Gregory W. Thiemann
York University
63 Papers
344 Citations
Gregory W. Thiemann is an academic researcher from York University. The author has contributed to research in topics: Ursus maritimus & Sea ice. The author has an hindex of 26, co-authored 60 publications. Previous affiliations of Gregory W. Thiemann include Dalhousie University & Keele University.
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Papers
Polar bear diets and arctic marine food webs: insights from fatty acid analysis
TL;DR: Analysis of the diets of 1738 individual polar bears sampled across the Canadian Arctic over a 30-year span indicates that polar bears are capable of opportunistically altering their foraging to take advantage of locally abundant prey, or to some degree compensating for a decline in a dominant prey species.
Predicting survival, reproduction and abundance of polar bears under climate change.
TL;DR: In this paper, the authors explore how models can be used to predict polar bear population responses under climate change and suggest the development of mechanistic models aimed at predicting reproduction and survival as a function of the environment.
226
Variation in the response of an Arctic top predator experiencing habitat loss: feeding and reproductive ecology of two polar bear populations
Karyn D. Rode,Eric V. Regehr,David C. Douglas,George M. Durner,Andrew E. Derocher,Gregory W. Thiemann,Suzanne M. Budge +6 more
TL;DR: Higher biological productivity and prey availability in the CS relative to the SB, and a shorter recent history of reduced sea ice habitat, may explain the maintenance of condition and recruitment of CS bears.
206
Migration phenology and seasonal fidelity of an Arctic marine predator in relation to sea ice dynamics
TL;DR: The links between increased atmospheric temperatures, sea ice dynamics, and the migratory behaviour of an ice-dependent species emphasizes the importance of quantifying and monitoring relationships between migratory wildlife and environmental cues that may be altered by climate change.
157
Conservation status of polar bears (Ursus maritimus) in relation to projected sea-ice declines.
Eric V. Regehr,Kristin L. Laidre,H. Resit Akçakaya,Steven C. Amstrup,Todd C. Atwood,Nicholas J. Lunn,Martyn E. Obbard,Harry L. Stern,Gregory W. Thiemann,Øystein Wiig +9 more
TL;DR: The findings support the potential for large declines in polar bear numbers owing to sea-ice loss, and highlight near-term uncertainty in statistical projections as well as the sensitivity of projections to different plausible assumptions.
126