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基于结构方程模型的林分上下层间结构与树木多样性耦合关系研究

周健平 王树力

周健平, 王树力. 基于结构方程模型的林分上下层间结构与树木多样性耦合关系研究[J]. 北京林业大学学报, 2015, 37(9): 9-16. doi: 10.13332/j.1000-1522.20140400
引用本文: 周健平, 王树力. 基于结构方程模型的林分上下层间结构与树木多样性耦合关系研究[J]. 北京林业大学学报, 2015, 37(9): 9-16. doi: 10.13332/j.1000-1522.20140400
ZHOU Jian-ping, WANG Shu-li.. Coupling relationship of structure and tree diversity between upper and lower canopy layer based on structural equation model.[J]. Journal of Beijing Forestry University, 2015, 37(9): 9-16. doi: 10.13332/j.1000-1522.20140400
Citation: ZHOU Jian-ping, WANG Shu-li.. Coupling relationship of structure and tree diversity between upper and lower canopy layer based on structural equation model.[J]. Journal of Beijing Forestry University, 2015, 37(9): 9-16. doi: 10.13332/j.1000-1522.20140400

基于结构方程模型的林分上下层间结构与树木多样性耦合关系研究

doi: 10.13332/j.1000-1522.20140400
基金项目: 

“十二五”国家科技支撑计划项目(2012BAD21B02)。

详细信息
    作者简介:

    周健平,博士生。主要研究方向:生态学、水土保持及荒漠化防治。Email: jianping_zhou1989@163.com 地址:150040黑龙江省哈尔滨市香坊区和兴路26号东北林业大学林学院。

    责任作者:

    王树力,教授。主要研究方向:生态学、水土保持及荒漠化防治。Email:shuliwang@163.com 地址:同上。

Coupling relationship of structure and tree diversity between upper and lower canopy layer based on structural equation model.

  • 摘要: 为探讨林分上下层间结构与树木多样性的关系,以阿什河流域天然次生杂木林为对象,构建了立地条件-林分上层结构-林分上层树木多样性-林分下层结构与树木多样性的结构方程模型。结果表明:立地条件(ξ1)对林分上层结构(ξ2)具有直接正影响,影响系数为0.59;对林分上层树木多样性(ξ3)具有正影响,总影响系数为0.75,直接影响系数为0.43;对林分下层结构与树木多样性(ξ4)具有负影响,总影响系数为-0.58,直接影响系数为-0.12。林分上层结构(ξ2)对林分上层树木多样性(ξ3)具有直接正影响,影响系数为0.55;对林分下层结构与树木多样性(ξ4)具有负影响,总影响系数为-0.55,直接影响系数为-0.38。林分上层树木多样性(ξ3)对林分下层结构与树木多样性(ξ4)具有直接负影响,影响系数为-0.31。对林分下层密度(x11)影响最大的林分上层观测变量为林分上层树冠面积(x7),总影响系数为-0.19,直接影响系数为-0.12。对林分下层平均树高(x12)影响最大的林分上层观测变量为林分上层平均树高(x6),总影响系数为-0.28,直接影响系数为-0.13。林分上层树冠面积(x7)和树高多样性(x10)对林分下层树种多样性(x14)影响较大,影响系数分别为-0.38和-0.36。树冠面积(x7)的影响全为直接影响;树高多样性(x10)的直接影响大于间接影响;林分上层结构(ξ2)与树木多样性(ξ3)中的观测变量对林分下层树冠面积(x13)影响不明显。

     

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  • 收稿日期:  2014-10-21
  • 刊出日期:  2015-09-30

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