3.2 | Patterns in stable isotope values
There was annual variation in δ 13C values (Figure 2A), and this variation was best described by a log-linear relationship with bilberry production and the number of moose calves observed in the year in which hair was grown (Table 1). Higherδ 13C values are associated with moose and ants, median values are associated with crowberry and lingonberry, and bilberry had the lowest δ 13C values.