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Height–diameter allometry in African monodominant forest close to mixed forest
Journal of Tropical Ecology ( IF 1.4 ) Pub Date : 2021-07-02 , DOI: 10.1017/s0266467421000183
Grace Jopaul Loubota Panzou 1 , Yannick Enock Bocko 2 , Alain Yves Mavoungou 3 , Jean-Joël Loumeto 2
Affiliation  

African monodominant forests are frequently formed by Gilbertiodendron dewevrei (De Wild.) J. Leonard and commonly found close to mixed forests. However, previous studies have ignored differences between these two forest types in height–diameter allometry, which is extremely important for aboveground biomass (AGB) estimates. This study aims to evaluate the performance of height–diameter models and their effects on height attributes and AGB estimations in African monodominant and mixed forests. Four 1-ha plots divided in 16 subplots (0.25 ha) were installed in each forest type in northern Republic of Congo. We measured diameter of all trees ≥ 10 cm diameter for each subplot and we measured the height of 264 trees over a large range of 7–64 m in two forest types. There was a significant difference in height–diameter allometry between two forest types and trees were taller and had greater AGB in monodominant forests than in mixed forests. Two height–diameter models from the literature generated the lowest error values when predicting tree height and AGB in mixed forests, whereas no model derived from the literature was appropriate for monodominant forests. The variation in height–diameter allometry between monodominant and mixed forests influences AGB estimates that have practical implications for carbon monitoring.

中文翻译:

非洲混交林附近单一优势林的高径异速生长

非洲单一优势森林通常由吉柏(De Wild。)J. Leonard,通常在混交林附近发现。然而,以前的研究忽略了这两种森林类型在高度直径异速生长方面的差异,这对于地上生物量 (AGB) 估计极为重要。本研究旨在评估高度-直径模型的性能及其对非洲单一优势林和混交林的高度属性和 AGB 估计的影响。在刚果共和国北部的每种森林类型中安装了四个 1 公顷的地块,分为 16 个子地块(0.25 公顷)。我们测量了每个子地块直径≥10 cm 的所有树木的直径,并测量了两种森林类型中 7-64 m 的大范围内的 264 棵树的高度。两种森林类型之间的高度-直径异速生长存在显着差异,并且在单一优势林中的树木比在混交林中更高并且具有更大的AGB。文献中的两个高度-直径模型在预测混交林中的树高和 AGB 时产生了最低的误差值,而文献中没有任何模型适用于单优势林。单一优势林和混交林之间高度直径异速生长的变化会影响 AGB 估计,这对碳监测具有实际意义。
更新日期:2021-07-02
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