Isotopically distinct vegetation groupings (mean±SE) used to examine dietary niches of the two rodent species in Białowieża Forest.

Sample sizes differ from Table S1 in some cases because only samples containing seeds and fruits from trees and shrubs (vs buds and leaves) were used in the mixing model. *sample consisted of at least 5 individuals combined. aCalamagrostris arundinacea; Dactylis glomerata; Luzulla pilosa; Mycelis muralis; Veronica sp. bAegopodium podagraria; Ajuga reptans; Anemona nemorosa; Dentaria bulbifera; Ficaria verna; Oxalis acetosella; Stellaria holostea. cCardamine amara; Chrysosplenium alternifolium; Filipendula ulmaria; Iris pseudacorus; Phragmites communis; Rubus idaeus; Urtica dioica.