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首页> 外文期刊>Ecological research >Horizontal, but not vertical canopy structure is related to stand functional diversity in a subtropical slope forest
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Horizontal, but not vertical canopy structure is related to stand functional diversity in a subtropical slope forest

机译：在亚热带斜坡森林中，水平而非垂直冠层结构与林分功能多样性有关

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摘要

The aim of this study was to analyse the relation of horizontal and vertical canopy structure to tree functional diversity of a highly diverse subtropical broad-leaved slope forest, stratified for different successional stages. This is of particular interest because many key ecosystem processes and functions are related to the arrangement of forest canopies. We assessed the effect of stand-related functional diversity (FD_Q, measured as Rao's quadratic entropy of leaf traits), together with other environmental variables on horizontal [measured as relative crown projection areas (CPA_r)] and vertical [relative crown overlap, coefficients of variation (CV) of crown positioning variables] structure of the upper canopy at the local neighbourhood level. The analyses with mixed effects models revealed a negative relation (p= 0.025; estimate -0.07) between FD_Q and CPA_r. No significant effect of FD_Q on vertical canopy structure has been found (p > 0.05). The findings are discussed with regard to resource partitioning and niche differentiation of canopy and sub-canopy species. Successional stage positively impacted the CV of crown length (p = 0.019; estimate 0.03) but did not affect other response variables. The sloping terrain strongly influenced vertical canopy structure as revealed by the significant effect of slope inclination on CV of crown length (p = 0.004; estimate -0.05) and of slope aspect on CV of mean crown height (p = 0.036; estimate -0.03). The high complexity of vertical crown positioning depending on the heterogeneous sloping terrain of the study area may have obscured relations of FD_Q to vertical canopy structure.
机译：这项研究的目的是分析水平和垂直冠层结构与高度不同的亚热带阔叶斜坡森林的树木功能多样性之间的关系，该森林按不同的演替阶段进行了分层。由于许多关键的生态系统过程和功能与林冠层的布置有关，因此特别令人感兴趣。我们评估了与林分相关的功能多样性（FD_Q，以叶片性状的饶氏二次熵度量）以及其他环境变量对水平[以相对冠投影面积（CPA_r）度量]和垂直[相对冠重叠，系数冠位置变量的变化（CV）在局部邻域水平上冠层的结构。使用混合效应模型进行的分析表明，FD_Q和CPA_r之间存在负相关关系（p = 0.025；估计值-0.07）。尚未发现FD_Q对垂直冠层结构有显着影响（p> 0.05）。讨论了有关冠层和亚冠层物种的资源分配和生态位分化的发现。演替阶段积极影响冠长的CV（p = 0.019；估计值为0.03），但不影响其他响应变量。斜坡倾斜对冠冠长度的CV（p = 0.004；估计值-0.05）和坡度纵横比对平均冠冠高度的CV（p = 0.036；估计值-0.03）有显着影响，表明倾斜的地形对垂直冠层结构有很大影响。 。垂直冠冠定位的高度复杂性取决于研究区域的非均匀倾斜地形，可能会模糊FD_Q与垂直冠层结构的关系。

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  • 来源
    《Ecological research》 |2012年第1期|p.181-189|共9页
  • 作者

    Anne C. Lang; Werner Hardtle; Helge Bruelheide; Wenzel Krober; Matthias Schroter; Henrik von Wehrden; Goddert von Oheimb;

  • 作者单位

    Faculty Sustainability, Institute of Ecology, Leuphana University Liineburg, Scharnhorststr. 1, 21335 Liineburg, Germany;

    Faculty Sustainability, Institute of Ecology, Leuphana University Liineburg, Scharnhorststr. 1, 21335 Liineburg, Germany;

    Institute of Biology /Geobotany and Botanical Garden, University of Halle, Am Kirchtor 1, 06108 Halle, Germany;

    Institute of Biology /Geobotany and Botanical Garden, University of Halle, Am Kirchtor 1, 06108 Halle, Germany;

    Faculty Sustainability, Institute of Ecology, Leuphana University Liineburg, Scharnhorststr. 1, 21335 Liineburg, Germany,Environmental Systems Analysis Group, Wageningen University, PO Box 47, 6700 AA Wageningen, The Netherlands;

    Faculty Sustainability, Institute of Ecology, Leuphana University Liineburg, Scharnhorststr. 1, 21335 Liineburg, Germany,Centre of Methods, Leuphana University Liineburg, Scharnhorststr. 1, 21335 Liineburg, Germany;

    Faculty Sustainability, Institute of Ecology, Leuphana University Liineburg, Scharnhorststr. 1, 21335 Liineburg, Germany;

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  • 正文语种 eng
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  • 关键词

    BEF-china; gutianshan national nature reserve; niche differentiation; tree individual; coefficient of variation;

    机译：BEF-中国;古田山国家级自然保护区;生态位分化;树个体变异系数;

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