Lack of behavioral responses of moose (Alces alces) to high ambient temperatures near the southern periphery of their range
- 1 October 2010
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Zoology
- Vol. 88 (10), 1032-1041
- https://doi.org/10.1139/z10-071
Abstract
Although fundamental factors limiting geographic ranges are understood for many animal species, there is less certainty regarding how such factors influence the behavior of individuals near distributional edges. We tested the hypothesis that climate limits the southern distribution of moose ( Alces alces (L., 1758)) by documenting space use and behavior of 36 females at the margin of the species’ range in Ontario, Canada. We assessed temperature differences among habitats and related changes in seasonal habitat use and daily movement patterns in response to temperature. Ambient temperatures frequently exceeded the thresholds of –5 °C (winter) and 14 °C (summer), above which moose are supposed to be thermally stressed. We detected no differences in habitat use relative to thermoregulation thresholds. However, moose exhibited reduced movement when snow was deep and were more active at dawn and dusk. Low variability in temperature among habitat types implied that functional thermal shelters were absent. We suggest that moose in their southern range either ameliorate heat stress at a finer resolution than we measured or are more resilient to temperature than previously thought. Additional evidence linking temperatures with negative responses is necessary before the prevalent hypothesis of heat stress limiting the southern distribution of moose can be fully assessed.Keywords
This publication has 29 references indexed in Scilit:
- Home Range and Movement Rates of Female Exurban White‐Tailed DeerThe Journal of Wildlife Management, 2010
- Linking moose habitat selection to limiting factorsEcography, 2005
- Movement and Activity Patterns of Eastern Coyotes In a Coastal, Suburban EnvironmentNortheastern Naturalist, 2004
- Bioenergetic Prediction of Climate Change Impacts on Northern MammalsIntegrative and Comparative Biology, 2004
- Costs and consequences of evolutionary temperature adaptationTrends in Ecology & Evolution, 2003
- Ecological responses to recent climate changeNature, 2002
- Temperature or Transport? Range Limits in Marine Species Mediated Solely by FlowThe American Naturalist, 2000
- Spatial dynamics of a migratory wolf population in winter, south-central Ontario (1990-1995)Canadian Journal of Zoology, 1999
- Moose selection of canopy cover types related to operative temperature, forage, and snow depthCanadian Journal of Zoology, 1991
- Activity and Movements of Female White-Tailed Deer during the RutThe Journal of Wildlife Management, 1989