The Spatiotemporal Pattern of Fires in Northern Taiga Larch Forests of Central Siberia
The Spatiotemporal Pattern of Fires in Northern Taiga Larch Forests of Central Siberia
复制标题
西伯利亚中部北针叶林落叶松林火灾时空格局
DOI：
10.1007/s11184-005-0077-z
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发表时间：
2005
影响因子：
1.1
通讯作者：
K. Ranson
中科院分区：
文献类型：
--
作者：
V. Kharuk;M. Dvinskaya;K. Ranson
研究了鄂温克落叶松林火灾的周期性及其与景观要素的关系。在72个试验地块中分析了过去火灾造成的"烧伤"横截面;火灾年表涵盖了15世纪至20世纪的时期。用两种方法计算了落叶松的火间间隔（BFI）：（I）仅根据燃烧和（II）根据燃烧和最早火灾后新一代落叶松生长的开始。BFI取决于当地的地形特征;东北坡、西南坡、沼泽和平地的BFI分别为86 ± 11（105 ± 12）、61 ± 8（73 ± 8）、139 ± 17（138 ± 18）和68 ± 14（70 ± 13）年。通过方法I和方法II计算的平均BFI分别为82 ± 7和95 ± 7年。森林火灾后，多年冻土层以每年0.3厘米的平均速率上升。研究表明，火灾的数量在36年和82年的周期内经常达到峰值。火灾频率也有时间趋势：平均BFI在19世纪约为100年，在20世纪为65年。
The periodicity of fires in larch forests of Evenkia and their relationship with landscape elements have been studied. Cross-sections with “burns” in them caused by past fires have been analyzed in 72 test plots; the fire chronology encompassed the period from the 15th to the 20th century. The between-fire intervals (BFIs) have been calculated by two methods: (I) on the basis of burns alone and (II) on the basis of burns and the start of growth of the new generation of larch after the earliest fire. The BFI depends on local orographic features; it is 86 ± 11 (105 ± 12), 61 ± 8 (73 ± 8), 139 ± 17 (138 ± 18), and 68 ± 14 (70 ± 13) years for northeastern slopes, southwestern slopes, bogs, and flatlands, respectively. The mean BFIs calculated by methods I and II are 82 ± 7 and 95 ± 7 years, respectively. The permafrost horizon rises at a mean rate of 0.3 cm per year after a forest fire. It has been shown that the number of fires regularly peaks at periods of 36 and 82 years. There is also a temporal trend in fire frequency: the mean BFI was approximately 100 years in the 19th century and 65 years in the 20th century.