船舶压载舱黑暗条件对青岛大扁藻种群的生态影响  

Influence of dark conditions of ballast tanks on the population of Platymonas helgolandica

作　　者：沈辰 李金杰 王琼 薛俊增 SHEN Chen;LI Jinjie;WANG Qiong;XUE Junzeng(College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China;Centre for Research on the Ecological Security of Ports and Shipping, Shanghai 201306, China)

机构地区：[1]上海海洋大学海洋生态与环境学院,上海201306 [2]上海海洋大学港航生态安全研究中心,上海201306

出　　处：《上海海洋大学学报》2018年第3期350-357,共8页Journal of Shanghai Ocean University

基　　金：上海市科委科研计划项目(17DZ1202905);上海市科委研发平台专项(16DZ2293800);上海市自然基金(15ZR1420900);海洋工程装备检测试验技术国家工程试验室建设项目[沪发改高技(2016)99号]

摘　　要：为阐明船舶压载舱的黑暗密闭环境对绿藻生长的影响,以青岛大扁藻为模式生物,设置不同的初始密度(5 cells/m L、50 cells/m L、5×10~2cells/m L、5×10~3cells/m L和5×104~cells/m L),研究青岛大扁藻在黑暗条件下的相对生长抑制率及在不同生长期和初始密度处理下的种群响应。并对黑暗处理后的青岛大扁藻进行光照恢复研究,探索在不同的起始密度下,未经黑暗与经黑暗处理后的扁藻种群密度变化的差异。结果表明,经过黑暗处理的低密度(3 cells/m L)的青岛大扁藻在光恢复两周后仍然可以达到较高的种群密度水平(1×10~3);经黑暗处理的青岛大扁藻在光恢复初始密度为3及3×10~4cells/m L时的种群恢复能力较未经黑暗处理的弱,且存在显著差异(P<0.05)。In order to evaluate the influence of dark enclosed environment of ship ballast tanks on the growth of green algae,the study was carried out at five different initial densities（ 5 cells/m L,50 cells/m L,5 × 10^2 cells/m L,5 × 10^3 cells/m L,5 × 10^4 cells/m L） to investigate the relative growth inhibition rate of Platymonas helgolandica under dark conditions and the population response at different growth periods and initial density treatments. The light recovery study of dark-treated Platymonas helgolandica during the dark period was conducted to explore the differences in the population density changes of Platymonas helgolandica without darkness and after darkness at different initial densities. The results showed that after the dark-treatment,lowdensity（ 3 cells/m L） Platymonas helgolandica can still reach a higher population density（ 1 × 10^3 cells/m L）after two weeks of light recovery. For densities of 3 and 3 × 10^4 cells/m L,the population resilience of the dark-treated Platymonas helgolandica was weaker than that of the untreated group and there was a significant difference（ P〈0. 05）.

关 键 词：船舶压载舱 黑暗 青岛大扁藻 生长抑制率 种群恢复 

分 类 号：Q89[生物学] S917[农业科学—水产科学]