Effects of simulated winter browsing on mountain birch foliar chemistry and on the performance of insect herbivores
Article Abstract:
A clipping experiment with mature mountain birch trees is conducted and the effects of clipping on birch growth, leaf chemistry and toughness, as well as on the performance of insect herbivores are measured. Leaves grew larger and heavier per unit area in the clipped ramets and had a higher content of proteins than leaves in the control trees.
Publication Name: Oikos
Subject: Environmental issues
ISSN: 0030-1299
Year: 2005
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Effects of host shading on consumption and growth of the geometrid Epirrita autumnata: interactive roles of water, primary and secondary compounds
Article Abstract:
The experimental shading of individual branches or whole canopies in mountain birch on foliar chemistry and on the growth and consumption of a geometrid, Epirrita autumnata, is analyzed. The results reveal that effects of putatively defensive leaf traits on insect consumption and growth interact with nutritive leaf traits.
Publication Name: Oikos
Subject: Environmental issues
ISSN: 0030-1299
Year: 2003
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Influence of adult and egg predation on reproductive success of Epirrita autumnata (Lepidoptera: Geometridae)
Article Abstract:
The effects of predation and oviposition activity on reproductive success of a late-season moth, Epirrita autumnata, are investigated. The reproductive success of non-outbreaking Epirrita autumnata is decreased by 60-85 percent and egg mortality is decreased by 20-40 percent due to adult predation.
Publication Name: Oikos
Subject: Environmental issues
ISSN: 0030-1299
Year: 2003
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