Community dynamics of Ogawa Forest Reserve, a species rich deciduous forest, central Japan
Community dynamics of Ogawa Forest Reserve, a species rich deciduous forest, central Japan
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日本中部物种丰富的落叶林小川森林保护区的群落动态
DOI：
10.1007/bf00047696
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
K. Niiyama
中科院分区：
文献类型：
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作者：
T. Nakashizuka;S. Iida;H. Tanaka;M. Shibata;S. Abe;T. Masaki;K. Niiyama
在日本中部小川森林保护区的一个6公顷的物种丰富的，古老的，温带落叶林的永久性地块，森林群落动态进行了4年的研究。差距形成率、林隙补充率、林隙死亡率、林隙增加率和林隙损失率分别为42 m2 ha-1 yr-1、1.74%yr-1、1.19%yr-1、1.12%yr-1和0.88%yr-1。根据这些数据计算的周转时间从58年到240年不等。死亡率和死亡率因子都是大小相关的，中等大小级的树木死亡率最低，干扰致死的树木比例随着大小而增加。间隙的创造集中在特定的一年，这表明在时间上存在很大的异质性。补充木的空间分布偏向于老林隙（大于4年生），尤其是胸径呈钟形分布（不耐荫）的树种，其空间分布与林隙密切相关。树干的补充量和断面积的损失比树干和林分的死亡率具有更大的变异性，如果目前的趋势继续下去，L形胸径分布的物种在未来的重要性似乎会增加。种群周转时间与树种最大胸径呈正相关，说明大径树种种群变化缓慢。
Forest community dynamics were studied for 4 years in a 6 ha permanent plot of species rich, old-growth, temperate deciduous forest in Ogawa Forest Reserve, central Japan. The gap formation rate, recruitment, mortality, gain and loss rate in basal area during 4 years were 42 m2 ha−1yr−1, 1.74% yr−1, 1.19% yr−1, 1.12% yr−1and 0.88% yr−1, respectively. The turnover time calculated from them ranged from 58 to 240 years. Both the mortality and mortality factors were size dependent; trees in middle size class had smallest mortality, and the proportion of the trees killed by disturbances increased with size. Gap creations were concentrated in a particular year, suggesting a large heterogeneity in time. Spatial distribution of recruited trees were biassed to the old gaps (older than 4 years), especially that of the species with Bell-shaped dbh distribution (shade intolerant) strongly associated with the gaps. Recruitment in tree stems and the loss of basal area, thus had the larger variability than mortality of stems and this forest, and the species with L-shaped dbh distribution seemed to going to increase the importance in the future if the present trend continues to be held. The turnover time of population is positively correlated with the maximum dbh size of the species, indicating the slow change of the population of large sized species.