摘要
应用分形几何理论和方法，对祁连山青海云杉种群沿海拔梯度空间分布格局的分形特征进行了分析。结果表明，在2700-3300m的海拔，计盒维数分别为：1．706、1．880、1．927、1．640、1．465、1.219，表明其水平占据空间的能力很强，信息维数分别为：1．660、1．684、1．805、1.761、1．470、1．359、1．013，表明其结构较复杂，格局强度较高。计盒雏数与信息雏数沿海拔梯度的变化趋势基本一致，其值随海拔升高而增大，在海拔2900m时达到最大值，之后随海拔的继续升高，其值又开始下降，在海拔3300m时达到最小值。
Fractal properties of spatial pattern of Picea crassifolia population at different altitudes have been studied by fractal theory . The box dimension respectively was 1. 706,1. 880, 1. 927, 1. 640, 1. 465 and 1. 219 respectively from 2 700 m to 3 300 m, which showed that the population occupted the horizontal space powerfully. The information dimension respectively was 1. 660, 1. 684,1. 805,1. 761,1. 470, 1. 359 and 1. 013 from 2 700 m to 3 300 m. Which suggested that the structure was complex and the pattern intersity was higher described. There was a same change of box-counting dimension and information dimension at different altitudes. Values of box-counting dimension and information dimension from 2 700 m to 2 900 m increased with the increasing of altitude, reached the maxmum value at 2 900 m, and then began to reduce with increasing of altitude, got a minimun value 3 300 m.
出处
《西北林学院学报》
CSCD
北大核心
2006年第2期64-66,共3页
Journal of Northwest Forestry University
基金
国家自然科学基金项目(30230290)
国家重点野外科学观测试验站建设项目
国家林业局"九五"项目(96-30)
"十五"(2001-09)重点项目
关键词
青海云杉
种群分布格局
计盒维数
信息维数
海拔
Picea crassifolla
population distribution pattern
box-counting dimension
information dimension
altitude
