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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 55 for “"timber harvest"”.
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Incorporating financial analysis into timber harvest scheduling models
… and adapted to a forest products firm’s timber harvest scheduling model in an attempt to increase its net present value of harvest returns, using alternative harvest criteria. The firm’s original harvest scheduling model was used as a control model for the study. A net present value …
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Maximizing wildlife benefits through hardwood timber harvest scheduling
A computerized system for planning timber harvest to maximize habitat quality over time for a specified group of wildlife species was developed for upland oak forests of the Eastern United States. This system, called WILDWOOD for WILDiife/WOOD optimization system, is designed to run on a …
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Investigation of the Effects of Timber Harvest On Artifact Locations
<p>This thesis looks at the effect of timber harvesting on archaeological resources. Before federal agencies undertake any activity on federal land, Section 106 of the National Historic Preservation Act (NHPA) requires that they consider how their work will affect cultural resources. Assessments …
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Effects of Infanticide Risk and Timber Harvest on American Black Bear Space Use
… that maybe influenced by infanticide risk and timber harvest. I used generalized linear mixed models (GLMM) to determine if female American black bear (<em>Ursus americanus</em>) space use was consistent with avoidance behavior to reduce infanticide risk in the Upper Peninsula of Michigan …
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An evaluation of timber harvest planning training on logging quality in the Virginia Piedmont
… has increased dramatically in recent years. Harvest planning is a critical component of forestry water quality BMPs. All states’ BMP manuals recommend written timber harvest plans, and several states require them by law. The objective of this study was to evaluate the impact of harvest …
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The Introduction of a Chip Mill: Effects on Deforestation Rates and Timber Harvest Locations in Southeast Missouri
… mills and its effects on deforestation rates and timber harvest locations in southeast Missouri. One objective of this study was to locate areas of deforestation and reforestation in the time periods before and after the introduction of the chip mill using remote sensing methods. Another objective …
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An evaluation of pre- and post-timber harvest water quality in low-order streams in the Missouri Ozarks
… collected for approximately three years prior to harvest and two to three years after harvest. The comparison of pre-and post-harvest samples showed that six of the twelve water quality parameters (TSS, TVSS, Ca, K, NO[superscript 3 -] and SRP) had probabilities that the post-harvest concentration …
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Impact Of Timber Harvest On Mercury Mobilization In A Mixed Pine And Hardwood Forest And Adjacent Lake In Mississippi
… in forest, Mississippi is a leader in the timber industry. Whereas forestry provides numerous benefits for humans and wildlife, forest harvest has been hypothesized to increase mercury (Hg) mobilization to aquatic systems. In a forest, Hg mostly accumulates in the upper layer of soil, where …
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Analysis of timber harvest scheduling under alternative levels of land aggregation: an application to a hypothetical Mexican forest ownership
… Mexico. Factor analysis was applied to eighteen timber inventory variables to produce four independent and meaningful constructs that explained 87% of the total variable set’s variation. Next, each planning unit area was characterized by its factor scores and an Euclidean-metric based analysis …
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Effects of Harvesting Ponderosa Pine on Birds in the Black Hills of South Dakota and Wyoming
Timber harvest is the primary land management action altering wildlife habitat in ponderosa pine (Pi nus ponderosa) forests of the Black Hills of South Dakota and Wyoming. Yet, the effects of timber harvest on avian communities in this region is poorly understood. The desired future condition of …
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Wolf Selection of Human-Modified Linear Features and Cover Types When Hunting and Killing White-Tailed Deer Fawns
… how anthropogenic disturbances—specifically timber harvest areas and linear features—and cover types influence where wolves hunt and kill fawns. During 2016–2019, I fit wolves with 20-min-fix-interval Global Positioning System (GPS) collars and searched clusters of GPS-locations to identify …
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Landscape pattern analysis related to forest wildlife resources
… resulting from proposed landscape changes. Timber harvest schemes with a few large units and those in clustered arrangements led to less fragmentation than those schemes with several small units or those dispersed across the landscape. The placement of roads had either an invasive or …
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Potential effects of technical assistance foresters on pine planting on non-industrial private forestland in the South
Over the next few decades, timber harvest levels on the South's non-industrial private forestlands (NIPFs) are projected to increase by 40 percent. These ownerships include 75 percent of the commercial timberland in the South, and account for 64 percent of the timber volume harvested in the region …
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Exploiting Overlapping Landsat Scene Classifications and Focal Context to Identify Boreal Disturbance Mapping Uncertainty
… classified to identify historic fire and timber harvesting disturbances within Ontario. This thesis identifies and flags areas of classification uncertainty within BorealDB and scrutinizes them to assess classification confidence. The focal context of all orthogonal neighbour states was …
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Tracks in the Woods: Identifying and Evaluating Historic Logging Railroad Systems within the Mt. Baker-Snoqualmie National Forest
… landscape features associated with the SRLC's timber harvest activities. The systematic identification and documentation of this single company's logging operations and the features that resulted from those operations can be used to assist cultural resource managers facing the same task …
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A spatial stochastic programming model for timber and core area management under risk of stand-replacing fire
Forest harvest scheduling has been modeled using deterministic and stochastic programming models. Past models seldom address explicit spatial forest management concerns under the influence of natural disturbances. In this research study, we employ multistage full recourse stochastic programming …
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A linear programming approach to evaluating forest management alternatives
… linear programming model to the evaluation of timber harvest alternatives of a specific forest enterprise was examined. The use of linear programming to describe a program in which profit is maximum rather than one of several other economic allocation models was justified. The basic model, …
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Effects of riparian buffer width on stream salamander populations in the southern Appalachian Mountains
… Carolina to determine the impacts of even-aged timber harvest on salamander populations and to assess the efficacy of riparian buffers in ameliorating these effects. My data show that larval two-lined salamanders are negatively impacted by increased stream sedimentation following riparian …
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Effects of Timber Harvesting on Terrestrial Salamander Abundance and Behavior
We examined the short-term (1 - 4 years postharvest) effects of 7 silvicultural treatments on terrestrial salamander populations at 4 sites in southwest Virginia and West Virginia. The 3 silvicultural treatments with the most canopy removal (4-7 m2 basal area Shelterwood, Leavetree, Clearcut) had …
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Comparing linear programming and mixed integer programming formulations for forest planning on the Naval Surface Weapons Center, Dahlgren, Virginia
… northeastern Virginia. Linear programming-based timber management scheduling models were constructed utilizing the Model I formulation of Johnson and Scheurman (1977). The models were formulated as mixed strata-based, area-based models (Johnson and Stuart 1987) that maximized present net worth …
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