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PLoS One

Title:		Influence of light availability and soil productivity on insect herbivory on bilberry (Vaccinium myrtillus L.) leaves following mammalian herbivory
Author(s):		Schrijvers-Gonlag M; Skarpe C; Andreassen HP;
Address:		"Campus Evenstad, Faculty of Applied Ecology, Agricultural Sciences and Biotechnology, Inland Norway University of Applied Sciences, Koppang, Norway"
Journal Title:		PLoS One
Year:		2020
Volume:		20200327
Issue:		3
Page Number:		e0230509 -
DOI:		10.1371/journal.pone.0230509
ISSN/ISBN:		1932-6203 (Electronic) 1932-6203 (Linking)
Abstract:		"Vegetative parts of bilberry (Vaccinium myrtillus) are important forage for many boreal forest mammal, bird and insect species. Plant palatability to insects is affected by concentration of nutrients and defense compounds in plants. We expected that palatability of bilberry leaves to insect herbivores is influenced by light availability and soil productivity (both affecting nitrogen concentration and constitutive carbon-based defense compound concentration) and herbivory by mammals (affecting nitrogen concentration and induced carbon-based defense compound concentration). We studied bilberry leaf herbivory under different light availability, soil productivity and mammalian herbivory pressure in small sampling units (1m x 1m) in boreal forest in Norway. We used generalized linear mixed models and generalized additive mixed models to model insect herbivory on bilberry leaves as a function of shade, soil productivity and mammalian herbivory. Observed insect herbivory on bilberry leaves increased with increasing shade levels. Predicted insect herbivory increased with increasing previous mammalian herbivory at high shade levels and this response was magnified at higher soil productivity levels. At low to intermediate shade levels, this response was only present under high soil productivity levels. Our results indicate that light availability is more important for variation in bilberry leaf palatability than soil nutrient conditions"
Keywords:		"Animals Herbivory/*physiology Insecta/*physiology Mammals/*physiology *Models, Biological Plant Leaves/*growth & development *Soil *Sunlight Vaccinium myrtillus/*growth & development;"
Notes:		"MedlineSchrijvers-Gonlag, Marcel Skarpe, Christina Andreassen, Harry Peter eng Research Support, Non-U.S. Gov't 2020/03/29 PLoS One. 2020 Mar 27; 15(3):e0230509. doi: 10.1371/journal.pone.0230509. eCollection 2020"