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基于邻近木的林分结构多样性研究

白宇 杨华 温静 王全军

白宇, 杨华, 温静, 王全军. 基于邻近木的林分结构多样性研究[J]. 北京林业大学学报, 2020, 42(6): 52-58. doi: 10.12171/j.1000-1522.20190120
引用本文: 白宇, 杨华, 温静, 王全军. 基于邻近木的林分结构多样性研究[J]. 北京林业大学学报, 2020, 42(6): 52-58. doi: 10.12171/j.1000-1522.20190120
Bai Yu, Yang Hua, Wen Jing, Wang Quanjun. Study on forest structure diversity based on the neighbourhood trees[J]. Journal of Beijing Forestry University, 2020, 42(6): 52-58. doi: 10.12171/j.1000-1522.20190120
Citation: Bai Yu, Yang Hua, Wen Jing, Wang Quanjun. Study on forest structure diversity based on the neighbourhood trees[J]. Journal of Beijing Forestry University, 2020, 42(6): 52-58. doi: 10.12171/j.1000-1522.20190120

基于邻近木的林分结构多样性研究

doi: 10.12171/j.1000-1522.20190120
基金项目: 国家科技支撑计划课题“长白山次生林更新技术研究与示范”(2017YFC0504101)
详细信息
    作者简介:

    白宇。主要研究方向:森林资源监测与评价。Email:1131338362@qq.com 地址:100083 北京市海淀区清华东路35号北京林业大学林学院

    责任作者:

    杨华,博士,副教授。主要研究方向:森林资源监测与评价。Email:huayang8747@163.com 地址:同上

  • 中图分类号: S758.5

Study on forest structure diversity based on the neighbourhood trees

  • 摘要: 目的林分是森林生物多样性的重要组成部分,典型多样性指数由于其复杂性或缺乏生态相关性,不能在空间尺度进行分析,因此无法反映物种和空间结构的内部变化。方法以吉林省汪清县金沟岭林场的落叶松−云冷杉混交林为例,采用相邻格子法建立了2块60 m × 60 m典型样地,对描述邻近木空间单元多样性的新指数——邻近木多样性指数进行评估。结果(1)研究区落叶松−云冷杉林直径结构曲线呈多峰的反“J”型曲线,中小径阶林木所占比例较高,大径阶林木较少,径阶株数分布连续且较为合理。(2)落叶松−云冷杉林的物种多样性和林木直径大小多样性高,树种和径阶分布较为均匀,混交程度强,水平结构变异大,林分结构复杂。(3)按3种邻近木多样性指数(物种多样性Hs、按径阶分布的结构多样性Hdcd、按直径变化的结构多样性Sdv)的分析结果与传统的Shannon多样性指数的结果保持一致,对具有相似结构的林分计算时得到了接近的指数值。结论邻近木多样性指数可以描述林分多样性及空间结构特征,并反映物种和结构多样性的空间变化,且具有明显的生态意义,可应用于林分结构调整,为森林合理经营提供理论依据。

     

  • 图  1  邻近木空间单元示例

    Figure  1.  Example of spatial structure unit of neighbourhood trees

    图  2  落叶松−云冷杉混交林的直径分布

    Figure  2.  Diameter distribution of larch-spruce-fir mixed stands

    图  3  邻近木多样性指数

    H′为传统Shannon多样性指数结果,DV为林分整体直径的标准差。H′ is the result of Shannon diversity index, and DV is the standard deviation of the whole stand diameter.

    Figure  3.  Neighbourhood diversity indices

    图  4  不同邻近木多样性取值对应的株数分布情况

    Figure  4.  Tree number distribution corresponding to different neighbourhood diversity values

    表  1  样地调查因子

    Table  1.   Survey factors of sample plots

    样地
    Sample
    plot
    株数
    Tree number
    密度/
    (株·hm− 2)Density/
    (tree·ha− 1)
    树种组成
    Tree species
    composition
    胸径 DBH/cm树高 Tree height/m平均冠幅
    Average crown width/m
    最大
    Max.
    最小
    Min.
    平均
    Average
    最大
    Max.
    最小
    Min.
    平均
    Average
    南北
    South-north
    东西
    East-west
    样地1
    Sample plot 1
    3611 0032落1冷1杨1枫1云1红1椴1白1色+黄+水−青−花
    46.65.018.623.93.514.55.015.05
    样地2
    Sample plot 2
    4301 1943落2冷1红1白1云1枫1色+
    水+杨−椴−青−花
    43.25.017.522.92.913.63.503.43
    注Notes: 落. 落叶松 Larix olgensis;冷. 冷杉 Abies nephrolepis;杨. 大青杨 Populus ussuriensis;枫. 枫桦 Betula costata;云. 红皮云杉 Picea koraiensis,鱼鳞云杉Picea jezoensis;红. 红松 Pinus koraiensis;椴. 紫椴 Tilia amurensis;白. 白桦 Betula platyphylla;色. 色木槭 Acer mono;黄. 黄檗 Phellodendron amurense;水. 水曲柳 Fraxinus mandshurica;青. 青楷槭 Acer tegmentosum;花. 花楷槭 Acer ukurunduense.
    下载: 导出CSV

    表  2  邻近木多样性的林内空间变异(变异系数)

    Table  2.   Within-stand spatial variation (coefficients of variation) in neighbourhood diversity

    邻近木多样性指数
    Neighbourhood diversity index
    样地
    Sample plot
    邻近木空间单元大小
    Spatial unit size of neighbourhood trees
    4681012
    Hs样地1
    Sample plot 1
    0.360.240.180.140.12
    样地2
    Sample plot 2
    0.330.250.210.180.15
    Hdcd样地1
    Sample plot 1
    0.190.140.120.100.08
    样地2
    Sample plot 2
    0.230.170.140.110.11
    Sdv样地1
    Sample plot 1
    0.470.360.310.270.25
    样地2
    Sample plot 2
    0.520.400.350.310.29
    下载: 导出CSV

    表  3  相邻4株木情况下邻近木多样性可能的取值范围

    Table  3.   Possible value range of neighbourhood diversity under the condition of 4 neighbourhood trees

    邻近木多样性取值
    Neighbourhood diversity value
    说明
    Interpretation
    图示
    Diagram
    分布情况
    Distribution situation
    0个数比为4∶0∶0∶0
    Ratio of number is 4∶0∶0∶0
    很不均匀
    Very irregular
    0.56个数比为3∶1∶0∶0
    Ratio of number is 3∶1∶0∶0
    不均匀
    Irregular
    0.69个数比为2∶2∶0∶0
    Ratio of number is 2∶2∶0∶0
    随机
    Random
    1.04个数比为2∶1∶1∶0
    Ratio of number is 2∶1∶1∶0
    均匀
    Regular
    1.39个数比为1∶1∶1∶1
    Ratio of number is 1∶1∶1∶1
    很均匀
    Very regular
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-03-04
  • 修回日期:  2019-03-15
  • 网络出版日期:  2020-05-07
  • 刊出日期:  2020-07-01

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