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Ecology of mast-fruiting in three species of North American deciduous oaks

TitleEcology of mast-fruiting in three species of North American deciduous oaks
Publication TypeJournal Article
Year of Publication1993
AuthorsSork, VL, Bramble, J, Sexton, O
JournalEcology
Page range528-541
Abstract

An 8-yr study. Red and white oak showed a greater degree of mast-fruiting than did black oak. Principal components and multiple-regression analysis were used to describe the relationship between weather variables and acorn production. Spring temperature (positive effect) and summer drought (negative effect) were most important. Past acorn production had a major impact on current crop, with each species showing a different pattern; up to 4 year time lag. There may be inherent 2, 3, and 4-year cycles, modified by weather and prior reproduction. Late spring frost was one of 3 important variables in the first principal component, that accounted for 30.3% of the total variation in black and red oak acorn production. There was a significant effect of frost damage 2 years previously on acorn production.

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