![]() ![]() We also found significant, positive relationships between acclimation ability and environmental thermal range, and between acclimation ability and CTMax. Salamanders with wide latitudinal distributions maintain or slightly increase SMR when subjected to higher test and acclimation temperatures, whereas several narrow-ranging species show significant metabolic depression. MCMCglmm results show a significant difference in acclimation ability between wide and narrow-ranging temperate salamanders. Further, we investigated if there is a trade-off between critical thermal maximum (CTMax) and thermal acclimation ability. In addition, we tested for a relationship between the acclimation ability of species and the environmental temperature ranges they inhabit. 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. 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. 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. Understanding this relationship is also critical for identifying species that are more sensitive to warming climates. 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. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |