Off-campus UMass Amherst users: To download campus access dissertations, please use the following link to log into our proxy server with your UMass Amherst user name and password.
Non-UMass Amherst users: Please talk to your librarian about requesting this dissertation through interlibrary loan.
Dissertations that have an embargo placed on them will not be available to anyone until the embargo expires.
Author ORCID Identifier
Open Access Dissertation
Doctor of Philosophy (PhD)
Year Degree Awarded
Month Degree Awarded
Toni Lyn Morelli
Chris S. Sutherland
John A. Litvaitis
L. Scott Mills
Applied Statistics | Biodiversity | Biostatistics | Ecology and Evolutionary Biology | Forest Management | Population Biology | Zoology
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, using data collected from 6 years (2014–2019) of fieldwork. My third chapter again used this theory and classical understanding of density-dependence to evaluate factors influencing snowshoe hare populations along their trailing edge in the northeastern US. Finally, for my fourth chapter, I used the model outputs from the second chapter to compare current and future distributions based on causal and correlational frameworks given projected changes in snowpack and forest biomass.
Siren, Alexej P., "Interacting effects of climate and biotic factors on mesocarnivore distribution and snowshoe hare demography along the boreal-temperate ecotone" (2020). Doctoral Dissertations. 1977.
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial 4.0 License