The botanical magazine = Shokubutsu-gaku-zasshi

, Volume 97, Issue 4, pp 447–455 | Cite as

Litter-fall and reproductive seasonalities in aLeucaena leucocephala forest at Chichijima, Ogasawara (Bonin) Islands

  • Makoto Kimura
  • Masaki Funakoshi
  • Shinpei Sudo
  • Wakio Kimura
  • Yasuo Yamamura
  • Satoru Honma
Article

Abstract

Seasonal changes in litter components were measured in a closedLeucaena leucocephala forest stand in Chichijima, Ogasawara (Bonin) Islands, situated in a wet subtropical climate. The phytomass of the stand was estimated as 5.62, 1.47 and 0.448 kg d.w. m−2 for stems, branches and leaves, respectively.

Litter from the canopy was collected semimonthly by ten 0.5 m2 traps. Leaf-litter production rate was low in spring, medium in summer and autumn, and peaked in mid-winter. Annual production of leaf-litter was 498 g d.w. m−2. Annual turnover rate of canopy leaves was 1.1. Flower-litter showed biannual production with peaks in spring and autumn, and the former peak largely exceeded the latter one in quantity. Seed maturation needed about 3 months. Annual production of reproductive organs was 89.2, 89.4, 19.1 and 99.4 g d.w. m−2 for flowers, mature seeds, immature ones and pods, respectively. Number, of mature seeds disseminated exceeded 2,500 m−2. Annual production of branch- and bark-litter was 345 g d.w.m−2.

Annual amount of plant litter from the canopy was as large as 1,150 g d.w. m−2, showing higher productivity and higher rate of matter turnover in this forest than in temperate forests.

Key words

Leucaena leucocephala Litter fall Reproductive seasonality Seed production Subtropical forest 

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Copyright information

© The Botanical Society of Japan 1984

Authors and Affiliations

  • Makoto Kimura
    • 1
  • Masaki Funakoshi
    • 2
  • Shinpei Sudo
    • 3
  • Wakio Kimura
    • 1
  • Yasuo Yamamura
    • 1
  • Satoru Honma
    • 1
  1. 1.Department of Biology, Faculty of ScienceTokyo Metropolitan UniversityTokyo
  2. 2.Department of Biology, Faculty of ScienceShinshu UniversityMatsumoto
  3. 3.Second Department of PhysiologyKanazawa Medical UniversityIshikawa

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