Productivity and mineral cycling in an oak coppice forest 1. Structure and phytomass of the forest |
| |
Authors: | Makoto Kimura Masaki Funakoshi Shinpei Sudo Takehiro Masuzawa Toshie Nakamura Kozue Matsuda |
| |
Affiliation: | (1) Department of Biology, Faculty of Science, Tokyo Metropolitan University, Setagaya, 158 Tokyo;(2) Present address: Department of Biology, Faculty of Science, Shinshu University, 390 Matsumoto;(3) Present address: Department of Physiology, Kanazawa University School of Medicine, Uchinada, Kahoku-Gun, 920-02 Ishikawa;(4) Present address: Department of Biology, Faculty of Science, Shizuoka University, 420 Shizuoka |
| |
Abstract: | Ecological studies were made on the structure and phytomass of the secondary coppice forest near Tokyo, which was dominated by a deciduous oak,Quercus serrata Thunb. Average height of dominant trees was about 10 m. The shoot density at the beginning of the study was 4,600 ha−1 of which 89.5% belonged toQ. serrata. During the subsequent two growing seasons 8.3% of shoots, mainly small ones, died. All the tree shoots in a 10 m×10 m quadrat were cut and most of the underground parts were dug out. The phytomass calculated by the allometric relations of the dry weight of each plant organ to the square of DBH (D 2) agreed fairly well with the values directly weighed. The average phytomass of the overstory trees was 906 kg a−1. The leaf area index (LAI) of the canopy was 3.85. Phytomass of the undergrowth, mainly a dwarf bamboo,Pleioblastus chino Makino, was 91.8 kg a−1 with LAI of 3.46. The dead phytomass in the stand was 177 kg a−1, so the phytomass alive and dead amounted to 1,170 kg a−1. Heavy self-thinning of the coppice forest is discussed in relation to the rapid development of the log-normal distribution of tree sizes and to the large allometric constants for leaf and branch weight toD 2. |
| |
Keywords: | Allometric constant Coppice Forest phytomass secondary forest Self-thinning Quercus serrata |
本文献已被 SpringerLink 等数据库收录! |
|