Differences in sapling architecture betweenFagus crenata andFagus japonica |
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Authors: | Yasuo Yamamura Atsushi Ishida Yoshimichi Hori |
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Institution: | (1) Department of Biology, Faculty of Science, Ibaraki University, 310 Mito, Japan;(2) Department of Biology, Faculty of Science, Tokyo Metropolitan University, 192-03 Hachiohji, Japan |
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Abstract: | The ecological significance of architectural patterns for saplings ofFagus crenata andFagus japonica co-occurring in a secondary oak forest were evaluated by comparing the size and shape of leaves, trunks and crowns.Fagus japonica saplings were different fromF. crenata saplings in some architectural properties: (i) the leaf area and specific leaf area were larger; (ii) the ratio of sapling
height to trunk length was lower, indicating greater leaning of the trunk; and (iii) the projection area of the crown was
larger and the leaf area index lower indicating less mutual shading of leaves. These architectural features indicated thatF. japonica saplings were more shade tolerant thanF. crenata andF. crenata saplings were superior toF. japonica for growth in height and could, therefore, utilize sunlight in the upper layer. An erect trunk inF. crenata and a leaning trunk inF. japonica may be important characteristics associated with the regenerations patterns of each species; regeneration from seedlings
under canopy gaps in the former and vegetative regeneration by sprouting in the latter. |
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Keywords: | Fagus crenata Fagus japonica leaf area index sapling architecture trunk leaning |
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