濒危植物桫椤种群格局的分形特征  

Fractal Characteristics of Pattern of Endangered Plant Alsophila spinulosa Population

作　　者：宋萍[1] 洪伟[1] 吴承祯[1] 封磊[2] 范海兰[1] 

机构地区：[1]福建农林大学林学院,福建福州350002 [2]福建农林大学资源与环境学院,福建福州350002

出　　处：《山地学报》2009年第2期195-202,共8页Mountain Research

基　　金：福建省自然科学基金资助项目(B0110026)~~

摘　　要：采用分形理论中的计盒维数、信息维数和关联维数对福建省瓜溪桫椤自然保护区内不同地段桫椤种群格局的分形特征进行比较分析。结果表明,8个地段的桫椤种群在空间占据、格局强度和个体空间相关性等方面存在着不同的尺度变化和分形特征,种群格局计盒维数值在0.3132～1.1189之间,大小次序为Q3>Q6>Q7>Q1>Q2>Q4>Q5>Q8,信息维数在0.3031～1.078之间,大小次序为Q3>Q7>Q6>Q1>Q2>Q5>Q8>Q4,关联维数在0.7450～1.1453之间,大小次序为Q3>Q6>Q8>Q1>Q5>Q7>Q2>Q4;分形维数谱显示,地段Q1、Q2、Q3、Q6和Q7的桫椤种群空间结构特征相似,地段Q4、Q5与Q8的种群相似。The fractal characteristics of pattern of Alsophila spinulosa population in different sites in Guaxi Alsophila spinulosa Nature Reserve of Fujian Province was analyzed by applying box-counting dimension, information dimension and correlation dimension in fractal theory. The results indicated that Alsophila spinulosa populations in 8 sites showed different scale variation and fractal trait on spatial occupation, pattern intensity and spatial correlation of individuals. The box-counting dimension ranged from 0. 313 2 to 1. 118 9 and the order of that was Q3 〉 Q6 〉 Q7 〉 Q1 〉 Q2 〉 Q4 〉 Q5 〉 Q8, information dimension from 0. 303 1 to 1. 078 and the order of that Q3 〉 Q7 〉 Q6 〉 Q1 〉 Q2 〉 Q5 〉 Q8 〉 Q4 and the correlation dimension from 0. 745 0 to 1. 145 3 and the order of that Q3 〉 Q6 〉 Q8 〉 Q1 〉 Q5 〉 Q7 〉 Q2 〉 Q4. The spectrum of fractal dimension showed that spatial structure characteristics of those populations in sites Q1, Q2, Q3, Q6 and Q7 were similar, the same to those in sites Q4, Q5 and Q8.

关 键 词：桫椤 种群格局 分形 

分 类 号：Q948[生物学—植物学]