Journal
JOURNAL OF TROPICAL ECOLOGY
Volume 22, Issue -, Pages 123-136Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0266467405003019
Keywords
allometry; forest structure; functional groups; Panama; tree architecture
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This study provides a community-level analysis of how regeneration requirement and adult stature are related to tree allometry (diameter, height and crown size) throughout post-seedling ontogeny on Barro Colorado Island, Panama. Comparing 65 species, gap species are taller, have higher diameter growth rates and occupy more low-canopy sites (<= 10 m canopy height) than shade species at small diameters (<= 10 cm dbh). For trees > 10 cm dbh, diameter-height relationships and growth rates no longer differ between gap and shade species. but shade species have larger, particularly deeper, crowns than gap species. Species with tall adult stature have more slender stems with larger crowns compared with treelet and mid-canopy species starting at 5 cm dbh. From 10 to 40 cm dbh, diameter growth rate is also significantly greater for tall species. The consistent allometric differences between functional groups on a community level will, in part, determine vertical and horizontal stand structure.
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