Evaluation of leaf display of evergreen broadleaved tree species and deciduous tree species in warm temperate conifer plantations

Yoshiyuki Miyazawa, Kihachiro Kikuzawa, Kyoichi Otsuki

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Abstract

We investigated the sapling leaf display in the shade among trees of various leaf lifespans co-occurring under the canopy of a warm-temperate conifer plantation. We measured leaf-area ratio (aLAR) and morphological traits of saplings of evergreen broadleaved tree species and a deciduous tree species. Although we found large interspecific and intraspecific differences in aLAR even among saplings of similar size in the homogeneous light environment, we did not find a consistent trend in aLAR with leaf lifespan among the species. While deciduous trees annually produced a large leaf area, some evergreen broadleaved trees retained their leaves across years and had aLAR values as high as those of deciduous trees. Among leaf-level, shoot-level, and individual-level morphological traits, aLAR was positively correlated with current-year shoots mass per aboveground biomass in deciduous trees, and with the area of old leaves per aboveground mass in evergreen broadleaved trees. Thus, tree-to-tree variation in the degrees of annual shoot production and the accumulation of old leaves were responsible for the interspecific and intraspecific variations in aLAR.

Original languageEnglish
Pages (from-to)59-67
Number of pages9
JournalJournal of Forest Research
Volume13
Issue number1
DOIs
Publication statusPublished - Feb 1 2008

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All Science Journal Classification (ASJC) codes

  • Forestry

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