环境因子对海南粗榧幼苗种群构件结构的生态效应  

Ecological Effects of Different Environmental Factors on the Modular Structure of the Young Tree Population of Cephalotaxus mannii

作　　者：付永川[1,2] 向志强[1,2] 郭力华 刘玉成[1,2] 杜道林[1,2] 

机构地区：[1]西南师范大学生命科学系 [2]海南师范学院生物系

出　　处：《海南大学学报（自然科学版）》1999年第1期64-69,共6页Natural Science Journal of Hainan University

基　　金：国家自然科学基金

摘　　要：以构件理论为基础，运用灰色关联度分析技术，对海南粗榧幼苗种群构件结构与环境因子间的关联度进行了分析．结果表明：一级枝叶系统、当年生枝叶系统受环境影响较大，而二级枝叶系统对于环境变化的反应较为保守；海南粗榧对土壤湿度、土壤中直径０．２５～１ｍｍ的砂粒含量和群落透光度的变化反应敏感，而受土壤中有效磷含量的影响较小，其余环境因子对海南粗榧幼苗种群的影响介于上述因子之间，对该物种的保护要严格保证它所需要的阴湿生态环境．Based on the theory of modularity,the correlation between the environmental factors and the modular structures in the population of young Cephalotaxus mannii is studied by using the analysis of grey relatedness degree.The results show that the first grade branch leaf system and the current growth branch-leaf system are greatly affected by the ecological factors,but the second grade branch leaf system is conservative to the changes of the environmental factors;the population of young C.mannii is sensitive to the soil humidity,the content of sand whose diameter is 0.25～1.00 mm in soil and the community transparence,while it is less affected by the content of effective phosphorus in soil,and the level that the other factors affect the population is between the above former three and latter one.The shady and moist habitat should be guaranteed in order to conserve the rare and endangered species.

关 键 词：海南粗榧 种群 构件 生态效应 环境因子 粗榧 

分 类 号：S791.480.2[农业科学—林木遗传育种] Q949.666[农业科学—林学]