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Volume 34 Issue 1
Jan.  2015
Article Contents

Citation:

Effects of nitrogen sources on the growth and interspecific competition of Phaeodactylum tricornutum, Dunaliella salina and Karenia mikinotoi

  • Received Date: 2014-01-08
    Accepted Date: 2014-03-21
  • In this study, effects of three different nitrogen sources on the growth and interspecific competition of Phaeodactylum tricornutum, Dunaliella salina and Karenia mikimotoi were studied in the monoculture and mixed culture, respectively. The results indicated that when the three microalgae were in monoculture, the maximum final cell density of P. tricornutum was recorded in urea treatment, in which the average specific growth rate of P. tricornutum that reached 0.63 /d was the highest in all treatments. The final cell densities of D. salina and K. mikimotoi in NaNO3 and urea treatments were both higher than those observed in NH4Cl treatment, but there was no significant difference between the former two treatments, and the higher values of the average specific growth rates of D. salina and K. mikimotoi were also detected in the former two treatments. When the three microalgae were in mixed culture, the higher final cell densities of P. tricornutum were detected in NaNO3 and urea treatments, accounting for 62% and 65% of the total cell densities, respectively. And the average specific growth rates of P. tricornutum in NaNO3 and urea treatments were significantly higher than that observed in NH4Cl treatment. The maximum final cell density of D. salina that accounted for 58% of total cell density was recorded in NH4Cl treatment, in which the average specific growth rate was significantly higher than those observed in other two treatments. The growth of K. mikimotoi under three different nitrogen sources were all inhibited to a great extent, the final cell density which only accounted for 1% of the total cell density and the average specific growth rate that reached 0.058 /d in NH4Cl treatment were both the lowest in all treatments.
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  • [1] 陈卫民,戴树桂,张清敏.亚硝酸盐对铜绿微囊藻和四尾栅藻生长和竞争的影响[J].重庆大学学报,2010,33(9):86-91.[6]汪芳,葛蔚,柴超,等.不同营养条件对东海原甲藻和中肋骨条藻竞争参数的影响[J].应用生态学报,2012,23(5):1393-1399.[10]万 蕾,朱 伟,赵联芳.氮磷对微囊藻和栅藻生长及竞争的影响[J].环境科学,2007,28(6):1230-1235.[11]李瑞香,朱明远,王宗灵,等.东海两种赤潮生物种间竞争的围隔实验[J].应用生态学报,2003,14(7):1049-1054.[12]谢志浩,肖 慧,蔡恒江,等.不同起始数量对赤潮异弯藻和东海原甲藻种间竞争的影响[J].海洋环境科学,2008,27(5):462-465.[16]王培磊,刘明河,张学成,等.不同氮源对盐生杜氏藻生长和细胞生化组成的影响[J].海洋湖沼通报,2007(1): 45-48.[17]吕颂辉,黄凯旋.米氏凯伦藻在三种无机氮源的生长情况[J].生态环境,2007,16(5): 1337-1341.[18]王仁君,唐学玺,冯 蕾,等.鼠尾藻对赤潮异弯藻和中肋骨条藻的抑制作用[J].应用生态学报,2006,17(12):2421-2425.[19]马 龙.利用经济微藻的竞争作用防治米氏凯伦藻(Karenia mikimotoi)赤潮的初步研究[D].青岛: 中国海洋大学,2008: 21-39.[22]黄凯旋.米氏凯伦藻的氮营养生理生态研究[D].广州:暨南大学,2007:13-24.[23]李正锋.米氏凯伦藻的磷营养生理生态研究[D].广州:暨南大学,2007:20-26.
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Effects of nitrogen sources on the growth and interspecific competition of Phaeodactylum tricornutum, Dunaliella salina and Karenia mikinotoi

  • 1. The Key Laboratory of Mariculture of Ministry of Education, Ocean University of China, Qingdao 266003, China

Abstract: In this study, effects of three different nitrogen sources on the growth and interspecific competition of Phaeodactylum tricornutum, Dunaliella salina and Karenia mikimotoi were studied in the monoculture and mixed culture, respectively. The results indicated that when the three microalgae were in monoculture, the maximum final cell density of P. tricornutum was recorded in urea treatment, in which the average specific growth rate of P. tricornutum that reached 0.63 /d was the highest in all treatments. The final cell densities of D. salina and K. mikimotoi in NaNO3 and urea treatments were both higher than those observed in NH4Cl treatment, but there was no significant difference between the former two treatments, and the higher values of the average specific growth rates of D. salina and K. mikimotoi were also detected in the former two treatments. When the three microalgae were in mixed culture, the higher final cell densities of P. tricornutum were detected in NaNO3 and urea treatments, accounting for 62% and 65% of the total cell densities, respectively. And the average specific growth rates of P. tricornutum in NaNO3 and urea treatments were significantly higher than that observed in NH4Cl treatment. The maximum final cell density of D. salina that accounted for 58% of total cell density was recorded in NH4Cl treatment, in which the average specific growth rate was significantly higher than those observed in other two treatments. The growth of K. mikimotoi under three different nitrogen sources were all inhibited to a great extent, the final cell density which only accounted for 1% of the total cell density and the average specific growth rate that reached 0.058 /d in NH4Cl treatment were both the lowest in all treatments.

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