| 摘要: |
| 运用单种培养的方法研究了分别于1987年和1989年采自葡萄牙沿海和德国湾的两种赤潮涡鞭毛藻Alexandrium lusitanicum（A．L．）和Y-100在不同光、温、盐条件下的生长特性。结果表明，在较低温度条件下，藻的生长在较低的光照强度（27 μE/(m2*s)）时就显示了光饱和现象；在较高温度条件下，藻的生长随光照增加而加快。两种藻生长的最适温度随光照强度增加而增加，在低于最适温度条件下生长速率都随温度升高而加快。Y-100在35-20的盐度范围内生长速率无明显差异，在盐度15时生长率降低，在盐度10时藻不再生长。 |
| 关键词: 赤潮 涡鞭毛藻 生长特性 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目，9389008号 |
|
| STUDY ON GROWTH OF TWO, BLOOM-FORMING DINOFLAGELLATES |
|
Zhou Mingjiang1, Yan Tian1, M．Elbrachter2
|
|
1.Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071;2.Biologische Anstalt Helgoland, Germany, 2282 List / Sylt
|
| Abstract: |
| This batch culture study on growth rate, as a function of temperature, light and salinity of two bloom-forming dinoflagellates, Alexandrium lusitanicum (A. L.) and Y-100, isolated in Portugal and Germany in 1987 and 1989, indicated that both dinoflagellates showed saturation of growth at low light intensity of 27μE/(m2*s) under low temperatures, while under higher temperatures the growth rate increases with light intensity. It suggested that in experiments on light-saturated growth of algae, the temperature should be stated to get the comparable results. Maximum growth rates of A. L. and Y-100 appeared at 24 °C-120 μE/(m2*s) and 21°C-120 μE/(m2*s), respectively. Salinity from 35 to 20 had no significant influence on the growth rates of Y-100, while growth reduction and growth inhibition were observed at 15 and 10, respectively. It showed that Y-100 acclimated to the condition of low temperature at low light intensity more easily than A. L. and thus have more potential to form red tides in the North Sea, Europe. The poor growth of Y-100 under lower salinity indicated that Y-100 would rarely form red tides in estuaries. |
| Key words: Red tide, Dinoflagellate, Growth |
