Author:
Merchant Hana N.,Thirkell Jack E.,Portugal Steven J.
Abstract
AbstractA vast array of challenging environments are inhabited by mammals, such as living in confined spaces where oxygen levels are likely to be low. Species can exhibit adaptations in basal metabolic rate (BMR) to exploit such unique niches. In this study we use 801 species to determine the relationship between BMR and burrow use in mammals. We included pre-existing data for mammalian BMR and 16 life history traits. Overall, mammalian BMR is dictated primarily by environmental ambient temperature. There were no significant differences in BMR of terrestrial, semi-fossorial and fossorial mammals, suggesting that species occupying a subterranean niche do not exhibit baseline metabolic costs on account of their burrowing lifestyle. Fossorial mammals likely show instantaneous metabolic responses to low oxygen in tunnels, rather than exhibit adaptive long-term responses in their BMR.
Funder
Natural Environment Research Council
Publisher
Springer Science and Business Media LLC
Reference78 articles.
1. Pettersen, A. K., White, C. R. & Marshall, D. J. Metabolic rate covaries with fitness and the pace of the life history in the field. Proc. R. Soc. B Biol. Sci. 283(1831), 3–23 (2016).
2. White, C. R. & Kearney, M. R. Determinants of inter-specific variation in basal metabolic rate. J. Compar. Physiol. B 183(1), 1–26 (2013).
3. Mathot, K. J., Dingemanse, N. J. & Nakagawa, S. The covariance between metabolic rate and behaviour varies across behaviours and thermal types: Meta-analytic insights. Biol. Rev. 94(3), 1056–1074 (2019).
4. Biro, P. A. & Stamps, J. A. Do consistent individual differences in metabolic rate promote consistent individual differences in behavior? Trends Ecol. Evol. 25(11), 653–659 (2010).
5. Mathot, K. J. & Dingemanse, N. J. Energetics and behavior: Unrequited needs and new directions. Trends Ecol. Evol. 30(4), 199–206 (2015).