生态毒理
王朝晖,梁瑜,姜珊,陈秀梅,李静媚.氮限制对三种赤潮藻生长以及种间竞争效应的影响[J].环境科学学报,2010,30(6):1257-1264
氮限制对三种赤潮藻生长以及种间竞争效应的影响
- Effects of nitrogen limitation on growth and interspecies competition of three harmful algal bloom species
- 基金项目：国家自然科学基金项目(No.40773063,40673062);广东省科技计划项目(No.2007B030200002)
- 作者
- 单位
- 王朝晖
- 1. 暨南大学水生生物研究所, 广州 510632; 2. 热带亚热带水生态工程教育部工程研究中心, 广州 510632
- 梁瑜
- 暨南大学水生生物研究所, 广州 510632
- 姜珊
- 暨南大学水生生物研究所, 广州 510632
- 陈秀梅
- 暨南大学生态学系, 广州 510632
- 李静媚
- 暨南大学生态学系, 广州 510632
- 摘要：为了了解不同类别的赤潮藻类对氮(N)限制的响应,在实验室单独培养以及混合培养条件下,研究了N限制对3种典型赤潮微藻(中肋骨条藻、锥状斯氏藻和海洋卡盾藻)生长的影响.结果显示,N限制对3种赤潮藻类的生长均具有明显影响,其中中肋骨条藻对N限制较为敏感.混合培养体系中,藻细胞生长同时还受到种间竞争的明显抑制;而在3种藻混合培养条件下,种间竞争成为了藻细胞生长的决定性因素,锥状斯氏藻和海洋卡盾藻能对中肋骨条藻的生长能产生协同抑制作用.锥状斯氏藻是一种可形成孢囊的种类,N限制和种间竞争能促进其孢囊的提前形成,并且种间竞争能显著提高孢囊的形成率.
- Abstract：Effects of nitrogen(N)limitation on the growth of three typical algal bloom species:Skeletonema costatum,Scrippsiella trochoidea and Chattonella marina,were investigated in mono-species culture and co-culture under laboratory conditions.Our results showed that Nlimitation influenced the growth of algal cells significantly,and Sk.costatum was the most sensitive to Ndepletion.Interspecies competition was the key factor affecting the growth in co-cultures of the three species.The growth of Sk.costatum was greatly reduced in the co-culture system.For Sc.trochoidea,a cyst forming species,Nlimitation and interspecies competition induced the earlier occurrence of encystment of Sc.trochoidea,and promoted the formation rate of cysts in co-culture systems.
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