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Patch Selection By Wintering White-Tailed Deer : Consequences For Eastern Hemlock Regeneration At Local And Landscape Scales, Jill Christine Witt
Patch Selection By Wintering White-Tailed Deer : Consequences For Eastern Hemlock Regeneration At Local And Landscape Scales, Jill Christine Witt
Dissertations, Master's Theses and Master's Reports - Open
Tsuga canadensis (eastern hemlock) is a highly shade-tolerant, late-successional, and long-lived conifer species found throughout eastern North America. It is most often found in pure or nearly pure stands, because highly acidic and nutrient poor forest floor conditions are thought to favor T. canadensis regeneration while simultaneously limiting the establishment of some hardwood species with greater nutrient requirements. Once a common species, T. canadensis is currently experiencing widescale declines across its range. The hemlock woolly adelgid (Adelges tsugae) is decimating the population across its eastern distribution. Across the Upper Great Lakes region, where the adelgid is currently being …
A Comparison Of Ground Cover And Frequency Estimation Methods For Post-Harvest Soil Monitoring, Curtis David Kvamme
A Comparison Of Ground Cover And Frequency Estimation Methods For Post-Harvest Soil Monitoring, Curtis David Kvamme
Dissertations, Master's Theses and Master's Reports - Open
The amount and type of ground cover is an important characteristic to measure when collecting soil disturbance monitoring data after a timber harvest. Estimates of ground cover and bare soil can be used for tracking changes in invasive species, plant growth and regeneration, woody debris loadings, and the risk of surface water runoff and soil erosion. A new method of assessing ground cover and soil disturbance was recently published by the U.S. Forest Service, the Forest Soil Disturbance Monitoring Protocol (FSDMP). This protocol uses the frequency of cover types in small circular (15cm) plots to compare ground surface in pre- …
Golden-Winged Warbler Habitat Model Validation For Northern Wisconsin And Central Minnesota, Alexandra E. Wrobel
Golden-Winged Warbler Habitat Model Validation For Northern Wisconsin And Central Minnesota, Alexandra E. Wrobel
Dissertations, Master's Theses and Master's Reports - Open
Between 1966 and 2003, the Golden-winged Warbler (Vermivora chrysoptera) experienced declines of 3.4% per year in large parts of the breeding range and has been identified by Partners in Flight as one of 28 land birds requiring expedient action to prevent its continued decline. It is currently being considered for listing under the Endangered Species Act. A major step in advancing our understanding of the status and habitat preferences of Golden-winged Warbler populations in the Upper Midwest was initiated by the publication of new predictive spatially explicit Golden-winged Warbler habitat models for the northern Midwest. Here, I use …