Digest: Thermal selection creates a mosaic of trait evolution

Organismal responses to changing thermal conditions can manifest in adaptive changes to numerous traits, but as yet, a systematic understanding of which traits are more labile than others is lacking. A recent study by Zilio et al. (2026) demonstrates that physiological adaptation is sometimes more conserved than morphological and behavioral traits. Their study underscores the value of considering multiple trait types and comparative studies to understand phenotypic responses to novel selective pressures.