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.
Results
Showing 1 to 20 of 24 for “"clearcutting"”.
-
Impact of clearcutting on indigenous mammals of southwest Virginia
Three areas of similar physiographic characteristics were investigated; a control (60 to 100-yr-old forest) and 2 clearcuts (a 2-yr-old and 6- to 7-yr-old cut). These areas were located in the Craig Creek watershed of Montgomery and Craig Cos., Virginia. Two growing seasons after clear cutting it …
-
Changes in stand structure and species diversity following clearcutting in central Appalachian hardwoods
The clearcutting of second-growth Appalachian hardwood forests may cause a reduction in species diversity of the new cohort. This study measured changes in species composition, diversity, and stand structural characteristics following clearcutting of a second-growth hardwood forest. To evaluate the …
-
Oak regeneration after clearcutting on steep slopes in the ridge and valley province of southwest Virginia
… was studied during a two-year period following clearcutting and whole-tree removal in eight midslope stands in the Ridge and Valley Province of southwestern Virginia. Oak regeneration was also characterized in several older clearcuts. Height and diameter of oaks of stump sprout origin in the …
-
Nutrient dynamics of the forest floor in an Appalachian oak forest stand following clearcutting and whole-tree removal
… upland Appalachian oak forest stands following clearcutting and whole-tree removal. Samples from the L, F, H, and A₁ layers were collected during June, August, and November of 1979 and 1980. Monthly litterfall was collected from October, 1979, through October, 1980. Soil solution samples were …
-
Amphibian Population and Community Characteristics, Habitat Relationships, and First-Year Responses to Clearcutting in a Central Appalachian Industrial Forest
The overall goal of this project was to provide baseline data on amphibian species richness, relative abundance, and habitat use for a long-term landscape ecology study on MeadWestvaco industrial forest in the Allegheny Highlands of West Virginia. From results of area-constrained daytime searches …
-
The impact of group selection silviculture on timber harvesting cost in the southern Appalachians
… from traditional even-aged management and clearcutting to uneven-aged management and group selection silviculture. Group selection, with its small 1/2-to-2-acre patch cuts widely dispersed throughout a timber stand, has the potential to substantially increase timber harvesting costs over …
-
Effects of Clearcutting with Whole Tree Harvesting on Woody and Herbaceous Plant Diversity After 17-Years of Regrowth in a Southern Appalachian Forest
This study examines the effects of clearcut regeneration with whole-tree harvesting on plant diversity. Three approaches were used to study changes in species composition and structure: (1) forest level, (2) stand level, and (3) diversity indices. Within each approach the forest was stratified into …
-
Effects of group selection and clearcut openings on wildlife in Appalachian hardwood forests
… as an alternative silvicultural system to clearcutting in Appalachian hardwood forests, but there is little, if any, information on the effects of group selection on wildlife. Thus, I studied and compared the effects of group selection and clearcut openings on wildlife in the Jefferson …
-
Influences of varying stand harvest methods on timber harvesting costs in southwestern Virginia hardwoods
… selection harvested at a 21% slower rate than clearcutting. Harvest cost per cord was 25.8% greater. Variation in cost was caused mainly by the increased average skid distances present in the groups. Every 100 foot increase in skid distance resulted in a $0.68 increase in cost per cord for …
-
Effects of forest disturbance on shredder production in headwater streams
… in reference streams. Providing that forest clearcutting is accomplished with minimal physical disturbance to streams, shredder populations may exhibit greater production in streams 11-years after forest clearcutting than in reference forest streams.
-
The economic feasibility of modifying six conventional harvesting systems to recover logging residues for fuel and fiber
… will be profitable on most southern stand types. Clearcutting fqr energy and thinning for energy were not economical on any stand due to the loss of revenues from conventional products. As woody fuel prices go up, this situation will change. Results· showed that the machine energy required to …
-
Economic Comparisons Between an Even-Aged and an Uneven-Aged Loblolly Pine Silvicultural System
… Aside from the aesthetic benefits of avoiding clearcutting under uneven-aged silviculture, non-timber considerations between loblolly pine silvicultural systems are not well documented. Resource professionals hold opinions often in direct conflict with each other regarding the non-timber costs …
-
Clearcut Solutions? An Evaluation of Partial Harvesting in the Black Spruce Boreal Forest
… are long, regulated even-aged management by clearcutting has truncated forest age-class distributions. Partial harvesting has been proposed as a means to maintain the structural complexity and biodiversity associated with old forests while allowing continued timber production. Despite the …
-
New Landowners in Virginia's Forest: A Study of Motivations, Management Activities, and Perceived Obstacles
… in forestry professionals, and attitudes about clearcutting and harvesting practices. The results suggest that private property rights are not an insurmountable problem to ecosystem management efforts. The forestry profession, however, seems to suffer from an invisibility problem among the …
-
Conservation and management of the Allegheny woodrat in the central Appalachians
… representing two timber harvesting methods, clearcutting and diameter-limit harvesting, and unharvested controls. Home range and foraging distance estimates were calculated from telemetry locations and compared among treatments. Microhabitat variables were measured within plots centered …
-
Forest floor seed banks and their response to slashburning in some forest ecosystems in south central British Columbia
… and their response to the common disturbances of clearcutting and slashburning, was conducted in the Engelmann Spruce - Subalpine Fir (ESSF) and Interior Cedar - Hemlock (ICH) biogeoclimatic zones of south central B.C. Studies were carried out on the Devil's Club - Ladyfern sites series in the …
-
Managerial and operational characteristics of "safety successful" logging contractors
… terms of age, education, harvesting method (i.e. clearcutting), crew size, method of payment, and harvesting system (i.e. mechanical felling with gate and motor-manual delimbing). However, the contractors in this study had more business experience, higher production rates, higher utilization of …
-
Potential beaver colony density in parts of Québec
… variations, whereas in the boreal forest where clearcutting and fires disturbed the forest, a significant portion of beaver colony density variation seemed to be explained by food abundance differences. The sets of models in Papineau-Labelle and the St. Lawrence North Shore are considered of …
-
Potential Effects of Forestry Best Management Practices and Implementation Rates on Soil and Water Resources in the Southeastern United States
… that most of the erosion generated by clearcutting operations in the southeast is trapped in either the harvest area or in Streamside Management Zones (SMZs) prior to reaching the stream. In the third manuscript, BMP implementation rates and erosion estimates were categorized into three …
-
Effects of Alternative Silvicultural Treatments on Regeneration in the Southern Appalachians
… the southern Appalachians have moved away from clearcutting in favor of variable retention harvesting systems. A study was initiated in 1995-8 to investigate the effects of retaining varying numbers of residual trees on regeneration in seven silvicultural treatments. A second study specifically …
Page 1 of 2