Benthic foraminiferal δ13C and accumulation rates of organic carbon: Uvigerina Peregrina group and Cibicidoides Wuellerstorfi

Abstract

The glacial to interglacial δ13C records of the benthic foraminifera Cibicidoides wuellerstorfi and the Uvigerina peregrina group from deep‐sea cores cannot be adjusted by a generally valid constant. The δ13C values of the U. peregrina group largely correlate with the accumulation rates of organic carbon, suggesting a local "habitat effect"; those of C. wuellerstorfi vary independently with respect to the carbon flux and record fluctuations in the δ13C of the ambient bottom water isotopic composition.