大兴安岭地区火干扰强度与林分空间格局的动态关系  

Dynamic of Spatial Pattern under Different Fire Disturbance Intensity in Daxing’an Mountains

作　　者：王安彬 高露双[1] 杨晶[1] Wang Anbin;Gao Lushuang;Yang Jing(Beijing Forestry University,Beijing 100083,P.R.China)

机构地区：[1]北京林业大学,北京100083

出　　处：《东北林业大学学报》2021年第3期52-56,66,共6页Journal of Northeast Forestry University

基　　金：国家重点研发计划重点专项项目(2017YFC0504003-1)。

摘　　要：以大兴安岭根河地区兴安落叶松林为研究对象,在1987年、2003年和2015年受到火干扰区域选取中度、重度火干扰样地,并设置未受火干扰的对照样地,运用树轮数据和样地调查数据,分析火干扰下林分结构特征及其空间分布格局动态。结果表明:3~5 m尺度上不同火干扰强度下林分空间格局存在差异且具有阶段性。中度火干扰的兴安落叶松林,恢复5 a趋向均匀分布,恢复15 a和31 a后呈聚集分布;而重度火干扰的兴安落叶松林,恢复5 a趋向聚集分布,恢复15 a呈随机分布,恢复31 a呈聚集分布。不同树种空间分布格局有所不同,重度火干扰的白桦林,恢复初期由随机分布变为不显著聚集分布,恢复10 a后呈显著聚集分布,恢复31 a后,在3 m以上的尺度上又变为不显著聚集分布甚至趋向随机分布。因此,火干扰样地林分空间格局研究应考虑物种差异以及响应的滞后性。The moderate and severe fire-disturbed sample plots were selected in the fire-disturbed areas in 1987,2003 and 2015,and control plots without fire disturbance were set up in the Genhe region of the Daxing’an Mountains.Using tree ring data and sample plot survey data,we analyzed the structural characteristics of stands and their spatial distribution pattern dynamics under fire disturbance.The spatial patterns of stands differed between 3 and 5 m scales with different fire disturbance intensities,and were phased.In moderately fire-disturbed Xing’an larch forests,the recovery 5-a tended to be uniformly distributed,and the recovery 15-and 31-a showed aggregated distribution;while in heavily fire-disturbed Xing’an larch forests,the recovery 5-a tended to be aggregated,the recovery 15-a showed random distribution,and the recovery 31-a showed aggregated distribution.The spatial distribution patterns of different tree species were different.In the heavy fire-disturbed birch forest,the distribution changed from random to non-significantly aggregated at the beginning of recovery,and then to significantly aggregated after 10 a;after 31 a,the heavy fire-disturbed birch forest became non-significantly aggregated or even tended to be randomly distributed at a scale of 3 m or more.Therefore,the study on spatial pattern of stands in fire-disturbed sample sites should take species differences and the lag of response on consideration.

关 键 词：林分空间格局 火干扰 大兴安岭 兴安落叶松 

分 类 号：S718.5[农业科学—林学]