Occurrence and diversity of fungal entomopathogens in soils of low and high Arctic Greenland

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• 作者：Nicolai V. Meyling (1) nvm@life.ku.dk
  Niels M. Schmidt (2)
  J?rgen Eilenberg (1)
• 关键词：Insect bait method – Beauveria pseudobassiana – Isaria farinosa – Isaria fumosorosea – Tolypocladium inflatum
• 刊名：Polar Biology
• 出版年：2012
• 出版时间：September 2012
• 年：2012
• 卷：35
• 期：9
• 页码：1439-1445
• 全文大小：318.9 KB
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• 作者单位：1. Department of Agriculture and Ecology, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark2. Department of Bioscience, Aarhus University, Frederiksborgvej 399, 4000 Roskilde, Denmark
• ISSN：1432-2056

文摘

Knowledge of the occurrence, distribution and diversity of pathogens of insects and arachnids (entomopathogens) in the Arctic is very limited. Climate change is expected to affect Arctic terrestrial arthropod communities and therefore also host–pathogen interactions, given that entomopathogens are present. We conducted a survey of fungal entomopathogens in soil samples collected at four localities in Greenland; two at low Arctic sites (Ritenbenk and Disko Island) and two at sites in the high Arctic (Zackenberg and Danmarkshavn). Fungi were isolated from soil samples using larvae of the insect species Galleria mellonella (Lepidoptera) and Tenebrio molitor (Coleoptera) as baits providing evidence that the fungal isolates were indeed entomopathogenic. Five fungal species (Ascomycota; Hypocreales) were found: Isaria fumosorosea Wize, Isaria farinosa (Holmsk.) Fr., Beauveria bassiana (Bals.) Vuill., Beauveria pseudobassiana Rehner and Humber and Tolypocladium inflatum W. Gams (syn. = T. niveum). I. farinosa was found at all four localities, while I. fumosorosea was detected in single samples at each of three localities including both high Arctic sites. Only the locality on Disko Island revealed B. bassiana, whereas B. pseudobassiana was isolated at the three other sites. T. inflatum was only found on Disko Island and only isolated with T. molitor as a bait insect. The results document that fungal entomopathogens are widely distributed in the soil environment in Greenland. Entomopathogens should therefore be included in future studies of arthropod ecology in the Arctic.