Light-gap disturbances, recruitment limitation, and tree diversity in a neotropical forest
Light-gap disturbances, recruitment limitation, and tree diversity in a neotropical forest
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DOI：
10.1126/science.283.5401.554
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发表时间：
1999-01-22
期刊：
影响因子：
56.9
通讯作者：
de Lao, SL
中科院分区：
文献类型：
--
作者：
Hubbell, SP;Foster, RB;de Lao, SL
在物种丰富的热带森林中，光隙干扰被认为在维持树木多样性方面发挥了重要作用。这一假设在巴拿马热带森林的1200多个空隙中进行了长达13年的测试。盖帽增加了成苗率和苗木密度，但这种影响是非特异性的，而且是广谱的，林隙和非林冠对照地的单茎物种丰富度是相同的。林隙干扰区的时空变化不能解释物种丰富度的变化。即使是先锋树种，林隙的物种组成也是不可预测的。强烈的补给限制似乎将林隙干扰机制与热带森林中树木多样性的控制脱钩。
Light gap disturbances have been postulated to play a major role in maintaining tree diversity in species-rich tropical forests. This hypothesis was tested in more than 1200 gaps in a tropical forest in Panama over a 13-year period. Caps increased seedling establishment and sapling densities, but this effect was nonspecific and broad-spectrum, and species richness per stem was identical in gaps and in nongap control sites. Spatial and temporal variation in the gap disturbance regime did not explain variation in species richness. The species composition of gaps was unpredictable even for pioneer tree species. Strong recruitment limitation appears to decouple the gap disturbance regime from control of tree diversity in this tropical forest.