Quantitative mismatch between empirical temperature-size rule slopes and predictions based on oxygen limitation.

ABSTRACT: In ectotherms, adult body size commonly declines with increasing environmental temperature, a pattern known as the temperature-size rule. One influential hypothesis explaining this observation is that the challenge of obtaining sufficient oxygen to support metabolism becomes greater with increasing body size, and more so at high temperatures. Yet, previous models based on this hypothesis do not account for phenotypic plasticity in the physiology of organisms that counteracts oxygen limitation at high temperature. Here, we model the predicted strength of the temperature-size response using estimates of how both the oxygen supply and demand is affected by temperature when allowing for phenotypic plasticity in the aquatic ectotherm Daphnia magna. Our predictions remain highly inconsistent wit

SUBMITTER: Einum S 

PROVIDER: S-EPMC8654919 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature