森林生態系における材器官と蓄積枯死材のターンオーバー直径の度数分布の変化にもとづく推定 : 林床における枯死材の分解速度に関する研究 IV

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YONEDA, Tsuyoshi (Dep. Biol., Fac. Sci., Osaka City Univ., Osaka). 1982. Turnover of live and dead woody organs in forest ecosystems-an assessment based on the changes in the frequency distribution of their diameter (Studies on the rate of decay of wood litter on the forest floor. IV). Jap. J. Ecol., 32 : 333-346. The frequencyφ (d) distribution of wood diameter (d) was determined or estimated in several forest stands of Japan and Malaysia for three different stages : 1) live woody organs in a stand [φ_1 (d)], 2) freshly fallen wood litter [φ_2 (d)], and 3) wood litter accumulating on the forest floor to decay [φ_3 (d)]. The regression of logφ on log d proved to be approximately linear in all the three stages, but the gradient of regression lines differed among the stages. The ratio of φ_1 (d) to φ_2 (d) represented the mean turnover time of live woody organs and was proportional to d^<0.9>. The mean turnover time of accumulating wood litter was similarly given by φ_3 (d)/φ_2 (d), which was proportional to d^<0.2>. A new formulation was developed for estimating the amounts of falling and accumulating wood litter from their maximum diameter to show good applicability to the data from other sources. The 'breakability' of a live branch was found to be proportional to its cross-section area or d^2.
日本生態学会の論文
1982-09-30