赤潮过程中塔玛亚历山大藻(Alexandrium tamareme)C、N稳定同位素组成的变化规律  

Variation of carbon and nitrogen stable isotope composition of Alexandrium tamareme in the process of red tide

作　　者：刘瑀[1] 王海霞[2] 李晓琳[1] 李颖[2] 

机构地区：[1]大连海事大学环境科学与工程学院,辽宁大连116026 [2]大连海事大学航海学院,辽宁大连116026

出　　处：《海洋环境科学》2015年第5期783-787,共5页Marine Environmental Science

基　　金：国家海洋公益项目(2012418012-02);中央高校基本科研业务费专项资金项目(3132015020)

摘　　要：为了探索赤潮监测预防的新思路和方法,本研究选取典型赤潮藻(塔玛亚历山大藻Alexandrium tamareme)作为实验藻种,模拟一次完整的赤潮形成过程,测定重要监测指标(生物量、营养盐浓度)的变化,找出稳定同位素特征值与之相关变化规律。实验结果表明,藻种生长过程可明显分为四个阶段:适应期、对数生长期、稳定生长期及衰亡期;N、P浓度随培养时间呈下降趋势,与生物量的变化有很好的相关性,但在生长过程中几乎不吸收硅酸盐。在一次完整的赤潮发生过程中,C稳定同位素组成(δ13C值)随时间显示出减小趋势,而N稳定同位素组成(δ15N值)值则显示增大趋势。因此,赤潮藻的C和N稳定同位素组成为赤潮监测提供了可能的新指标和新方法。In order to explore a new method for the red tide monitoring, this study selected one of the typical red tide algae,Alexandrium tamareme, as experimental material. We simulated a complete algal bloom process and examined the important monitoring index （biomass, nutrient concentration）, find out the rule of the correlation with stable iso- tope characteristic value. The results show that algae growth process can be obviously divided into four stages ： the ad- aptation period, the logarithmic growth phase, stable growth phase and decline phase;N, P nutrient concentration de- creased with the incubation time, there is a good correlation with the change of biomass in the growth process, but al- most no absorption of silicate. In a complete algal bloom process, the stable carbon isotope composition （δ13 C） shows decrease tendency,while the stable nitrogen isotope composition （δ15 N） reveals increase tendency. Therefore,the sta- ble isotope composition can provide new indexes and possible new methods for the red tide monitoring.

关 键 词：塔玛亚历山大藻 营养盐 稳定同位素 

分 类 号：X171[环境科学与工程—环境科学]