Hypoxia traits imprinted in otolith δ¹³C from individual to global scales.

ABSTRACT: Hypoxia tolerance and its variation with temperature, activity, and body mass, are critical ecophysiological traits through which climate impacts marine ectotherms. To date, experimental determination of these traits is limited to a small subset of modern species. We leverage the close coupling of carbon and oxygen in animal metabolism to mechanistically relate these traits to the carbon isotopes in fish otoliths (δ¹³C_oto). The model reproduces the major empirical patterns in δ¹³C_oto at individual to global scales. The weak dependence on body size and strong, non-linear, dependence on temperature reflect the same balance between metabolism and ventilatory gas exchange that underlies organisms' hypoxia tolerance. The global relationship between te

SUBMITTER: Howard EM 

PROVIDER: S-EPMC11696016 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature