Fig. 3
From: Savanna ecosystems and mammalian adaptations in Mid-Miocene Northern China
Plot of δ13Cenamel values of various mammals across different regions from 18–5 Ma. The green and yellow curves represent the average and maximum enamel δ13C values for C3 diet, respectively, adjusted for past changes in the δ13C of atmospheric CO2 (Tipple et al., 2010). Data source: Sandelzhausen (Tütken et al. 2009); Steinheim (Tütken et al., 2006); Madrid Basin (Domingo et al., 2012); Oregon (Drewicz, 2018); Nebraska (Nguy and Secord, 2022); Linxia Basin (Wang and Deng, 2005); Qaidam Basin (Zhang et al., 2012); Tunggur region (Zhang et al., 2009); Baode and Lantian regions (Passey et al., 2009); others, this study.
