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Reproductive Phenology of the Oak Family (Fagaceae) in the Lowland Rain Forests of Borneo

Robert B. Kaul, Ernst C. Abbe and Lucy B. Abbe
Biotropica
Vol. 18, No. 1 (Mar., 1986), pp. 51-55
DOI: 10.2307/2388362
Stable URL: http://www.jstor.org/stable/2388362
Page Count: 5
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Reproductive Phenology of the Oak Family (Fagaceae) in the Lowland Rain Forests of Borneo
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Abstract

Seventeen individual trees of 12 species of Castanopsis. Lithocarpus, and Quercus were studied at 2-4 week intervals for most of a year, and reproductive phenology of numerous other individuals and species was recorded over a 3-year period. Inflorescence primordia were macroscopically visible near the end of the wetter season and anthesis of all flushes occurred in the drier season. There was general synchrony of reproduction among reproducing individuals, but a few trees were sterile throughout the observation period. Some had multiple reproductive flushes at 3-5 week intervals. Anthesis in the drier season by Castanopsis and Lithocarpus, which are entomophilous, maximizes pollination because that is the season of insect population peaks. Quercus is anemophilous and therefore is unaffected by insect population cycles.

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