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首页> 外文期刊>International Journal of Forestry Research >A Structure Analysis for Ecological Management of Moist Tropical Forests
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A Structure Analysis for Ecological Management of Moist Tropical Forests

机译：潮湿热带森林生态管理的结构分析

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Human interventions alter stand structure, species composition, and regeneration capacity of the forest. There is no enough information on how different management systems affect the forest structure. The main objective of this study was to analyze the differences on stand structure and species composition caused by different logging intensities. The study was conducted in a lowland evergreen moist forest of 22 000 ha in Cameroon. The forest was subdivided into three forest types with different human impacts:2-Logged,1-Logged, andUnlogged. The diameter corresponding to mean basal area of stems of2-Logged(31.8 cm,N=369) was almost equal to that ofUnlogged(30.1 cm,N=496).1-Loggedhad a lower diameter of 27.7 cm,N=530. In the three forest types, the diameter distribution followed the inverse J-shaped curve frequently observed in natural forests. The stand basal area increased from 29.4 m2/ha in2-Logged, to 32 m2/ha in1-Logged, and to 35.3 m2/ha inUnlogged. These results indicated that logging affected natural regeneration in2-Logged. Above 60 cm dbh, the logging effect was not visible. On 103 tree species found in the sample forest, only nine were classified as harvestable commercial species.
机译：人为干预会改变林分结构，物种组成和森林的再生能力。没有足够的信息来说明不同的管理系统如何影响森林结构。这项研究的主要目的是分析不同采伐强度引起的林分结构和物种组成的差异。该研究是在喀麦隆22 000 ha的低地常绿湿润森林中进行的。将森林分为三种对人类有不同影响的森林类型：2-Logged，1-Logged和Unlogged。 2-Logged（31.8 cm，N = 369）的茎的平均基底面积对应的直径几乎等于Unlogged（30.1 cm，N = 496）的茎的平均基底面积.1-Logged的下直径为27.7 cm，N = 530。在这三种森林类型中，直径分布遵循在天然林中经常观察到的J型倒曲线。林分基础面积从2-Login的29.4 m2 / ha，增加到1-Login的32 m2 / ha，到Unlogged的35.3 m2 / ha。这些结果表明，测井影响了2-测井的自然再生。高于60cm·cm·dbh，测井效果不明显。在样本森林中发现的103种树种中，只有9种被归类为可收获的商业树种。

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