基于营养盐的渤海湾海域中肋骨条藻赤潮危险度评估

Hazard degree assessment of Skeletonema costatum red tide based on nutrient in Bohai Bay

为了定量得到赤潮危险度评估结果,在渤海湾赤潮重点监控区现场实测数据的基础上,采用已建立的基于营养盐的中肋骨条藻生长耐受性模型及赤潮危险度评估方法,评估中肋骨条藻生长的耐受性特征及其引发赤潮的危险度,并对评估方法的适用性和合理性进行验证。结果表明,在监测期间(2006年7月29日至8月1日),中肋骨条藻赤潮危险度随着监测时间的变化呈先增大后减小的趋势,且8月1日中肋骨条藻赤潮危险度达到最大,为0.163。评估结果与实测藻类细胞数的变化趋势相一致,表明建立的赤潮危险度评估方法具有一定的可行性和可靠性。

To obtain the results of hazard degree assessment quantitatively,according to the in-situ data of the key monitoring area of red tide in Bohai Bay,the Skeletonema costatum growth tolerance model and the hazard degree assessment methods were used to assess the hazard degree of S.Costatum red tide,and verified the applicability and rationality of the assessment methods.The results showed that the hazard degree of S.costatum red tide with the increase of monitoring period first increased and then decreased during the monitoring period,and the hazard degree reached the maximum value（0.163） in August 1,2006.The assessment results of red tide hazard degree were consistent with the changes of cell density of S.costatum,the results showed that the established method of hazard degree assessment of red tide had some feasibility and reliability.