贵州梵净山亮叶水青冈解剖特征的生态格局及主导因子分析  

Ecological Patterns in Anatomic Characters of Leaves and Woods of Fagus lucida and Their Climatic Control in Mountain Fanjingshan, Guizhou, China

作　　者：方精云[1] 费松林[1] 樊拥军[2] 崔克明[3] 

机构地区：[1]北京大学城市与环境学系,北京100871 [2]南开大学生命科学学院,天津300071 [3]北京大学生命科学学院,北京100871

出　　处：《Acta Botanica Sinica》2000年第6期636-642,共7页Acta Botanica Sinica（植物学报：英文版）

基　　金：国家杰出青年科学基金资助项目!( 3 942 5 0 0 3 );国家自然科学基金重点项目!( 3 983 0 0 5 0 )

摘　　要：使用具有不同生物学意义的生态因子为环境变量 ,应用多元统计方法 ,分析了贵州梵净山的亮叶水青冈(FaguslucidaL .)叶片及木材形态解剖特征的生态格局和影响其变化的主导生态因子。结果表明 ,随着温度要素的增加 ,叶片的所有解剖特征、叶表面的气孔面积以及木材的导管直径、纤维长度均显示下降趋势 ,而叶表面的气孔器密度、木材的导管频率和单列射线高度呈上升趋势 ;随着寒冷指数 (负积温 )和水分因子 (年降水和水分综合指数 )的增加 ,叶片的所有解剖特征、叶表面气孔面积、木材的导管直径和导管长度以及纤维长度均呈明显增加趋势 ,而叶表面的气孔密度和木材的导管频率、单列射线高度则呈下降趋势。逐步回归分析表明 ,水分因素是影响叶片解剖特征、木材的导管频率、导管分子长度和宽度以及纤维长度的主导因子 ;降水量是叶表面气孔器密度变化的制约因子 ,而温度因素则决定着气孔器面积的变化 ;射线频率与生态因素无显著相关 ,表明该类指标是一个较稳定的性状。Fagus lucida L. distributed in Mountain Fanjingshan, Guizhou, China was used to explore ecological patterns in plant anatomy and their relationship with ecological factors, by applying climatic variables and multi-statistical analysis. As the results, with increasing temperature, all the anatomical characters of leaves, stomatal size of leaf surface, and vessel diameter and fiber length of woods showed a decreasing tendency, while stomatal density of leaf, and vessel frequency and ray height of woods increased. As coldness index and moisture index increased, all the anatomic characteristics of leaf, stomatal size, and vessel length, and width and fiber length of wood displayed a sharp increase, whereas stomatal density, vessel frequency and ray height decreased. The stepwise regressive analysis showed that moisture variable is a limiting factor for controlling anatomic characters of leaves, and vessel frequency, vessel length and width, and fiber length of woods, precipitation for stomatal density, and temperature for stomatal size. No significant correlation of the rays frequency to climatic variables indicates that the rays frequency is a stable anatomical character.

关 键 词：生态解剖 气候因子 生态格局 亮叶水青冈 

分 类 号：Q948.11[生物学—植物学]