Department of Environmental Science, Faculty of Science, Chulalongkorn University, Bangkok, Thailand.
Environment, Health and Social Data Analytics Research Group, Chulalongkorn University, Bangkok, Thailand.
Sci Rep. 2020 Apr 14;10(1):6266. doi: 10.1038/s41598-020-63145-x.
Khaya ivorensis (K. ivorensis), one of the most valuable tropical hardwood species indigenous to West and Central Africa, has been classified as a threatened tree species. However, information on its remaining population and distribution are limited. We mapped the current K. ivorensis spatial distribution, modelled the spatial autocorrelation and estimated its economic value using volume estimation and market pricing. The study was conducted in Odigbo and Irele local government areas (LGA), Ondo State, Nigeria. Spatially, localities of 97 K. ivorensis were identified across the study area and can be added into a wide range of datasets from local to global inventories. Large trees in diameter and height were statistically clustered in the north of Odigbo and assumed to relate with forest reserve management. Estimated median tree volumes were 0.39 m and 0.31 m in accordance with the allometric volume function and specific volume function, respectively. The economic values of wood varied approximately from US$111,208 to US$72,081. Findings from this study are a valuable resource for conserving this species and other threatened tree species.
象牙海岸桃花心木（K. ivorensis）是原产于西非和中非的最有价值的热带硬木物种之一，已被列为受威胁树种。然而，关于其现存种群和分布的信息有限。我们绘制了当前象牙海岸桃花心木的空间分布，模拟了空间自相关，并使用体积估计和市场定价估算了其经济价值。该研究在尼日利亚翁多州奥迪戈博和伊雷勒地方政府区进行。在研究区域内确定了 97 个象牙海岸桃花心木的地理位置，可以将其添加到从本地到全球清单的各种数据集。直径和高度较大的树木在奥迪戈博的北部呈统计聚类，据推测与森林保护区管理有关。根据异速生长体积函数和比体积函数，估计的中位数树木体积分别为 0.39 m 和 0.31 m。木材的经济价值大约在 111,208 美元至 72,081 美元之间。本研究的结果为保护该物种和其他受威胁树种提供了宝贵的资源。
