Distribution of residual vegetation associated with large fires in Alberta
Distribution of residual vegetation associated with large fires in Alberta
复制标题
艾伯塔省与大火相关的残余植被分布
DOI：
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发表时间：
1987
期刊：
影响因子：
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通讯作者：
P. Woodard
中科院分区：
文献类型：
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作者：
Kevin E. Eberhart;P. Woodard
火灾的大小和形状，数量和大小的岛屿的残留植被，数量的边缘，和距离残留植被进行了分析，为69个火灾，烧毁在阿尔伯塔1970年和1983年之间。这些火灾的面积从21公顷到17 770公顷不等。 比较了5个林火等级中残余植被的分布情况。在最小规模的类（20-40公顷）火灾不包含任何未燃烧的植被岛屿。 火灾范围内实际受到干扰的面积百分比随着火灾规模的增加而下降。第三和第四大火灾规模等级（201-400和401-2000公顷）每100公顷未燃烧岛屿的数量最高。 中位岛面积每次火灾，火灾形状指数，和边缘指数增加火灾的大小。在100、200、300、400和500 m范围内的植被覆盖率随林火规模的增大而减小。 这些结果表明，随着火灾规模的增加，自然重新造林的潜力下降，对一些野生动物栖息地的好处增加。
Fire size and shape, number and size of islands of residual vegetation, amount of edge, and distances to residual vegetation were analyzed for 69 fires that burned in Alberta between 1970 and 1983. These fires ranged in size from 21 to 17 770 ha. Distribution of residual vegetation was compared among five fire size classes. Fires in the smallest size class (20–40 ha) did not contain any islands of unburned vegetation. Percent of area within the fire perimeter that was actually disturbed decreased with increasing fire size. The number of unburned islands per 100 ha was highest for the third and fourth largest fire size classes (201–400 and 401–2000 ha). Median island area per fire, fire shape index, and edge index increased with fire size. Percentages of burned area within 100, 200, 300, 400, and 500 m of residual vegetation decreased with increasing fire size. These results indicate decreased potential for natural reforestation and increased benefits to some wildlife habitats as fire size increases.