Low acclimation capacity of narrow-ranging thermal specialists exposes susceptibility to global climate change.

Ecology and Evolution
Tricia M Markle, Kenneth H Kozak

Abstract

Thermal acclimation is hypothesized to offer a selective advantage in seasonal habitats and may underlie disparities in geographic range size among closely-related species with similar ecologies. Understanding this relationship is also critical for identifying species that are more sensitive to warming climates. Here, we study North American plethodontid salamanders to investigate whether acclimation ability is associated with species' latitudinal extents and the thermal range of the environments they inhabit. We quantified variation in thermal physiology by measuring standard metabolic rate (SMR) at different test and acclimation temperatures for 16 species of salamanders with varying latitudinal extents. A phylogenetically-controlled Markov chain Monte Carlo generalized linear mixed model (MCMCglmm) was then employed to determine whether there are differences in SMR between wide- and narrow-ranging species at different acclimation temperatures. In addition, we tested for a relationship between the acclimation ability of species and the environmental temperature ranges they inhabit. Further, we investigated if there is a trade-off between critical thermal maximum (CTMax) and thermal acclimation ability. MCMCglmm results show a...Continue Reading

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Citations

Feb 20, 2019·Global Change Biology·Sigurd EinumTim Burton
Jun 18, 2019·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Heidi J MacLeanJohannes Overgaard
Jan 16, 2020·Ecology and Evolution·Susana PallarésDavid Sánchez-Fernández
Mar 20, 2020·Evolution; International Journal of Organic Evolution·Vincent R FaralloDonald B Miles
Apr 24, 2020·Evolution; International Journal of Organic Evolution·Sam WeaverKenneth H Kozak
Nov 22, 2020·The Science of the Total Environment·Patricio H ManríquezKatherina Brokordt
Sep 11, 2020·The Science of the Total Environment·Corie A FultonMichael J Lydy

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Software Mentioned

R
Worldclim
R Development Core Team
ape
DIVA
MCMCglmm
geiger
‐ GIS

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