Spatial patterns in the distribution of tropical tree species
Spatial patterns in the distribution of tropical tree species
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DOI：
10.1126/science.288.5470.1414
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发表时间：
2000-05-26
期刊：
影响因子：
56.9
通讯作者：
Yamakura, T
中科院分区：
文献类型：
--
作者：
Condit, R;Ashton, PS;Yamakura, T
现已在热带森林的六个不同地点完成了25至52公顷大面积树木普查图的全面绘制，包括两个大陆上的干燥落叶林到潮湿万年青林。这些地块的主要目标之一是评估热带树木种群的空间格局。在这里的聚集度分布的1768个树种进行检查的基础上，在每棵树周围的圆形街区同种树木的平均密度。当所有大于1厘米的茎直径的个体都包括在内时，几乎每个物种都比随机分布更聚集。仅考虑较大的树木（直径大于或等于10厘米），这种模式仍然存在，大多数物种的聚集性大于随机性。稀有种比常见种聚集性更强。所有六个森林在这些结果的所有细节上都非常相似。
Fully mapped tree census plots of large area, 25 to 52 hectares, have now been completed at six different sites in tropical forests, including dry deciduous to wet evergreen forest on two continents. One of the main goals of these plots has been to evaluate spatial patterns in tropical tree populations. Here the degree of aggregation in the distribution of 1768 tree species is examined based on the average density of conspecific trees in circular neighborhoods around each tree. When all individuals larger than 1 centimeter in stem diameter were included, nearly every species was more aggregated than a random distribution. Considering only larger trees (greater than or equal to 10 centimeters in diameter), the pattern persisted, with most species being more aggregated than random. Rare species were more aggregated than common species. All six forests were very similar in all the particulars of these results.