Fractal properties of the spatial pattern of Alsophila spinulosa population in Mopangou,Fuling

Abstract

Abstract: Using box dimension of fractal theory,the fractal properties of spatial pattern of Alsophila spinulosa population in Mopangou,Fuling were studied.The results showed that distribution pattern of Alsophila spinulosa population possessed fractal properties.At different altitudes,the box dimension of the horizontal distribution patterns of Alsophila spinulosa populations was different,which closely related to the environmental factors.The box-counting dimensions of Alsophila spinulosa population in six community-types was in order of Symplocos laurina-Lophatherum gracile> Engelhardtia roxburghiana-Debregeasia edulis > Rhus chinensis-Veronicastrum slenostachyum > Macaranga tanarius-Miscanthus sinensis > Quercus fabri-Cyperus compressus>Litsea mollis-Polygonum chinensis.The box dimension reflected the spatial occupation degree of the population.The box dimension of the clumped population was higher than that of the random population.

Key words: Subtropical evergreen broad-leaved forest, Castanopsis fargesii, Seed rain, Spatial and temporal pattern

CLC Number:

Q948.1

SHI Shengyou, GUO Qigao, CHENG Minghao, LIANG Guolu . Fractal properties of the spatial pattern of Alsophila spinulosa population in Mopangou,Fuling[J]. cje, 2005, (5): 581-584.

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