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Full-Text Articles in Life Sciences
Interacting Effects Of Climate And Biotic Factors On Mesocarnivore Distribution And Snowshoe Hare Demography Along The Boreal-Temperate Ecotone, Alexej P. Siren
Interacting Effects Of Climate And Biotic Factors On Mesocarnivore Distribution And Snowshoe Hare Demography Along The Boreal-Temperate Ecotone, Alexej P. Siren
Doctoral Dissertations
The motivation of my dissertation research was to understand the influence of climate and biotic factors on range limits with a focus on winter-adapted species, including the Canada lynx (Lynx canadensis), American marten (Martes americana), and snowshoe hare (Lepus americanus). I investigated range dynamics along the boreal-temperate ecotone of the northeastern US. Through an integrative literature review, I developed a theoretical framework building from existing thinking on range limits and ecological theory. I used this theory for my second chapter to evaluate direct and indirect causes of carnivore range limits in the northeastern US, …
The Ecological Value Of Spruce Plantations In Massachusetts, Calvin Ritter
The Ecological Value Of Spruce Plantations In Massachusetts, Calvin Ritter
Masters Theses
The establishment of monoculture plantations of exotic tree species is common practice for supplementing native timber stocks. Such plantations typically provide inferior habitat for wildlife compared to native forest, which may result in a net reduction in biodiversity. However, some studies report that plantations may increase net biodiversity at the landscape scale by introducing novel habitats or supplementing existing natural forests. Using point count surveys, I examined six mature Norway spruce (Picea abies) plantations in western Massachusetts in 2016 and 2017 to evaluate bird use of these habitats relative to native forest stands. Count data were analyzed using …
The Effect Of Pruning Treatments On The Vibration Properties And Wind-Induced Bending Moments Of Senegal Mahogany (Khaya Senegalensis) And Rain Tree (Samanea Saman) In Singapore, Daniel Burcham
Doctoral Dissertations
During pruning, arborists often intend to increase a tree’s resistance to wind loading by selectively removing branches, but there are few studies examining the efficacy of these interventions, especially for large, open-grown trees. In this study, the mass and vibration properties of Senegal mahogany (Khaya senegalensis) and rain tree (Samanea saman) were measured before and after the crowns of trees were incrementally raised or reduced between 0 and 80%. In addition, the wind-induced vibration and bending moments of Senegal mahoganies were monitored before and after the same pruning treatments. For both species, total mass and leaf …