保安湖莲群丛分布格局分形特征的初步研究
PRELIMINARY STUDIES ON FRACTAL CHARACTER OF HORIZONTAL PATTERN OF ASS.NELUMBO NUCIFERA IN BAOAN LAKE
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摘要: 应用非线性科学中的分形几何理论,以保安湖扁担塘湖汊中的莲群丛为对象,研究该群丛小尺度水平格局的分形特征。主要应用计盒维数和信息维数公式计算群丛中莲种群和菱种群的个体分布格局的分维值,莲的计盒维数为1.92,信息维数为1.88;菱的计盒维数为1.04,信息维数为1.11.表明在采样区莲的空间占有程度远大于菱,是该时期的优势种,而菱则成为伴生种。莲在各尺度上的分布较均匀。最后讨论了莲的分维值在连续样方上的变化。Abstract: We used the fractal geometric theory of non-linea r science, studying the fractal character of the horizontal pattern of Ass.Nelumbo nucifera in Baoan Lake. Methods used to calculate fractal dimension valu es are box-dimension and information dimension. The results showed that the diff erence between in two macrophytes' the distribution of the association. Nelumb o nucifera was the dominant species in August. It was demonstrated that the bo x dimension of distribution of Nelumbo nucifera was 1.92, information dimens ion was 1.88; the box dimension of distribution of Trapa insica was 1.04, in formation dimension was 1.11. This result showed Nelumbo nucifera uniformly distributed at the given scales from 0.5m to 8m. The variety of the fractal dimen sion of Nelumbo nucifera in the sequent samples was discussed.
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Keywords:
- Association of Nelumbo nucifera /
- Fr actal /
- Scale /
- Horizontal pattern /
- Fractal dimension
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