摘要
利用中肋骨条藻(Skeletonema costatum)和球形棕囊藻(Phaeocystis globosa)两种海洋微藻为研究材料,设置以摇床震荡模拟风浪扰动培养处理与摇床静止培养处理,着重测定藻液光密度(OD680)、比生长速率、藻体生物量和叶绿素含量等生理生化指标,研究风浪扰动对海洋微藻细胞增殖的作用效应,比较不同海洋微藻对风浪扰动的响应差异,探讨风浪扰动对海洋微藻生消的影响。结果表明,模拟风浪扰动处理显著地促进了中肋骨条藻和球形棕囊藻的细胞增殖:模拟风浪扰动处理下中肋骨条藻和球形棕囊藻的最大生长速率分别为0.77/d和0.54/d,而静止培养处理下中肋骨条藻和球形棕囊藻的最大生长速率分别只有0.44/d和0.32/d。同样地,中肋骨条藻和球形棕囊藻在模拟风浪扰动处理下的生物量(分别为277.78和435.56 mg/L)和叶绿素a含量(分别为1.68和3.63 mg/L)也显著高于他们在静止培养处理下的生物量(分别为82.22和50.00 mg/L)和叶绿素a含量(分别为1.23和0.91 mg/L)。结果揭示,适宜的风浪扰动有利于海洋微藻的生长繁殖,进而可能会促成海洋赤潮的爆发;不同海洋微藻对扰动的响应性差异,可能是引起海洋生态系统中赤潮藻群落动态更替变化的一个重要因素。
The effect of wave disturbance on the growth of Skeletonema costatum and Phaeocystis globosa was investigated under the shaking and static conditions by analyzing some parameters including algal optical density （ OD680 ） , specific growth rate, biomass and chlorophyll a content. The results showed that the shaking significantly promoted the cell proliferation of S. costatum and P. globosa as compared with static treatment. The highest specific growth rates of S. costatum and P. globosa were 0.77/d and 0.54/d under shaking condition, respectively, which were markedly higher that those under static condition （ 0.44/d and 0.32/d, respectively）. Moreover, biomass and chlorophyll a were greatly increased under the shaking condition in contrast to static condition. Our findings showed that the wave disturbance in marine environment may facilitate the growth and proliferation of marine microalgae, and the different responses of microalgal species to the wave disturbance may be an important factor responsible for dynamic succession of microalgal communities in marine ecosystem.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2011年第4期473-476,共4页
Marine Environmental Science
基金
国家自然科学基金(40876074)
关键词
风浪
中肋骨条藻
球形棕囊藻
赤潮
模拟研究
wave
Skeletonema costatum
Phaeocystis globosa
red tide
simulation study
