Geographic variation and thermal plasticity shape salamander metabolic rates under current and future climates.

ABSTRACT: Predicted changes in global temperature are expected to increase extinction risk for ectotherms, primarily through increased metabolic rates. Higher metabolic rates generate increased maintenance energy costs which are a major component of energy budgets. Organisms often employ plastic or evolutionary (e.g., local adaptation) mechanisms to optimize metabolic rate with respect to their environment. We examined relationships between temperature and standard metabolic rate across four populations of a widespread amphibian species to determine if populations vary in metabolic response and if their metabolic rates are plastic to seasonal thermal cues. Populations from warmer climates lowered metabolic rates when acclimating to summer temperatures as compared to spring temperatures. This may act

SUBMITTER: Munoz D 

PROVIDER: S-EPMC8809431 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature