis of forest species growth and composition. Past forest vegetation studies focus on species composition and structure for relatively local scale research areas. Species distribution within this geographic area was …
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Evolution of transient topography on passive margins: A study of landscape disequilibrium in the southern Appalachian Mountains
The mechanism through which the Appalachian Mountains have maintained moderate relief some ~300 Myr after the cessation of mountain building has long puzzled geomorphologists. As recent studies have shown that Appalachian exhumation has occurred at slow rates consistent with isostatic rebound of …
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Forest Composition, Regeneration, and Tree Quality in the Southern Appalachian Mountains of Virginia: Selective Cutting vs. Shelterwood
… to mesophication of oak-dominated forests in the southern Appalachian Mountains; however, SC resulted in a higher percentage of mesic species post-harvest, and the SW tended to have more oak regeneration.
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Interactive effects of hemlock mortality and nitrogen availability on nutrient pools and fluxes in the southern Appalachian Mountains
The impacts of exotic insects and pathogens on forest ecosystems are increasingly recognized, yet the factors influencing the magnitude of effects remain poorly understood. Eastern hemlock (Tsuga canadensis) exerts strong control on nitrogen (N) dynamics, and its loss due to infestation by the …
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The Form and Function of Headwater Streams Based on Field and Modeling Investigations in the southern Appalachian Mountains
… Valley and Ridge and Blue Ridge provinces in the southern Appalachian Mountains. I surveyed nine headwater (0.33 - 2 km2 drainage area) streams in a variety of bedrock, climate, base level, and land use conditions and produced a high-resolution dataset on their longitudinal and cross sectional …
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Crop tree release impacts both the understory and overstory in mixed oak stands of the southern Appalachian Mountains
… regarding the understory response to CTR in the Appalachian Mountains of southwest Virginia. An increase in understory species composition and abundance is expected, as CTR increases the availability of light and nutrients to the understory. Increased understory growth and abundance can improve …
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Terrain and Landcover Effects of the Southern Appalachian Mountains on the Low-Level Rotational Wind Fields of Supercell Thunderstorms
That tornadoes cannot occur in mountains due to disruptive influences of the complex terrain is a common misperception. Multiple tornadoes occur each year in mountainous environments, including the Appalachian Mountains. Copious research examines the influences of complex terrain on large severe …
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Historical refuges and recolonization routes in the Southern Appalachian Mountains, inferred through phylogeographic analysis of the spotted wintergreen (Chimaphila maculata)
… examined the population history of biota in the Southern Appalachian Mountains and how they responded to climate change associated with the end of the Last Glacial Maximum (~18,000 years ago), though few studies have focused on understory plants. This study redressed that knowledge gap thorough …
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The influence of water and light on the physiology and spatial distributions of three shrubs in the Southern Appalachian Mountains
In order to understand vegetational gradients which develop in response to environmental gradients, the physiological capabilities of each species must be examined in relation to the observed environmental gradient. The distributions of three temperate zone shrub species which occupy different …
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Impacts of oak-focused silvicultural treatments on the regeneration layer nine years post-treatment in the southern Appalachian Mountains of North Carolina
… in response to silvicultural treatments in the southern Appalachian Mountains of North Carolina. The treatments were: a shelterwood treatment (25-30% basal area reduction through mid-story removal with herbicides), a prescribed fire treatment (two late dormant season fires occurred over a 9-year …
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The Importance of Fog for Carbon Gain, Water Balance, and Foliar Uptake in Southern Appalachian Cloud Forests
… and the relic spruce-fir communities of the southern Appalachian Mountains, USA. In these climates cloud immersion can provide an important subsidy of moisture that can improve plant water relations as well as photosynthetic status through alleviation of high sunlight and temperature stress. …
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A Dendrochemical Analysis of Lead, Aluminum, and Calcium in Southern Appalachian American Beech.
… health of the northern hardwood forest in the Southern Appalachian Mountains of Tennessee, North Carolina, and Virginia has recently gained attention from the media and environmental stakeholders. This project was designed to examine concentrations of metals, including lead, aluminum, and …
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Vegetation Responses to Seven Silvicultural Treatments in the Southern Appalachians One-Year After Harvesting
… harvesting were examined on seven sites in the southern Appalachian mountains of Virginia and West Virginia. Treatments included: 1) control, 2) understory control by herbicide, 3) group selection, 4) high-leave shelterwood, 5) low-leave shelterwood, 6) leave tree, and 7) clearcut. The effects …
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The photoprotective role of thermonastic leaf movements in Rhododendron maximum: potential implications to early spring carbon gain
… L. is a dominant subcanopy species in the southern Appalachian Mountains. R. maximum undergo distinct thermonastic leaf movements (TLM). The purpose of these movements has not yet been determined. Previous studies have suggested TLM are a photoprotective mechanism for the dynamic light …
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