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Showing 1 to 20 of 47 for “"stand structure"”.
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Wildlife Response to Stand Structure of Green Ash Woodlands
… Dakota. Woodlands referred to as closed canopy stands consisted of dense stands of various species of trees and shrubs in different size and age classes. Woodlands referred to as open canopy stands had sparse stands of older trees, with intermediate seedling, sapling and tall shrub layers nearly …
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Stand structure, growth, and mortality in southern Appalachian spruce-fir
Current stand structure and composition, biomass levels and distributions, stand level foliage surface area (LAI) estimations, and mortality and growth patterns were determined using consistent sampling methodology for a network of 142 (20 m x 20 m) permanent plots at three southern Appalachian …
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Modeling forest stand structure using geostatistics, geographic information systems, and remote sensing
… the mean value within the area. Forest stand structure is traditionally mapped as polygons. This approach assumes that forest parameters are homogeneous within each polygon and change abruptly at boundaries. Many natural phenomena, however, change gradually over space. Spatial …
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Stand structure development effects on wood quality of Melina (Gmelina arborea roxb.)
A stem analysis was perform to examines the effects of thinning treatments on Melina (Gmelina arborea) wood quality and tree architecture in the North Coast of Colombia. 27 plots under forest management regimes and age classes were evaluated. Split-plot experimental design, stepwise regression and …
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Changes in stand structure and species diversity following clearcutting in central Appalachian hardwoods
… changes in species composition, diversity, and stand structural characteristics following clearcutting of a second-growth hardwood forest. To evaluate the temporal changes in importance of central Appalachian hardwood tree species, thirteen clearcuts on good excellent sites in West Virginia were …
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Effects of Wildfire Intensity on Invasives, Stand Structure and Fuel Loading in Shenandoah National Park
As invasive species are so prominent, the influence of wildfire intensity on fuel loading, invasives, species richness, diversity, and evenness were studied at Shenandoah National Park. Most National Parks identify invasive species as the biggest threat to their goal of maintaining native …
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Assessing the effects of field plot size and stand structure on forest inventory estimates derived from laser altimetry data
… Models were fitted for maximum and mean heights, stand basal area, stem density, and quadratic mean diameter. A validation routine was performed using an independent dataset and models derived from different plot sizes were assessed using goodness of fit, validation root mean squared error (RMSE), …
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Assessing the effects of field plot size and stand structure on forest inventory estimates derived from laser altimetry data
… Models were fitted for maximum and mean heights, stand basal area, stem density, and quadratic mean diameter. A validation routine was performed using an independent dataset and models derived from different plot sizes were assessed using goodness of fit, validation root mean squared error (RMSE), …
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Measures of stand structure and its relationship to site in the south-central Ridge and Valley Province of Virginia
… in Craig County, Virginia to assess vegetation structure and its relationship to differences in site. A number of structural parameters were measured by height strata to determine vertical stratification patterns. Foliage density was used in subordinate strata (< 5.0 m) as a comparative measure …
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Heterogeneity of Stand Structure, Fuels, and Wildfire Hazard in Dry and Moist Old-Growth Ponderosa Pine Forests: Case Studies from Western Montana
… wildfire hazards in old-growth ponderosa pine stands throughout the western United States. However, stand heterogeneity has been inadequately addressed in restoration and fuel treatment planning. In response, we analyzed two old-growth ponderosa pine forest restoration projects in western …
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Heterogeneity of Stand Structure, Fuels, and Wildfire Hazard in Dry and Moist Old-Growth Ponderosa Pine Forests: Case Studies from Western Montana
… wildfire hazards in old-growth ponderosa pine stands throughout the western United States. However, stand heterogeneity has been inadequately addressed in restoration and fuel treatment planning. In response, we analyzed two old-growth ponderosa pine forest restoration projects in western …
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Assessing the Impacts of Balsam Woolly Adelgid (Adelges Piceae Ratz.) and Anthropogenic Disturbance on the Stand Structure and Mortality of Fraser Fir (Abies Fraseri (Pursh) Poir.) in the Black Mountains, North Carolina
… for this research were to 1) use current stand structure to infer whether Fraser fir trees are experiencing a cycle of regeneration-mortality that will lead to eventual decline of the population, 2) determine what role, if any, the site-specific geographic variables of slope, elevation, …
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Stand Strucuture of Planted Stands in Storm-Water Retention Basins
… sources of water removal, and determining stand structure and leaf area of forests can be a measure of their effectiveness. The structure of forest stands on these basins managed for runoff mitigation has received little attention. We investigated the structure and species …
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Prescribing optimal harvests in forests containing even-aged and uneven-aged stands
… forest management has focused on single-stand problems to derive optimal harvest sequences in terms of residual basal area or residual stand structure for uneven-aged stands, and timing of pre-defined thinning treatments and clearcut harvests for even-aged stands. Recent research results …
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Restoration of Red Spruce (Picea rubens) and Virginia Northern Flying Squirrel (Glaucomys sabrinus fuscus) Habitat in West Virginia
… data and a spatial raster concerning forest stand structure variables. My results indicate that VNFS presence is associated with mature forest conditions across all spruce composition classes. Meanwhile, a long-term silvicultural restoration study assessed red spruce's growth responses to …
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Tree-ring analyses of European oak: implementation and relevance in (pre-)historical research in Flanders.
… Past forest management interventions and forest stand structure development are recorded in the growth patterns and the wood anatomical structure of archaeological and subfossil wood. By comparing them with growth patterns of contemporary trees from stands with well-known stand structure and …
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Tree-ring analyses of European oak: implementation and relevance in (pre-)historical research in Flanders
… Past forest management interventions and forest stand structure development are recorded in the growth patterns and the wood anatomical structure of archaeological and subfossil wood. By comparing them with growth patterns of contemporary trees from stands with well-known stand structure and …
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Chinese Tallow Long-Term Impact on Stand Dynamics in a Bottomland Hardwood Forest Following Vegetation Management
… examined Chinese tallow and native tree stand structure. Each native and Chinese tallow plot included three sets of nested subplots. The nested subplots include one overstory, one sapling, and four seedling subplots. R (v4.3.3) software was used to run repeated measures analysis of …
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MODELING DIAMETER DISTRIBUTION OF LOBLOLLY PINE PLANTATIONS IN RESPONSE TO MID-ROTATION THINNING TREATMENTS AND ASSING THE ECONOMIC RETURNS IN WESTERN GULF COASTAL PLAIN
… Thinning intensity significantly altered stand structure and product distribution, with moderate to heavy thinning increasing the proportion of sawtimber and overall financial returns, particularly on higher-quality sites. An analysis of variance revealed statistically significant effects …
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Soil respiration, microbial respiration and mineralisation in soils of montane rainforests of Southern Ecuador: influence of altitude
… along altitudinal gradients, changes in stand structure and net primary production can be observed that have not been fully explained yet. As causes reduced microbial activity and nitrogen turnover in soils of tropical montane forests have been suggested. Against the background of climate …
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