Figures
Figure 1. Map of sampled nests within each field site. Nests
treated with an isotope tracer are labeled as “0” within each cluster.
Dark grey circles indicate that worker isotope values increased after
two weeks of treatment (i.e., \(\delta\)15N values of
workers were greater than 20‰), whereas light grey circles indicate that
isotope values did not change (mean natural abundance\(\delta\)15N values before tracer treatment: 5.00‰ ±
0.15‰). The social form according to Gp-9 results (P = polygyne;
M = monogyne), as well as within-nest relatedness are specified for each
mound.