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Full-Text Articles in Life Sciences
Representational Analyses Of Conservation Lands In Maine, Stephanie Orndorff
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 …
Tradeoff Analysis And Evaluation In The Management Of Forests For Multiple Uses. The Use Of Euclidean Distances As A Decision Support Tool, Milagros Alvarez
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 …
Crop Tree Growth And Quality Twenty-Five Years After Precommercial Thinning In A Northern Conifer Stand, Leah M. Phillips
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 …