Table 1: Sample sizes and average values for each of the 8 regions for the LeIR and SrIR data.

RegionNo. ObsAvg. IR of seedAvg.
𝛿 13C 𝛿 15N 𝛿 18O 𝛿 2H 87/86Sr

US01 (CA)7−26.265.9723.27−121.890.710
US02 (AZ)4−27.158.0424.20−157.900.711
US03 (UT)7−28.577.5019.11−183.420.709
US04 (TX)8−26.634.3422.52−143.750.711
BRAZ0115−27.078.4721.88−136.450.715
BRAZ027−27.177.7422.55−136.170.726
CHIN9−27.625.9817.72−171.660.711
INDI11−27.858.2223.72−138.340.715