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 75 for “"forest inventory"”.
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Incorporating GIS topographic information in forest inventory estimates
… information system (GIS), in which a 100% inventory of certain measurements can be stored and manipulated, can provide inexpensive, low variance timber stand volume estimates. Timber volume can be correlated to such topographic variables as slope, aspect, slope position, slope shape, and …
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Use of prior distributions from aerial photographs in forest inventory
Bayesian estimates of gross cubic- foot volume per acre were computed for four stand types (plantation pine, natural pine. hardwood. and mixed wood stands) using aerial photo volume tables as the prior information source. Aerial photographs provided a reliable source of information even though most …
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A decisionmaking framework for assessing atmospheric deposition impacts on regional forest inventory
… deposition impacts on regional softwood inventory in Virginia. This decision making framework consists of three segments: a forest inventory projection model, a timber production function, and a timber consumption model. The Timber Resource Inventory Model (TRIM) was used to project …
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Spatiotemporal Informatics for Sustainable Forest Production Utilizing Forest Inventory and Remotely Sensed Data
… for assessing the status and trends of forests, trees, their products, and their services. Techniques for using readily available data such as the Forest Inventory and Analysis (FIA) database and output from forest disturbance detection algorithms derived from Landsat data, such as …
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Assessing the Accuracy of Lidar as a Forest Inventory Tool Using Individual Stem Identification and Attribution
… used and accurate remote sensing tools for forest inventory. The means by which the lidar data is used to accomplish these inventories varies greatly. This study examines the use of individual tree detection and attribution to assess various forest characteristics, along with testing two …
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Assessing the Accuracy of Lidar as a Forest Inventory Tool Using Individual Stem Identification and Attribution
… used and accurate remote sensing tools for forest inventory. The means by which the lidar data is used to accomplish these inventories varies greatly. This study examines the use of individual tree detection and attribution to assess various forest characteristics, along with testing two …
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Improving Precision in Forest Inventory through Small Area Estimation for Loblolly Pine Plantations in Coastal Georgia
The use of small area estimation (SAE) in forest inventory has shown promise for improving the precision of estimates needed for informed decision-making when sample data are sparse. We evaluated the potential of unit-level SAE for increasing the precision of stand-level estimates of basal area, …
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Assessing the effects of field plot size and stand structure on forest inventory estimates derived from laser altimetry data
… field data in a two-stage procedure to predict forest inventory parameters. However, the effects of varying plot size on the prediction errors are not well understood. We investigated the effects of plot size on prediction errors using lidar data for a western Montana forest using five sizes …
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Assessing the effects of field plot size and stand structure on forest inventory estimates derived from laser altimetry data
… field data in a two-stage procedure to predict forest inventory parameters. However, the effects of varying plot size on the prediction errors are not well understood. We investigated the effects of plot size on prediction errors using lidar data for a western Montana forest using five sizes …
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Evaluating Population-Habitat Relationships of Forest Breeding Birds at Multiple Spatial and Temporal Scales Using Forest Inventory and Analysis Data
Multiple studies have documented declines of forest breeding birds in the eastern United States, but the temporal and spatial scales of most studies limit inference regarding large scale bird-habitat trends. A potential solution to this challenge is integrating existing long-term datasets such as …
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The Carbon Density and Species Diversity of Myanmar's Tropical Forests
Tropical forests play a vital role in climate change because they may act as sinks or sources of CO2 depending on their management and responses to climate. Satellite imagery indicates that 3.8% of Myanmar's forests were lost between 2001 and 2020, but the extent to which commercial forestry is …
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A comparison of forest growth and yield models for inventory updating
… growth and yield models can be used to update forest inventories and a GIS is a common method for maintaining forest inventory data, this compatibility provided a method to rapidly update past forest inventory records. This system was used to evaluate four different loblolly pine growth and …
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Decision Support for Operational Plantation Forest Inventories through Auxiliary Information and Simulation
Informed forest management requires accurate, up-to-date information. Ground-based forest inventory is commonly conducted to generate estimates of forest characteristics with a predetermined level of statistical confidence. As the importance of monitoring forest resources has increased, budgetary …
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Factors influencing basal area growth of yellow-poplar ( Liriodendron tulipifera L.) in central West Virginia
This paper uses data from continuous forest inventory (CFI) plots to evaluate basal area growth of yellow-poplar (Liriodendron tulipifera L.) as related to four topographic factors (aspect, slope position, steepness, and landform), two competition variables (basal area per acre and trees per acre) …
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The Economics of management effort in planted forests: an empirical analysis of fertilization and thinning prescriptions of Pinus taeda in the US South
… is to maximize his/her profits from planted forest investments, questions such as when and where exactly they should fertilize, thin and clearcut must be answered. We take advantage of an experiment established in 5 different states in the US South. Forest inventory data was collected for …
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Geological Control of Floristic Composition in Amazonian Forests
… largest remaining tracts of undisturbed tropical forest on earth, and is thus critical to international nature conservation and carbon sequestration efforts. Amazonian forests are notoriously difficult to study, however, due to their species richness and inaccessibility. This has limited efforts …
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Testing methods for calibrating Forest Vegetation Simulator (FVS) diameter growth predictions
The Forest Vegetation Simulator (FVS) is a growth and yield modeling system widely-used for predicting stand and tree-level attributes for management and planning applications in North American forests. The accuracy of FVS predictions for a range of tree and stand level attributes depends a great …
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Potential beaver colony density in parts of Québec
… areas were located in mature northern hardwood forest. This research focused principally on the first study area, Papineau-Labelle Wildlife Reserve, where beaver colony density and habitat variables were studied at a 1:20,000 scale on 20 4-sq-km sample plots. Over 700 habitat variables were …
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