摘要
采用信息维数对武夷山香果树(Emmenopterys henryi)种群进行空间分布格局的分形特征分析,结果表明:香果树种群信息维数值在1.0～1.7,香果树在各种群落中信息维数呈极显著线形相关(P<0.01);不同群落类型的香果树种群间分形特征差异明显,而同一类型内部各样地间差异较小;香果树种群信息维数由高到低依次为:香果树纯林>阔叶林>毛竹林>针阔混交林;香果树信息维数随海拔高度的变化波动幅度较大,香果树在海拔1 300 m左右,信息维数达最大值,格局尺度变化强烈,是香果树种群生存较理想的环境,海拔高于1 400 m或低于1 200 m信息维数较低,种群更新较差。提出了加强保护有结实能力的香果树母树,以促进其自然更新的建议。
Based on the investigation in Wuyishan Nature Reserve,Fujian province,fractal properties of spatial distribution of Emmenopterys henryi population were analyzed by information dimension.The results showed that information-counting dimension of E.henryi population ranged from 1.03 to 1.7,indicating weak ability to expand.Fractal properties had significant difference among different population types,but small among the same communities.Information-counting dimension was as follows： pure stand of E.henryi broadleaved forestmoso bamboo forestbroad leaved-coniferous mixed forest,and had a trend of increase to decrease with the increase of altitude.Information dimension decreased with the age.Proposition was offered to conserve mother trees for promoting natural regeneration.
出处
《浙江林业科技》
北大核心
2010年第2期31-35,共5页
Journal of Zhejiang Forestry Science and Technology
基金
江西省教育厅科技计划项目(GJJ08463)
上饶师范学院科研基金项目(0810)
关键词
香果树
分布格局
信息维数
Emmenopterys henryi
distribution pattern
information dimension
