Carbon and nitrogen assimilation in the Bering Sea clams Nuculana radiata and Macoma moesta

► Bering Sea benthic clam response to changing sea ice algal production is unknown. ► Stable isotope analysis could be a useful tool in tracing ice algal in feeding clams. ► Isotopically labeled algae (C and N) assimilated into various clam samples. ► Assimilation rates and response differed among two species and experimental approach. ► Climate impacts on ice algal production could influence clam population dynamics.