Forest tree growth and dynamics at La Selva, Costa Rica (1969-1982)
Forest tree growth and dynamics at La Selva, Costa Rica (1969-1982)
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哥斯达黎加拉塞尔瓦的林木生长和动态（1969-1982）
DOI：
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发表时间：
1987
影响因子：
1.4
通讯作者：
M. Lieberman
中科院分区：
文献类型：
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作者：
D. Lieberman;M. Lieberman
1969年，在哥斯达黎加的拉塞尔瓦生物站的原始热带湿林中建立了总面积为12.4公顷的永久样地，对所有胸高直径≥10 cm的树干进行标记和测量。1982年，这些地块再次进行普查，所有活树重新测量。根据对数死亡率模型，13年以上的死亡率为23.2%，或每年2.03%。这表明半衰期约为34年。直径≥10 cm的树木死亡率与大小等级无关。招募等于死亡。采用生长模拟方法，对44个树种13年生直径生长量的生长曲线和年龄-大小关系进行了预测。林下树木生长缓慢且一致，寿命短;亚树冠树木也生长缓慢，但寿命较长;耐荫树冠树木表现出可变且通常快速生长，寿命长;而不耐荫树冠树木生长迅速，表现出很少的变化，寿命短。在我们的样本中，最长的估算寿命约为440年（从10 cm直径到最大直径的年数）;最短的寿命约为50年。
ABSTRACT Permanent plots totalling 12.4 hectares were established in 1969 in primary tropical wet forest at La Selva Biological Station, Costa Rica; all stems ≥10 cm diameter at breast height were tagged and measured. In 1982, the plots were again censused, and all live trees re-measured. Mortality over 13 years was 23.2%, or 2.03% per year based on a logarithmic mortality model. This suggests a stand half-life of around 34 years. Mortality was independent of size class in trees ≥10 cm diameter. Recruitment was equal to mortality. Tree growth curves and age-size relationships for 44 species were projected from 13-year diameter increments using a growth simulation procedure. Understorey trees grow slowly and consistently, and have short life spans; subcanopy trees also grow slowly, but live longer; shade-tolerant canopy trees show variable and often rapid growth and are long-lived; and shade-intolerant canopy trees grow rapidly, show little variation, and have short life spans. The longest imputed life span in our sample was around 440 years (years from 10 cm diameter to the maximum diameter); the shortest life span was around 50 years.