森林公园林木枯倒驱动因素及空间分布特征分析  

Driving factors and spatial distribution characteristics of fallen dead wood in forest park

作　　者：胡娟娟 李律己 彭钰雯 HU Juanjuan;LI Lyuji;PENG Yuwen(East China Survey and Planning Institute of National Forestry and Grassland Administration,Hangzhou 310019,China;College of Forestry,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]国家林业和草原局华东调查规划院,浙江杭州310019 [2]南京林业大学,林学院,江苏南京210037

出　　处：《林业与生态科学》2025年第2期119-126,共8页Forestry and Ecological Sciences

基　　金：国家自然科学基金项目(31170592)。

摘　　要：以紫金山国家森林公园风景林为研究对象,以南京紫金山国家森林公园2018年98块典型样地调查中的枯倒木调查数据为主要信息源,结合2018年南京地区Landsat 8 OLI遥感影像、紫金山DEM数据、研究区矢量路网及居民点数据,在计算样地枯倒木蓄积量基础上,采用Pearson相关系数分析、地理探测器交互作用分析,进行研究区林木枯倒驱动因素及空间分布特征分析。研究表明:(1)98块样地枯倒木蓄积量合计为47.351 m^(3),平均值为0.488 m^(3),麻栎(Quercus acutissima)、马尾松(Pinus massoniana)、枫香(Liquidambar formosana)3个优势树种的枯倒木蓄积占总蓄积的66.18%。(2)Pearson相关分析表明,坡向、土壤湿度对枯倒木产生具有显著影响。(3)地理探测器的交互作用分析显示,居民点及道路等人为干扰因素与枯树木年龄的双重作用对于枯倒木数量有较高的解释力。(4)紫金山枯倒木大多分布在研究区的山脊、北坡,南坡枯倒木蓄积量较少,表明森林经营活动对枯倒木的数量及分布造成较大的影响。综上所述,地形与土壤特征、林分结构因子、人为干扰因子是影响研究区枯倒木数量及空间分布的主要因素。In this research,the scenic forests of Zijinshan National Forest Park was taken as the research subject,and the data about the fallen dead wood from 98 typical sample plots within the Nanjing Zijinshan National Forest Park was collected in 2018.Besides,with Landsat 8 OLI remote sensing imagery of the Nanjing area in 2018,DEM data of Zijinshan Mountain,and the vector road network data as well as residential data of the study area,the driving factors and spatial distribution characteristics of fallen dead wood in the study area were analyzed by using Pearson correlation coefficient analysis and interaction analysis of geographic detector based on calculating the stock of fallen trees in the sample plot.The result indicated that:(1)The total volume of dead wood in the 98 plots was 47.351 m^(3),with an average of 0.488 m^(3).The dead wood volume in the three dominant tree species of Quercus acutissima,Pinus massoniana and Liquidambar formosana accounted for 66.18%of the total volume.(2)The occurrence of fallen dead wood was significantly influenced by slope aspect and soil moisture,as demonstrated by the Pearson analysis.(3)Anthropogenic disturbances,such as proximity to residential areas and roads,along with the age of dead woods,were found to have a substantial explanatory effect to the quantity of fallen dead wood,as revealed by the interaction analysis of the geo-detector.(4)Ecological sensitivity analysis showed that fallen dead wood in Zijinshan Mountain was predominantly distributed across ecologically sensitive ridges and northern slopes.In contrast,the southern slopes,which harbored fewer dead wood instances,were observed to be significantly affected by forest management activities regarding the dead wood's quantity and distribution.In conclusion,topographic and soil characteristics,stand structure factors and human disturbance factors were the main factors affecting the number and spatial distribution of fallen dead wood in the study area.

关 键 词：枯倒木 驱动因素 空间分布 紫金山 

分 类 号：S757.4[农业科学—森林经理学]