FOLIAGE AREA AND ARCHITECTURE OF PLANT CANOPIES FROM SUNFLECK SIZE DISTRIBUTIONS
FOLIAGE AREA AND ARCHITECTURE OF PLANT CANOPIES FROM SUNFLECK SIZE DISTRIBUTIONS
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DOI：
10.1016/0168-1923(92)90040-b
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发表时间：
1992-08-31
影响因子：
6.2
通讯作者：
BLACK, TA
中科院分区：
文献类型：
--
作者：
CHEN, JM;BLACK, TA
一个泊松模型来描述下集群植物冠层的日照斑点或间隙的大小分布。该模型是基于这样的假设，即树叶丛在空间上是随机分布的，并且树叶元素在每个丛内是随机分布的。利用该模型，计算了各丛的叶丛指数、叶面积指数、丛面积指数、单元面积指数。和元素和丛宽度成功地推导出两个人工冠层和一个间伐和修剪的花旗松林的立场。它表明，现有的理论推导L从测量的冠层间隙分数有局限性，和冠层结构信息的使用来自冠层间隙的大小分布可以大大提高技术间接测量L的植物冠层。
A Poisson model is developed to describe sunfleck or gap size distributions beneath clumped plant canopies. This model is based on the assumption that foliage clumps are randomly distributed in space and foliage elements are randomly distributed within each clump. Using this model, the foliage clumping index, leaf area index (L), clump area index, element area index in each clump. and element and clump widths were successfully derived for two artificial canopies and a thinned and pruned Douglas-fir forest stand. It is shown that existing theories for deriving L from measurements of canopy gap fraction have limitations, and the use of canopy architectural information derived from canopy gap size distribution can substantially improve the technique for indirectly measuring L of plant canopies.