Forest harvest index: Accounting for global gross forest cover loss of wood production and an application of trade analysis
Forest harvest index: Accounting for global gross forest cover loss of wood production and an application of trade analysis
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DOI：
10.1016/j.gecco.2015.06.011
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发表时间：
2015-07-01
影响因子：
4
通讯作者：
Kaneko, Nobuhiro
中科院分区：
文献类型：
--
作者：
Furukawa, Takuya;Kayo, Chihiro;Kaneko, Nobuhiro
森林覆盖丧失是全球生物多样性下降和大气碳排放增加的主要原因。本研究重点关注伐木的影响，引入了木材生产指数，即森林采伐指数（FHI），该指数计算了反映全球范围内对木材和木制品需求的预期森林覆盖总损失（GFCL）。我们通过调查FHI与遥感测量的实际GFCL之间的关系来检验该指数的准确性和精密度。该指数纳入了木材和气候特定的生物量扩张系数以及特定国家的立木密度，将木材产量转换为预期的 GFCL。我们定量研究了从 FRA 2010 获得的生长存量密度值的数据不确定性对 FHI 和实际 GFCL 之间预测关系的影响。我们对所考虑的 139 个国家中每一个国家 5 年期间（2000 财年至 2004 财年）的工业原木和木质燃料的 FHI 进行了量化。结果表明，工业原木的FHI（1860万公顷年（-1））与同期的实际GFCL（1930万公顷年（-1））很好地对应。数据不确定性分析表明，增加国家层面的森林监测频率可以提高FHI的精度和准确度，但FHI与实际GFCL之间也存在差异。此外，为了证明我们的指数作为木制品虚拟 GFCL 指标的实用性，我们根据全球木材贸易数据将 FHI 分为出口、进口和国内，并比较了与实际 GFCL 的关系强度。出口FHI与GFCL存在很强的正相关关系，其效应远远超过进口FHI的补偿效应，表明木材贸易在全球范围内总体上增加了GFCL。 (C) 2015 年作者。由 Elsevier B.V. 出版
Forest cover loss is a major cause of both the decline in global biodiversity and the increase in carbon emissions into the atmosphere. Focusing on the effects of logging, this study introduces an index of wood production, the forest harvest index (FHI), which calculates the expected gross forest cover loss (GFCL) reflecting the demand for timber and wood products at the global scale. We examined the accuracy and precision of the index by investigating the relationship between the FHI and actual GFCL measured through remote sensing. The index incorporates wood- and climate-specific biomass expansion factors and country-specific growing stock densities to convert wood production volume to expected GFCL. We quantitatively examined the effect of data uncertainty in the growing stock density values obtain from FRA 2010 on the predicted relationship between the FHI and actual GFCL. We quantified the FHI for both industrial roundwood and wood fuel during a 5-year period (FY2000-FY2004) in each of the 139 nations considered. Results demonstrated that the FHI of industrial roundwood (18.6 million ha yr(-1)) corresponds well to actual GFCL (19.3 million ha yr(-1)) during the same period. The data uncertainty analysis suggested that increasing the frequency of forest monitoring at the national level can improve the precision and accuracy of the FHI, but discrepancies between the FHI and actual GFCL were also identified. Furthermore, to demonstrate the utility of our index as a metric of virtual GFCL of wood products, we disaggregated the FHI into export, import and domestic based on global wood trade data and compared the strength of the relationship with actual GFCL. Export FHI had a strong positive relationship with GFCL, which effect far exceeded the compensating effect of import FHI, indicating that wood trade overall increased GFCL at the global scale. (C) 2015 The Authors. Published by Elsevier B.V.