Environmental controls on the characteristics of mean number of forest fires and mean forest area burned (1987-2007) in China
Environmental controls on the characteristics of mean number of forest fires and mean forest area burned (1987-2007) in China
复制标题
中国平均森林火灾次数和平均森林烧毁面积特征（1987—2007年）的环境控制
DOI：
10.1016/j.foreco.2015.07.012
复制
发表时间：
2015-11-15
影响因子：
3.7
通讯作者：
Hu, Yuanman
中科院分区：
文献类型：
--
作者：
Chang, Yu;Zhu, Zhiliang;Hu, Yuanman
火灾规模和火灾频率是衡量火灾特征的重要指标。确定火灾的大小和频率并了解其环境控制对于火灾预测和可持续森林景观管理是必不可少的。本文采用聚类分析的方法，确定了中国地区1987-2007年火灾的五种不同类型，确定了全省火灾的平均数量和平均森林面积。然后，我们进行了冗余分析(RDA)，以探索影响平均火灾次数和平均森林面积空间变异的因素，并确定它们对这种变异的相对贡献。结果表明，中国北部地区平均火灾次数普遍偏低。东北、华北、西北地区火灾总数占全国火灾总数的比例分别为3.49%、3.18%、2.19%。内蒙古和黑龙江的平均森林面积较大，分别为208,786和103,018公顷。RDA分析表明，林地面积百分比和干旱度对中国地区森林火灾特征的空间变异有显著影响(p<；0.05)。这两个变量及其交互作用解释了平均森林火灾数和平均森林面积总方差的44.9%(63%)，其中8.2%是由林地百分比解释的，11.7%是由德马顿干燥度解释的，25.0%是由它们的交互作用解释的。(C)2015爱思唯尔B.V.保留所有权利。
Fire size and fire frequency are important indicators of fire characteristics. Characterizing fire size and fire frequency and understanding its environmental controls are indispensable to fire prediction and sustainable forest landscape management. In this paper, we determined the mean number of fires and the mean forest area burned by province to define five distinct patterns of fires across China by cluster analysis for the period 1987-2007. Then, we performed Redundancy Analysis (RDA) to explore factors influencing the spatial variation in the mean number of fires and the mean forest area burned, and to determine their relative contributions to this variation. Results showed that the north part of China generally had low mean number of fires. Percentage of the total number of fires in northeastern, northern and northwestern region to the total number of fires in whole country is 3.49%, 3.18% and 2.19% respectively. Neimenggu and Heilongjiang had larger mean burned forest area with 208,786 and 103,018 ha respectively. RDA analysis showed that the percentage of forest land and de Martonne aridity had significant impacts on the spatial variation in forest fire characteristics over China (p < 0.05). These two variables and their interactions explained 44.9% of the total variance of the mean number of forest fires and mean forest area burned (63%), out of which 8.2% was explained by percentage of forest land, 11.7% by de Martonne aridity and 25.0% by their interactions. (C) 2015 Elsevier B.V. All rights reserved.