Stable Isotope Analysis Supports Omnivory in Bank Voles in Apple Orchards

With only periodic and incomplete studies of its diet over time, all with differing methods conclusions, the degree omnivory in bank vole (Clethrionomys glareolus) is not fully clear. We assessed trophic niche species using isotopic (?15N ?13C) compositions from hair samples analysed how C. glareolus shares space herbivores, granivores insectivores living syntopically. According to numbers trapped, was fourth most numerous apple orchards that we investigated, accounting for 14.4% trapped small mammals a relative abundance 1.12 individuals per 100 trap nights. The average values both ?15N ?13C differed other groups, neighbouring habitats (6.55–6.95‰) being closest insectivores. Intraspecific differences (depending on age, gender reproductive status) were expressed, while correlations between body mass, condition index consistent. In comparison basal resources, signatures invertebrates seeds. same different habitats. This may be an indication ecological plasticity within species, allowing inclusion/success multi-species mammal communities.