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Electronic Theses and Dissertations

Theses/Dissertations

2002

Articles 1 - 11 of 11

Full-Text Articles in Forest Sciences

Representational Analyses Of Conservation Lands In Maine, Stephanie Orndorff Dec 2002

Representational Analyses Of Conservation Lands In Maine, Stephanie Orndorff

Electronic Theses and Dissertations

The three studies reported here (i.e., statewide, southern Maine, and state and federal wildlife areas) identify what areas should be conserved to represent the natural diversity of Maine. Geographic Information System (GIs) technology was used to conduct the analyses comparing the distribution of abiotic and biotic variables representing natural diversity on and off conservation lands. In the statewide analysis, 10 environmental variables were compared on and off conservation lands using ArcGrid with a cell resolution of 1.86 x 1.86 km. The areas found to contain variables that were underrepresented were. combined to identify and map regions with under-represented characteristics. The …

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Tradeoff Analysis And Evaluation In The Management Of Forests For Multiple Uses. The Use Of Euclidean Distances As A Decision Support Tool, Milagros Alvarez Aug 2002

Tradeoff Analysis And Evaluation In The Management Of Forests For Multiple Uses. The Use Of Euclidean Distances As A Decision Support Tool, Milagros Alvarez

Electronic Theses and Dissertations

This research proposes the use of Euclidean distances as a decision support tool in forest ecosystem management in a framework of analysis that integrates linear programming, growth and yield simulation software and Geographic Information Systems. The developed methodology, which integrates economic, ecological and ecological values, helps decision makers better understand the implications of their decisions and the tradeoffs that occur when forest values compete. The study also tests the hypothesis that forest management directions that favor the greatest variety of conditions lead to a greater aggregate value than those directions that favor narrower goals. The study area is composed of …

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Impact Of Preservative Treatments And Fungal Exposure On Phenolic Fiber Reinforced Polymer (Frp) Composite Material Utilized In Wood Reinforcement, Cihat Tascioglu May 2002

Impact Of Preservative Treatments And Fungal Exposure On Phenolic Fiber Reinforced Polymer (Frp) Composite Material Utilized In Wood Reinforcement, Cihat Tascioglu

Electronic Theses and Dissertations

When wood products are exposed to environmental conditions conducive to biodeterioration, wood preservation becomes a necessity, especially when long-term utilization is desired. Although considerable literature exists on the treatment of laminated timbers and wood composites with wood preservatives, almost no information is available on the exposure of Fiber Reinforced Polymer (FRP) composites to wood preservative chemicals. In this work, FRP material was treated with common preservative chemicals and the effect of wood preservative treatments on mechanical properties of FRP material were investigated. Although the longitudinal elastic modulus was unaffected, some longitudinal strength losses were recorded for CCA and CDDC (water …

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Determining Atmospheric Deposition Inputs To Two Small Watersheds At Acadia National Park, Sarah J. Nelson May 2002

Determining Atmospheric Deposition Inputs To Two Small Watersheds At Acadia National Park, Sarah J. Nelson

Electronic Theses and Dissertations

Two small upland watersheds have been gauged and monitored at Acadia National Park since 1998. Cadillac Brook watershed burned in a wildfire in 1947. Hadlock Brook watershed has been undisturbed for several centuries, and serves as the reference site. Precipitation and throughfall volume and chemistry data have been collected using wetonly and continuously open collectors. Hydrologic and chemical inputs to the sites have been determined for each site. Differences in watershed and vegetation characteristics control the input of water and major ions to these watersheds. Vegetation type was the dominant control on enhancement of precipitation across the heterogeneous watersheds. Relative …

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The Role Of Forest Soils In A Northern New England Effluent Management System, Leslie B. Nelson May 2002

The Role Of Forest Soils In A Northern New England Effluent Management System, Leslie B. Nelson

Electronic Theses and Dissertations

The Carrabassett Valley Sanitary District in Carrabassett Valley, Maine has utilized both a forest spray irrigation system and a Snowfluent™ system for the treatment of their wastewater effluent. This study was designed to evaluate potential changes in soil properties after approximately 20 years of treatment in the forested spray irrigation site and three years of treatment in the field Snowfluent™ site. In addition, grass yield and composition were evaluated on the field study sites. After treatment with effluent or Snowfluent™, soils showed an increase in soil exchangeable Ca, Mg, Na, and K, base saturation, and pH. While most constituents were …

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Fire And Its Effects On Mercury And Methylmercury Dynamics For Two Watersheds In Acadia National Park, Maine, Kenneth B. Johnson May 2002

Fire And Its Effects On Mercury And Methylmercury Dynamics For Two Watersheds In Acadia National Park, Maine, Kenneth B. Johnson

