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首页> 外文期刊>Forstwissenschaftliches Centralblatt >Structural characteristics of Albanian beech (Fagus sylvatica L.) virgin forests - Deductions for semi-natural forestry [German]
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Structural characteristics of Albanian beech (Fagus sylvatica L.) virgin forests - Deductions for semi-natural forestry [German]

机译：阿尔巴尼亚山毛榉（Fagus sylvatica L.）原始森林的结构特征-半天然林业的演绎[德语]

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摘要

The results of inventories of forest structure and tree regeneration in three Albanian beech (Fagus sylvatica L.) virgin forests are presented and discussed. The data reveal that these forests are characterized by high levels of (1) stand volume of living trees, (2) diameter differentiation and (3) density of saplings and young trees. Beech is the dominant tree species in the upper canopy layers as well as in the regeneration layer. The mean size of canopy gaps is smaller than the mean crown size of old trees. Therefore; gaps are formed mainly by the death of single trees. Subsequently, forest texture is characterized by small-scale changes in development phases. Giant trees, measuring more than 80 cm at breast height, are another prominent feature of the virgin forests examined. These trees show a clumped distribution with a tendency to randomness. Snags and downed logs above 20 cm in diameter amount to 36.3-85.3 m(3) /ha or 3.9-10.4% of the living stand above 7 cm DBH. Due to a high rate of decomposition, these values are low compared to other pristine forests of the temperate zone.
机译：介绍并讨论了三种阿尔巴尼亚山毛榉（Fagus sylvatica L.）原始森林的森林结构和树木更新的清单结果。数据显示，这些森林的特点是：（1）活树的立木蓄积量高，（2）直径差异和（3）幼树和幼树的密度高。山毛榉是上部冠层和再生层中的主要树种。林冠间隙的平均大小小于老树的平均树冠大小。因此;缺口主要是由单棵树的死亡造成的。随后，森林质地的特征在于发展阶段的小规模变化。在原始森林中，胸高超过80厘米的巨型树木是另一个突出特征。这些树显示出具有随机性的成簇分布。直径超过20 cm的断枝和被砍伐的原木总计36.3-85.3 m（3）/ ha，占7 cm DBH以上的活立木的3.9-10.4％。由于分解速率高，与温带地区其他原始森林相比，这些值较低。

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