生物多样性模型研究

通过１９４９年以来在各种出版物上已发表的２７种生物多样性模型分析发现,大多数多样性模型在理论上是不完善的。例如,被应用最广泛的Ｓｈａｎｎｏｎ模型至少有４个缺点：①没有考虑物种间生物量的区别；②如果要使用Ｓｈａｎｎｏｎ模型,每种物种的个数或每种景观单元的个数不能小于１００；③模型中没有隐含面积参数；④不能够表达多样性的丰富性方面。因此,作者推举了一种理论上完善的综合生物多样性模型,并为了满足实际操作和生物多样性自相似性研究的需要,对其中的一些参数进行了修正

Studies on models for Biodiversity

By analyzing 27 models for biological diversity that have been published since 1949,it is found out that most of the models are not theoretically complete.For instance,the widely used Shannon model has at least 4 drawbacks:(a)it does not give a consideration of the differences of biomass among various species;(b)individuals of every species or the number of ecotopes of every ecotope type must be more than 100 if the Shannon model is used;(c)the parameter of area is not implied in the Shannon model; and (d)Shannon model can not express the ‘richness' property of diversity.Therefor,we introduced the theoretically complete models for biodiversity,in which some parameters are modified in order to satisfy the requirement of operating these models in different situations and of studying the similarity of the biodiversity.