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Title: Does the shelterwood method to regenerate oak forests affect acorn production and predation?
Author: Bellocq, M.I.; Jones, C.; Dey, D.C.; Turgeon, J.J.
Source: Forest Ecology and Management. 205: 311-323.
Description: The shelterwood system is one of the primary methods currently used to encourage regeneration of oak forests; yet, little is known about its influence on acorn production and predation. We compared acorn production, and predation by insects and mammals in stands of red oak (Quercus rubra L.) that were regenerated by the shelterwood method (50% canopy removal) to that of uncut (control) stands in the first year of production after the harvest treatment. In each plot, we measured stand and tree characteristics and estimated acorn production by using both acorn traps and a visual crown survey to place trees into productivity classes. Acorns collected in traps were examined to record the external and internal conditions, percentage of cotyledon damaged and the presence of insects. Exclusion cages were used to quantify acorn predation by mammals in harvested and control plots. Oaks in the shelterwood plots produced more acorns than oaks in uncut stands if the acorn crop was rated by the crown survey method, but not when production was measured with acorn traps. We found no evidence that the shelterwood method influenced acorn predation by insects or mammals.
Keywords: Quercus rubra, regeneration by shelterwood system, seed production, pre-dispersal seed predation, post-dispersal seed predation
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Bellocq, M.I.; Jones, C.; Dey, D.C.; Turgeon, J.J. 2005. Does the shelterwood method to regenerate oak forests affect acorn production and predation. Forest Ecology and Management. 205: 311-323.
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