Electronic Theses and Dissertations

Cross-continental movement of contaminated air masses and prevailing wind direction. Sites covered with softwood vegetation also received higher Hg deposition than other vegetation types because of the higher scavenging efficiency of the canopy structure. MeHg deposition was not affected by these factors. Hg deposition was lower in Cadillac Brook watershed (burned) than in Hadlock Brook watershed (unburned) because regeneration after the fire was dominated by mixed hardwood, whereas softwoods dominate the landscape in Hadlock Brook watershed. The lower deposition could also be a result of the watershed aspect; Cadillac Brook watershed faces southeast to east and Hadlock Brook watershed faces …

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The Influence Of Stand Density On Rate Of Carbon Sequestration In Loblolly Pine Plantations On Mined Lands In East Texas, Jason Morton Jan 2002

The Influence Of Stand Density On Rate Of Carbon Sequestration In Loblolly Pine Plantations On Mined Lands In East Texas, Jason Morton

Electronic Theses and Dissertations

The State of Texas emits more carbon dioxide (C02) into the atmosphere than any other state in the United States. With environmental concerns escalating, the U.S. may be forced to reduce its emissions of greenhouse gases. The first target of these reductions will likely be utility companies that utilize coalfired power plants. In order to mitigate CO2 emissions, utility companies may want to either purchase carbon credits which can be obtained through carbon sequestration on NIPF lands or manage reclaimed mined lands for maximum carbon sequestration. This study determined the financially optimal planting density and management regimes for loblolly pine …

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Localization Of Expansin Expression During Adventitious And Lateral Rooting In Response To Auxin In Loblolly Pine, Fuyu Xu Jan 2002

Localization Of Expansin Expression During Adventitious And Lateral Rooting In Response To Auxin In Loblolly Pine, Fuyu Xu

Electronic Theses and Dissertations

Loblolly Pine is the most important and widely cultivated timber species in the southern United States. Due to its fast growth, it is extensively planted for lumber and pulpwood. Vegetative propagation will enhance gains from genetic improvement of tree species. Rooted-cutting is at present the most reliable non-somatic embryogenesis method for cloning specific genotypes. However, an abrupt decline of adventitious rooting capacity has hindered the application of vegetative propagation in loblolly pine. Unraveling the rooting mechanism may facilitate a way to overcome this barrier. Regulation of lateral and adventitious root formation by auxin has been demonstrated through the application of …

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Wood Anatomy Of Metasequoia - Separation From Glyptostrobus And Function/Structure Considerations, George E. Visscher Jan 2002

Wood Anatomy Of Metasequoia - Separation From Glyptostrobus And Function/Structure Considerations, George E. Visscher

Electronic Theses and Dissertations

This thesis is part of a broader cooperative study aimed at understanding Paleo-forest dynamics -- namely those of the Eocene period in the Canadian High Arctic. Wood of the dominant tree species -- Metasequoia -- that grew on Axel Heiberg Island, Nunavut, Canada is the focus of this research. The text is divided into two chapters written as articles to be submitted to the International Association of Wood Anatomists Journal (IAWA). The first chapter of this text is a direct result of classifying the fossil wood of Axel Heiberg. The wood of Glyptostrobus is similar to that of Metasequoia. Because …

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Crop Tree Growth And Quality Twenty-Five Years After Precommercial Thinning In A Northern Conifer Stand, Leah M. Phillips Jan 2002

Crop Tree Growth And Quality Twenty-Five Years After Precommercial Thinning In A Northern Conifer Stand, Leah M. Phillips

Electronic Theses and Dissertations

Growth characteristics of selected Picea rubens Sarg. (red spruce) and Abies balsamea (L.) Mill. (balsam fir) crop trees were studied in a northern conifer forest to determine the effects of precommercial thinning (PCT) 25 years after initial treatment. Two measures of growth efficiency (GE, growth per unit of growing space) were examined: stemwood increment (dm3) per unit of projected leaf area (PLA) (m2) and stemwood increment (dm3) per unit of crown projection area (CPA) (m2). Stem form differences were evaluated by comparing stem taper between species and treatments. Branch diameters were measured between 1 .O - 2.0 meters above breast …

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Relationships Between Rooting Restrictions, Radial Growth, And Drought Stress With White Pine (Pinus Strobus) Decline In Southern Maine, Megan L. Fries Jan 2002

Relationships Between Rooting Restrictions, Radial Growth, And Drought Stress With White Pine (Pinus Strobus) Decline In Southern Maine, Megan L. Fries

Electronic Theses and Dissertations

Throughout southern Maine there was a noticeable decline and mortality of white pine (Pinus sfrobus) from 1997 through 2000 in dense pole-size stands. The decline was widespread, scattered, and happened simultaneously indicating that it was incited by an abiotic stress. Because only isolated stands showed decline and mortality, site factors likely predisposed trees to injury. Site factors are likely related to the widespread field abandonment that took place throughout southern and central Maine, and led to establishment of pure white pine stands in many areas. Although white pine can regenerate on many sites, some locations will have soil limitations, such …

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