不同无机氮浓度下中肋骨条藻和三角褐指藻生长对生长环境pH的影响  

Effects of growth of Skeletonema costatum and Phaeodactylum tricornutum on medium pH in different initial inorganic nitrogen concentrations

作　　者：苟彬[1,2] 高永利[1] 殷克东[1,3] 蔡卫君[4] 

机构地区：[1]热带海洋环境国家重点实验室(中国科学院南海海洋研究所),广东广州510301 [2]中国科学院研究生院,北京100049 [3]中山大学海洋学院,广东广州510275 [4]美国佐治亚大学海洋科学系,佐治亚州雅典30602

出　　处：《热带海洋学报》2011年第3期82-87,共6页Journal of Tropical Oceanography

基　　金：中国科学院;国家外国专家局创新团队国际合作伙伴计划(KZCX2-YW-T001);中国科学院南海海洋研究所青年基金项目(SQ200815);国家自然科学基金项目(U1033002)

摘　　要：海洋酸化是当前一个严重的环境问题,而海水pH的变化与微藻生长时对溶解无机碳的吸收有关。在室内条件下采用生理生态学方法,研究中肋骨条藻Skeletonema costatum和三角褐指藻Phaeodactylum tricornutum在不同无机氮水平下生长到最大生物量时培养液pH的变化。结果表明,培养液无机氮浓度从10μmol.L-1上升到200μmol.L-1过程中,2种微藻的叶绿素浓度和最终pH均呈上升趋势。培养液pH的增加量与无机氮的消耗量呈正相关关系,培养液pH的增加量与溶解无机碳的消耗量也呈正相关关系。Ocean acidification is a threatening environmental problem.A change of ocean pH is affected by the amount of inorganic carbon that is absorbed by algae.Skeletonema costatum and Phaeodactylum tricornutum were grown in batch culture to study the effects of different inorganic nitrogen concentrations on the change in pH.The results showed that the concentra-tion of chlorophyll a and final pH of the two algae’s media increased with the medium N concentration from 10 to 200μmol.L？1.A significant linear relationship was observed between the change of pH and the consumption of inorganic N and a linear significant relationship was also found between the change of pH and the consumption of inorganic carbon.

关 键 词：PH 无机氮消耗量 中肋骨条藻 三角褐指藻 

分 类 号：P735.2[天文地球—海洋生物学]