Multi-dimension models of architectural development in forest tree populations

研究了受树间相互作用调节的林木种群的发育过程，特别是参考了树木个体的建筑性能。建立了新的数学模型和定量监测技术。(1)树木的建筑性能是由树干直径、顶高、冠幅和叶质量等一系列参数来表征的。为了评价建筑性能的塑性响应，建立了二维尺寸动态模型，考察了林分的发育规律。(2)利用双层格子模型的概念，建立了森林水平格局的动态模型，并对两种系统的稳定性进行了分析。(3)作为森林种群动态的一个关键参数，采集率在野外普查中很难测量。开发了一种新的估测叶片质量分布的新技术--GF估计法。(4)开发了一种非破坏性的叶片质量分布估测技术。(5)利用一个简单的动态结构模型评价了叶片模式对枝条的重要性。

Developmental processes of forest tree populations regulated by among-tree interactions were examined, with special reference to the architectural performance of tree individuals. Particular effort was paid to develop new mathematical models and quantitative monitoring techniques.(1) Architectural performance of a tree is characterized by a set of such parameters as trunk diameter, top height, crown volume, and leaf mass. To evaluate plastic response of architectural performance, two-dimensional size dynamic model was developed, and pattern of stand development was examined.(2) Dynamics of the horizontal forest pattern was modeled by employing the concept of two-layred lattice model, and the stability in two-species systems were analytically examined.(3) Recruitment rate, as a key parameter of forest population dynamics, is difficult to measure in field censuses. A new technique of estimating recruitment rate, named Gf estimation, was developed.(4) Non-destructive technique of the estimation of leaf mass distribution was developed using CCD camera.(5) Significance of leafing pattern on a shoot was evaluated by a simple dynamic architecture model.