有害赤潮鞭毛藻Gymnodinium nagasakienseの増殖におよぼす水温,塩分および光強度の影響
有害赤潮鞭毛藻Gymnodinium nagasakienseの増殖におよぼす水温,塩分および光強度の影響
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DOI：
10.2331/suisan.55.2029
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发表时间：
1989-11
影响因子：
0.4
通讯作者：
峰生 山口;凡夫 本城
中科院分区：
文献类型：
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作者：
峰生 山口;凡夫 本城
从濑户内海西段的尾那田海域采集到一种有毒赤潮鞭毛虫长崎裸藻Gymatriiniumnagasakiense（甲藻纲）。采用无菌培养的方法，研究了温度、盐度和光照对该菌生长的影响，以评价这些因子对该菌自然种群动态的相对重要性。G.在辐照度大于10μE/m2/s时，nagasakiense的辐射强度最大，在110μE/m2/s时达到饱和。在25种不同的温度（10 ~ 30°C）和盐度（10 ~ 30‰）组合下，在饱和光照条件下，研究了该鞭毛虫的生长情况。生长发生在10至30°C的温度和15至30‰的盐度。在25°C和25‰的组合中观察到最高的生长速率。在最适温度下，生长的耐受盐度范围相对较宽，在次适温度下，生长的耐受盐度范围缩小到一个更窄的范围。统计检验表明，温度和盐度对生长的影响是相互作用的。本研究表明，G.长崎藻是广温广盐性生物。这些生理特征可能使它们能够作为运动细胞忍受冬季，而这些运动细胞又作为夏季赤潮的种子种群。
The noxious red tide flagellate Gymnodinium nagasakiense (Dinophyceae) was collected from Suo-Nada, in the western section of Seto Inland Sea. The effects of temperature, salinity and irradiance on growth of this organism were examined using axenic culture to evaluate the relative importance of these factors on dynamics of natural populations. The growth of G. nagasakiense was observed at the irradiance more than 10μE/m2/s and saturated at 110μE/m2/s. The growth of the flagellate was examined in 25 different combinations of temperature (10 to 30°C) and salinity (10 to 30‰) under saturated irradiance. Growth occurred at temperatures from 10 to 30°C and at salinities from 15 to 30‰. The highest growth rate was observed in the combination of 25°C and 25‰. The tolerable salinity range of growth was relatively wide at optimum temperature and was reduced to a much narrower range at suboptimal temperatures. A statistical test indicates that temperature and salinity interact in their influence on growth. The present study reveals that G. nagasakiense is an eurythermal and euryhaline organism. These physiological characteristics presumably allow them to endure the winter as motile cells, which in turn act as the seed population for the summer red tide.