The botanical magazine = Shokubutsu-gaku-zasshi

, Volume 100, Issue 3, pp 223–241

Age structure and regeneration of old growthCryptomeria japonica forests on Yakushima Island

  • Eizi Suzuki
  • Jun Tsukahara

DOI: 10.1007/BF02492832

Cite this article as:
Suzuki, E. & Tsukahara, J. Bot. Mag. Tokyo (1987) 100: 223. doi:10.1007/BF02492832


The regeneration process ofCryptomeria japonica forests was studied from surveys of age and initial growth of the coniferous stumps in plots of 2.66 ha in total on Yakushima Island, south Japan. The conifers germinated during particular regeneration periods each of which was shorter than 100 years. The periods repeated themselves several times in each plot, and conifers of each period formed patches. Both tree cutting and natural gap formation of the canopies initiated the regenerations. The saplings that were thought to have germinated before the initiation of the regeneration grew slowly. After the initiation, the saplings that germinated earlier grew more quickly. For the three codominant conifers:Cryptomeria japonica, Tsuga sieboldii, andAbies firma, the shade tolerance was inversely correlated with maximum age. Even the most shade-tolerantA. firma was a gap-dependent species in regeneration periods, and there were no species differences in the colonizing times during the regeneration period. Shade-intolerant long-lived species and shade-tolerant short-lived species coexisted as climax species, not as alternate species in the sere of succession.

Key words

Age structureCryptomeria japonicaForest regenerationTemperate coniferous forestYakushima Island



diameter at breast height

Copyright information

© The Botanical Society of Japan 1987

Authors and Affiliations

  • Eizi Suzuki
    • 1
  • Jun Tsukahara
    • 1
  1. 1.Biological Institute, College of Liberal ArtsKagoshima UniversityKagoshima
  2. 2.Hyogo Prefectural Park AssociationAkashi