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    王烁, 韩大校, 王千雪, 丛日征, 王晓红, 杨光, 王立中, 张吉利. 不同林火烈度对大兴安岭兴安落叶松天然林林木空间分布格局的影响[J]. 北京林业大学学报, 2023, 45(2): 87-95. DOI: 10.12171/j.1000-1522.20210367
    引用本文: 王烁, 韩大校, 王千雪, 丛日征, 王晓红, 杨光, 王立中, 张吉利. 不同林火烈度对大兴安岭兴安落叶松天然林林木空间分布格局的影响[J]. 北京林业大学学报, 2023, 45(2): 87-95. DOI: 10.12171/j.1000-1522.20210367
    Wang Shuo, Han Daxiao, Wang Qianxue, Cong Rizheng, Wang Xiaohong, Yang Guang, Wang Lizhong, Zhang Jili. Effects of different forest fire intensities on the spatial distribution pattern of natural Larix gmelinii forests in the Great Xing’an Mountains of northeastern China[J]. Journal of Beijing Forestry University, 2023, 45(2): 87-95. DOI: 10.12171/j.1000-1522.20210367
    Citation: Wang Shuo, Han Daxiao, Wang Qianxue, Cong Rizheng, Wang Xiaohong, Yang Guang, Wang Lizhong, Zhang Jili. Effects of different forest fire intensities on the spatial distribution pattern of natural Larix gmelinii forests in the Great Xing’an Mountains of northeastern China[J]. Journal of Beijing Forestry University, 2023, 45(2): 87-95. DOI: 10.12171/j.1000-1522.20210367

    不同林火烈度对大兴安岭兴安落叶松天然林林木空间分布格局的影响

    Effects of different forest fire intensities on the spatial distribution pattern of natural Larix gmelinii forests in the Great Xing’an Mountains of northeastern China

    • 摘要:
        目的  林木空间分布格局对于评估森林是否需要经营至关重要,判断林木处于哪种分布状态(聚集分布、随机分布或者均匀分布)是制定合理的森林经营方案的前提。中重度林火会直接导致林木大量死亡,进而改变林分直径分布特征及林木空间分布格局。本文主要研究了达尔滨湖国家森林公园林火发生一年后,不同火烧烈度下兴安落叶松林的林分状态。
        方法  通过比较林分直径分布、不同类别树木空间格局及其关联性,分析林火对林木空间格局的影响。
        结果  火烧烈度高的区域,小径级林木存活数量少,小死树的聚集半径相对小。与未过火样地相比,发生火烧的区域,中活树均出现中等尺度的聚集。中度火烧样地内的中树和小树存在关联性,中死树与周围的小死树在4 ~ 8 m范围内呈正相关,中活树与周围的小死树在8 ~ 20 m范围内呈负相关。
        结论  火烧烈度会影响树木的空间格局以及不同大小不同存活状态树木之间的关联性。针对不同火烧烈度下林木的聚集尺度选择适合的抚育措施对火后森林恢复具有重要意义。本研究可为兴安落叶松林的火后恢复提供科学依据。

       

      Abstract:
        Objective  The spatial distribution pattern of trees is important for evaluating whether the forest needs to be managed, and judging which distribution state (aggregated distribution, random distribution, or uniform distribution) of trees is a prerequisite for developing suitable management plans. Moderate and high severity forest fires can kill a large number of trees, and then change the distribution characteristics of stand diameter and the spatial distribution pattern of forest trees. We investigated natural Larix gmelinii forests in the Da’erbinhu National Forest Park, Inner Mongolia of northern China one year following a mixed-severity wildfire.
        Method  By comparing the distribution of stand diameter, the spatial distribution pattern of different types of trees and their association, we analyzed the influence of fire on the spatial distribution pattern of trees.
        Result  The results showed that in high severity areas, the number of small living trees and the gathering radius of small dead trees were relatively small. Compared with the unburned sample plots, the medium living trees presented a clustered distribution at the medium scale in the burned areas. The middle trees and the small trees were associated in the moderate severity burned sample plots. The medium dead trees and the surrounding small dead trees were positively associated within a radius of 4 to 8 m, while the medium living trees and the surrounding small dead trees were negatively associated within a radius of 8 to 20 m.
        Conclusion  The spatial pattern of trees and the association between trees of different sizes and different status are affected by the fire severity. Choosing suitable afforestation measures according to the aggregation scale of trees for different fire severities is of great significance to forest restoration after a fire. This study can provide a scientific basis for the protection and rational use of nature larch forests in the Great Xing’an Mountains of northeastern China.

       

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