大鹏湾海水环境要素与反曲原甲藻增殖的灰关联模型

Analysis of grey models between the environmental essential parameters of seawater and the growth of Prorocentrum sigmoides Bohm in Dapeng Bay,South China Sea

通过反曲原甲藻种群增殖态势与环境要素的比较，建立关联度的排列顺序，运用灰色系统理论建立灰色模型｛ＧＭ（１，ｎ）｝。采用的方法是根据关联空间、光滑离散函数等概念，定义了灰导数和灰微分方程，进而用离散数据列建立灰色微分方程的动态模型。其结果是，浮游动物、ＤＯ、Ｆｅ和Ｍｎ对反曲原甲藻种群增殖态势具有密切的相关性。

The relation between the growth of Prorocentrum sigmoides Bohm and the environ-mental essential paraxneters of seawater were studies. According to the comparisons between theenvironmental essential parameters of seawater, the grey models were built using the grey systemtheory. Using mathematical basis of the relation space theory, and the smcoth function concep-tion , grey deriyative and grey differential equation were defined. The dynamic models of the greydifferential equation were buih using the discrete data. The calculation results indicated that zoo-planktons, dissolved oxygen, Fe and Mn were the most important parameters.