皖西多枝尖山区不同生活型植物种-面积关系研究

Relationships between different life form species and its possessive area in Duozhijian,Dabieshan mountain,west Anhui pronvince

根据皖西大别山多枝尖山区的植物群落调查数据,采用对数函数、幂函数和Logistic 3种模型分别拟合了乔木、灌木和草本植物的种-面积关系。结果表明,大别山多枝尖山区不同生活型植物种-面积关系的形式存在差异,其中乔木植物以Logistic模型拟合效果最好,而灌木植物和草本植物的最优模型均为对数函数模型。生境异质性、扩散限制和区域生态过程是乔木植物种-面积关系的主要影响因素,而灌木和草本植物的种-面积关系受到生长习性以及上层群落结构和生境异质性的共同作用。因而,对种-面积关系的研究需要区分物种生活型。

Using the data from Duozhijian,Dabieshan Mountain in west Anhui province,speciesarea relationships of arbor,shrub and herb species were modeled by logarithmic,power and logistic model,respectively.The results showed that the canopy species fitted logistic model best,while the shrub and herb species fitted logarithmic model.Different types of species area relationship curves indicated the different assemblies of arbor,shrub and herb species.Habitat heterogeneity,dispersal limitation and regional ecological process contributes to the species-area relationship of arbor species,while the species-area relationships of shrub and herb species are influenced by the ecological habits and the jointly effects of habitat heterogeneity and upper community structure.Different life forms and comprehensively analyses were suggested to explore the mechanism of species diversity maintaining using species-area relationships.