Strategies of Tree Occupation at a Local Scale in terra firme Forests in the Colombian Amazon
Strategies of Tree Occupation at a Local Scale in terra firme Forests in the Colombian Amazon
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哥伦比亚亚马逊地区陆地森林局部规模的树木占用策略
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
Alberto Posada
中科院分区：
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作者：
Á. Duque;J. Cavelier;Alberto Posada
本研究的目的是确定在物种丰富度和树木和藤本植物物种组合的三个相邻的陆地firme森林中里奥卡克塔，哥伦比亚的差异。在一条沿着长10 × 2160 m的纵向样带上，对胸径大于等于10 cm的树木和藤本植物进行了植被调查。物种被分为本地丰富或本地稀有。使用2 × 3列联表将丰富物种定义为“通才”（在所有环境中）、“中间”（在两种环境中）和“专家”（仅在一种环境中）。有146种（39%）被归类为本地丰富，231种（61%）被归类为本地稀有。在丰富的物种中，70%是通才，25%是专家，5%是中级。虽然有一个显着的数量稀少的物种，这些物种有足够的数量来统计测试的空间分布，结果表明，许多物种是通才和β多样性在当地规模（2.16公顷）是低的。应分析更大地理区域的更大数据集，以确定亚马逊森林物种更替的程度。
The goal of this study was to define differences in species richness and tree and liana species assemblages of three adjacent terra firme forests in the middle Rio Caquetá, Colombia. A vegetation survey of trees and lianas equal to or more than 10 cm diameter at breast height (DBH) was carried out along a single longitudinal transect (10 × 2160 m) passing through a low plain terrace, a high dissected terrace, and a high plain terrace. Species were classified as either locally abundant or locally rare. Abundant species were defined as “generalists” (in all environments), “intermediate” (in two environments), and “specialists” (in only one environment) using a 2 × 3 contingency table. There were 146 (39%) species classified as locally abundant and 231 (61%) as locally rare. Among the abundant species, 70 percent were generalists, 25 percent were specialists, and 5 percent were intermediate. Although there was a significant number of rare species, for those species with sufficient numbers to statistically test spatial distribution, the results suggest that many species are generalists and that beta diversity at the local scale (2.16 ha) is low. Larger data sets over larger geographical areas should be analyzed to determine the degree of species turnover in Amazonian forests.