Wieners, Paul Christian, Bilger, Wolfgang and Gauslaa, Yngvar (2018) Carbon-based secondary compounds in the lichen Hypogymnia physodes deter detrivorous woodlice. Fungal Ecology, 31 . pp. 54-58. DOI 10.1016/j.funeco.2017.11.002.

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Abstract

Woodlice are not widely recognized as lichen-feeding invertebrates. We sought to discover whether the woodlouse, Porcellio scaber, could feed on the lichen Hypogymnia physodes and if the lichen carbon-based secondary compounds CBSCs would reduce grazing. We cut lichen thalli in two pieces, one was non-destructively rinsed in acetone to remove CBSCs; the other served as a control. Both pieces were fed to woodlice in a choice experiment. The CBSC concentration of individual thalli ranged from 3 to 19%. The woodlice grazed all pieces, but preferred the acetone-rinsed pieces, depending on the amount of CBSCs present in the non-extracted counterpart. The woodlice were not deterred from feeding on samples with CBSC concentrations ≤5%, which corresponded to natural contents in shade-adapted thalli. This suggested that P. scaber tolerates this amount of compounds at least in the short-term. In conclusion, P. scaber can feed on H. physodes, but CBSCs deter them from feeding.

Document Type:	Article
Keywords:	Carbon-based secondary compounds, Chemical defense, Grazing preference, Hypogymnia physodes, Isopods, Lichenivory, Lichens, Macrodetrivores, Porcellio scaber, Woodlouse
Research affiliation:	Kiel University Kiel University > Kiel Marine Science OceanRep > The Future Ocean - Cluster of Excellence
Refereed:	Yes
Open Access Journal?:	No
Publisher:	Elsevier
Projects:	Future Ocean
Date Deposited:	31 Jul 2018 10:16
Last Modified:	23 Sep 2019 20:17
URI:	https://oceanrep.geomar.de/id/eprint/43846

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