Forest Sciences Commons^™

Land Degradation And Desertification In Arid And Semiarid Regions, Youssef Bahddou

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Definitions of desertification have been numerous and the subject of hot debate. The definition proposed in 1991 by United Nations UNEP's Desertification Control/Programme Acting Centre (DC/PAC) was "land degradation in arid, semiarid and dry sub-humid areas resulting mainly from adverse human impact". This definition incorporates a number of processes which lead to the impoverishment of soils and vegetation, where human activity has been the main contributory factor. Examples include the loss of organic matter, increase in soil bulk density, decrease in infiltration, high levels of erosion, dunes formation, salinization, and compaction and displacement of top soil. The definition noted above …

Effectiveness Of Carbaryl And Pyrethroid Insecticides For Protection Of Engelmann Spruce From Attack By Spruce Beetle (Coleoptera: Scolytidae), Karen J. Johnson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A field experiment tested the effectiveness of carbaryl and two pyrethroid insecticides, cyfluthrin and esfenvalerate, in protecting high-value Engelmann spruce trees from attack by Dendroctonus rufipennis Kirby. Carbaryl suspension at the 2% registered rate and a reduced rate of 1 % were both effective in protecting Engelmann spruce from attack by D. rufipennis through two pheromone baiting periods and 24 months following insecticide application. Cyfluthrin at 0.025% rate and esfenvalerate at 0.025 and 0.05% rates provided effective protection through one pheromone baiting and 12 months following insecticide application. Only cyfluthrin at 0.008% rate was judged ineffective protection 12 months following …

Second Growth Forest As Potential Marten Habitat In Western Newfoundland: An Examination Of Forest Habitat Structure And Microtine Abundance, Brian R. Sturtevant

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The American marten (Martes americana) is associated with large tracts of relatively undisturbed, mature coniferous forests. I examined coarse woody debris (CWD) structure and small mammal abundance with respect to forest age and stem structure within second-growth forests, in comparison with old-growth stands in western Newfoundland. Results suggest that a critical change in marten habitat quality may occur at stand senescence, due to decreased tree competition, more complex subcanopy structure, and increased meadow vole (Microtus pennsylvanicus) abundance.

Analysis of stem structure within a chronosequence of 19 second-growth stands indicated high intertree competition, with dense canopy closure …

Integration Of Special Sensor Microwave/Imager (Ssm/I) And In Situ Data For Snow Studies From Space, Changyi Sun

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Special Sensor Microwave/Imager (SSM/I) radiometer is a useful tool for monitoring snow conditions and estimating snow water equivalent and wetness because it is sensitive to the changes in the physical and dielectric properties of snow. Development and improvement of SSM/I snow-related algorithms is hampered generally by the lack of quantitative snow wetness data and the restriction of a fixed uniform footprint. Currently, there is a need for snow classification algorithms for terrain where forests overlie snow cover.

A field experiment was conducted to examine the relationship between snow wetness and meteorological variables. Based on the relationship, snow wetness was …

Environmental Mediation: An Assessment And Case Study Of The Logan Canyon Highway Controversy, Jared Glenn Parkinson

Undergraduate Honors Capstone Projects

For a little more than twenty years, alternative methods of dispute management have been employed to address various environmental conflicts in order to avoid the more traditional method of litigation. Mediation is a voluntary process which involves face-to-face negotiation among parties and the use of a neutral third-party negotiator. Environmental mediation has helped manage disputes related to land use, natural resource management, use of public lands, water resources, energy development, air quality and toxins (Bingham 1986).