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| 单生卵囊藻对DIC的利用及其对CaCO3沉积影响的研究 | |
| 引用本文： | 刘彦,张金流,何媛媛,孙海龙,刘再华.单生卵囊藻对DIC的利用及其对CaCO3沉积影响的研究[J].地球化学,2010,39(2):191-196. |
| 作者姓名： | 刘彦 张金流 何媛媛 孙海龙 刘再华 |
| 作者单位： | 1. 中国科学院地球化学研究所,环境地球化学国家重点实验室,贵州,贵阳,550002 2. 广西师范大学生命科学学院,广西,桂林,541004 3. 中国科学院地球化学研究所,环境地球化学国家重点实验室,贵州,贵阳,550002;中国地质科学院,岩溶地质研究所国土资源部岩溶动力学重点实验室,广西,桂林,541004 |
| 基金项目： | 中国科学院百人计划项目，国家自然科学基金 |
| 摘 要： | 以生长在钙华池中的单生卵囊藻（Oocystis solitaria Wittr）为研究对象，利用pH漂移方法，探讨了封闭系统中单生卵囊藻在岩溶水和非岩溶水环境下对溶解无机碳（DIC）利用及其对水体Ca^2＋沉积影响的差异。结果表明，单生卵囊藻在低CO2浓度时，通过胞外碳酸酐酶的催化，以HCO3^-作为无机碳源进行光合作用。在岩溶水环境下单生卵囊藻DIC利用能力要高于非岩溶水环境（4．78倍），而在此过程中对水体中Ca^2＋沉积的影响也更高（2．13倍）。在岩溶水（非岩溶水）环境下，有42．6％（8．9％）的Ca^2＋通过物理化学效应以CaCO3形式沉积，其余Ca^2＋可能被藻体生长而吸收利用．． |
| 关 键 词： | CaCO3 沉积 无机碳利用 单生卵囊藻 岩溶水 非岩溶水 |
The utilization of dissolved inorganic carbon by Oocystis solitaria Wittr and its influence on the precipitation of calcium carbonate |
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| LIU Yan,ZHANG Jin-liu,HE Yuan-yuan,SUN Hai-long , LIU Zai-hua, .State Key Laboratory of Environmental Geochemistry.The utilization of dissolved inorganic carbon by Oocystis solitaria Wittr and its influence on the precipitation of calcium carbonate[J].Geochimica,2010,39(2):191-196. | |
| Authors: | LIU Yan ZHANG Jin-liu HE Yuan-yuan SUN Hai-long LIU Zai-hua State Key Laboratory of Environmental Geochemistry |
| Institution: | LIU Yan1,ZHANG Jin-liu1,HE Yuan-yuan3,SUN Hai-long1 and LIU Zai-hua1,2 1.State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550002,China,2.Karst Dynamics Laboratory,MLR,Institute of Karst Geology,CAGS,Guilin 541004,3.College of Life Science,Guangxi Normal University |
| Abstract: | The difference in dissolved inorganic carbon (DIC) utilization and calcium carbonate precipitation by Oocystis solitaria Wittr which grown in closed systems of karst water and non-karst water was investigated by using free pH-drift method. The results show that the HCO_3~- is the carbon resource of Oocystis solitaria Wittr photosynthesis catalyzed by carbonic anhydrase (CA), at low CO_2 concentration. The DIC utilization and calcium carbonate precipitation by Oocystis solitaria Wittr were 2 and 4 times higher in karst water than in non-karst water, respectively. About 42. 6% and 8.9% of calcium ions was precipitated as calcium carbonate in karst and non-karst water via physiochemical effect, respectively and the remaining was utilized by Oocystis solitaria Wittr for its growth. |
| Keywords: | calcite precipitation inorganic carbon utility Oocystis solitaria Wittr karst water non-karst water |
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