Figure 1.

Soil Phosphorus predicts δ¹⁵N of gypsy ants and δ¹⁵N of leaf litter. Across a 500 ha. landscape, soil phosphorus stocks predicted mean δ¹⁵N of gypsy ants (panel A) and mean δ¹⁵N of the leaf litter, the resource base for gypsy ants (panel B).