Extended Data Figure 8: Carbon and oxygen isotope analysis of dental enamel.
From: Age and context of the oldest known hominin fossils from Flores
a, 13C and 18O values of Stegodon florensis and murine rodent tooth enamel. All but one of the δ13C ratios correspond to a C4 diet, indicating that the analysed Stegodon and murine rodents were predominantly grazers. The positive shift observed in 18O of the younger Stegodon samples (from the hominin-bearing Layer II) is more difficult to interpret with the limited data available, but could mean a distinct source of drinking water (i.e., run-off versus lacustrine) and/or warmer conditions. b, Benferroni corrected P values for a pairwise Mann–Whitney statistical analysis to test for similarity of δ13C between subsamples. c, Benferroni corrected P values for a pairwise Mann–Whitney statistical analysis to test for similarity of δ18O between subsamples; P values showing significant differences in median values are in bold.