Wild flower seed predation byPterostichus madidus(Carabidae: Coleoptera)

Abstract

SummaryThe objective of the study was to investigate the ability ofPterostichus madidus, one of the most abundant carabid beetles in the United Kingdom, to consume wildflower seeds. The plant species chosen are commonly included in wildflower seed mixes sown to enhance the biodiversity of arable field margins, and hence any seed predation could potentially reduce successful seedling establishment. The study combined cafeteria style laboratory feeding experiments with predation studies in an established field margin.In laboratory studies thePterostichus madidusconsumed both unimbibed and imbibed seeds ofCentaurea scabiosa, Galium verum, Leucanthemum vulgareandPrimula veris. Seed consumption was still evident whenDrosophilapupae were also supplied, although there was significant preference for the pupae. Placement of seeds in the field showed high levels of seed consumption, although part of this was attributed to slugs. Carabid beetles may have a significant role as wild flower seed predators and thus may affect establishment of re‐seeded flower‐rich meadows.