NDLI: Herbivory on planted oak seedlings across a habitat edge created by timber harvest

Content Provider	Springer Nature Link
Author	Kellner, Kenneth F. Swihart, Robert K.
Copyright Year	2016
Abstract	Edge habitats create environmental gradients that affect plant community composition and herbivore behavior. Silvicultural disturbance creates edge habitat with direct (via changes in light) and indirect (via changes in herbivore behavior) consequences for the growth and survival of tree seedlings, and thus, the composition of the future forest stands. Herbivores, particularly ungulates, can be a major limiting factor in oak regeneration, and silvicultural disturbance may alter the abundance or behavior of herbivores following harvest. We measured the severity of herbivory on experimentally planted white (Quercus alba) and black oak (Quercus velutina) seedlings by white-tailed deer (Odocoileus virginianus) and eastern cottontail rabbits (Sylvilagus floridanus), as well as foliar damage from insects, across gradients created by clearcuts in a deciduous forest in Indiana, USA. Overall browse pressure on oaks was low in our study. Nonetheless, spatial variation in herbivory depended on herbivore taxa; herbivory by rabbits was highest inside harvest openings, whereas foliar damage by insects peaked in the forest. Intensity of deer herbivory was constant across the edge. In addition, we observed indirect interactions among herbivore species mediated by a seedling’s browsing history. Herbivore damage by deer was positively related to past browsing by rabbits, and foliar damage from insects was positively related to past browsing by both deer and rabbits. Increasing woody plant competition reduced herbivory on seedlings by both deer and rabbits. Given the lack of spatial variability in deer herbivory and low overall herbivory by rabbits, we suspect that interactions between timber harvesting and herbivory did not have a strong impact on oak seedlings at our study sites.
Starting Page	213
Ending Page	223
Page Count	11
File Format	PDF
ISSN	13850237
Journal	Plant Ecology
Volume Number	218
Issue Number	2
e-ISSN	15735052
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-11-11
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Oak Quercus Herbivory Insects White-tailed deer Eastern cottontail rabbit Ecology Plant Ecology Community & Population Ecology Terrestial Ecology Applied Ecology Biodiversity
Content Type	Text
Resource Type	Article
Subject	Ecology Plant Science

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