Fungal symbionts of the polyphagous and Kuroshio shot hole borers (Coleoptera: Scolytinae, Euwallacea spp.) in California can support both ambrosia beetle systems on artificial media

摘要: The specificity of ambrosia beetle-fungus relationships is unknown for the vast majority symbioses, yet has important implications success these beetles and fungi in their surrounding environments. polyphagous shot hole borer Kuroshio (Euwallacea spp.) are invasive that exist sympatrically California, together with cause Fusarium Dieback a variety hosts. potential two beetle species to exchange symbionts unknown, but ecological consequences. Here we perform symbiont switching experiments, determine if borers can survive reproduce on each other’s symbiotic range California. Aposymbiotic foundresses were assessed ability beetles’ primary (Fusarium auxiliary (Graphium spp., Paracremonium pembeum) fungal symbionts, grown sawdust-based artificial media. Offspring collected confirm which present different sexes life stages. Additionally, aposymbiotic non-aposymbiotic non-ambrosial was tested. We found reproduction maximized regardless whether paired its own or congener’s, indicating there natural populations beetles. addition treatments containing spp. had no effect overall offspring production, females fed solely produced significantly fewer offspring. Females than when reared Fusarium, this especially pronounced females. From our putative roles versus as well development environment, discussed.