Analysis of grey incidence between density of Noctiluca scintillans and factors

KEYWORD: Noctiluca scintillans, factors, analysis of grey incidence, coastal waters of Hebei prov- ince ABSTRACT: The relation of the density of Noctiluca scintillans and environmental factors was stu- died. The grey incidence and relational degree of reference sequence and several comparison series were estimated. The results indicated that zooplanktons, Active phosphate Chemical oxygen de- mand(COD) were the important factors.