Received: 5 June 2018 | Revised: 28 August 2018 | Accepted: 29 August 2018 DOI: 10.1002/ece3.4559 ORIGINAL RESEARCH Table for five, please: Dietary partitioning in boreal bats Eero J. Vesterinen1,2* | Anna I. E. Puisto1* | Anna S. Blomberg1,3 | Thomas M. Lilley4,5 1Biodiversity Unit, University of Turku, Turku, Finland Abstract 2Department of Agricultural Differences in diet can explain resource partitioning in apparently similar, sympatric Sciences, University of Helsinki, Helsinki, species. Here, we analyzed 1,252 fecal droppings from five species (Eptesicus nilsso‐ Finland nii, Myotis brandtii, M. daubentonii, M. mystacinus, and Plecotus auritus) to reveal their 3Department of Biology, University of Turku, Turku, Finland dietary niches using fecal DNA metabarcoding. We identified nearly 550 prey spe‐ 4Institute of Integrative Biology, University cies in 13 arthropod orders. Two main orders (Diptera and Lepidoptera) formed the of Liverpool, Liverpool, UK majority of the diet for all species, constituting roughly 80%–90% of the diet. All five 5Finnish Museum of Natural History, University of Helsinki, Helsinki, species had different dietary assemblages. We also found significant differences in Finland the size of prey species between the bat species. Our results on diet composition Correspondence remain mostly unchanged when using either read counts as a proxy for quantitative Eero J. Vesterinen, Biodiversity Unit, diet or presence–absence data, indicating a strong biological pattern. We conclude University of Turku, Turku, Finland. Email:
[email protected] that although bats share major components in their ecology (nocturnal life style, in‐ and sectivory, and echolocation), species differ in feeding behavior, suggesting bats may Thomas M. Lilley, Institute of Integrative Biology, University of Liverpool, Liverpool, have distinctive evolutionary strategies.