Community dynamics of Ogawa Forest Reserve, a species rich deciduous forest, central Japan

摘要: Forest community dynamics were studied for 4 years in a 6 ha permanent plot of species rich, old-growth, temperate deciduous forest Ogawa Reserve, central Japan. The gap formation rate, recruitment, mortality, gain and loss rate basal area during 42 m2 ha−1 yr−1, 1.74% 1.19% 1.12% yr−1 0.88% respectively. turnover time calculated from them ranged 58 to 240 years. Both the mortality factors size dependent; trees middle class had smallest proportion killed by disturbances increased with size. Gap creations concentrated particular year, suggesting large heterogeneity time. Spatial distribution recruited biassed old gaps (older than years), especially that Bell-shaped dbh (shade intolerant) strongly associated gaps. Recruitment tree stems area, thus larger variability this forest, L-shaped seemed going increase importance future if present trend continues be held. population is positively correlated maximum species, indicating slow change sized species.