| Ecological functions of ciliated protozoa in marine ecosystem：effects on accumulation of ambient ammonia |
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| 作者姓名： | XuHenglong SongWeibo ZhuMingzhuang WangMei MaHonggang HuXiaozhong |
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| 作者单位： | [1]TheLaboratoryofProtozoology,KLM,OceanUniversityofChina,Qingdao266003,P.R.China／／DepartmentofBiology,LiaochengUniversity,Liaocheng252059,P.R.China [2]TheLaboratoryofProtozoology,KLM,OceanUniversityofChina,Qingdao266003,P.R.China |
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| 基金项目： | theHighTechnologyResearchandDevelopmentProgrammeofChina (No .2 0 0 2AA64 80 10 )andtheNationalNaturalScienceFoundationofChina (No .40 2 0 60 2 1) |
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| 摘 要： | Effects of ciliated protozoa, Euplotes vannus and Uronema marinum, on accumulation of ammonia in marine waters are detected using experimental ecological method, in order to reveal the contributions and functions of ciliates to the marine ecosystem. During experiments, the concentrations of ammonia-N, and the densities of ciliates and bacteria are measured. The results reveal that ciliates can change the procedure of ammonia accumulation by their grazing activity, and maintain ambient ammonium at low levels through interrupting the stationary phase of bacteria population growth and enhancing their growth and metabolism. The present work confirms that ciliates, as bacteria-predators, play positive roles in maintaining and improving water quality in marine ecosystems, especially in intensive mariculture biotopes.
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| 关 键 词： | 氨 海洋生物养殖 生态系统 分解代谢作用 蛋白质 毒性 细胞 |
Ecological functions of ciliated protozoa in marine ecosystem:effects on accumulation of ambient ammonia |
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| XuHenglong SongWeibo ZhuMingzhuang WangMei MaHonggang HuXiaozhong.Ecological functions of ciliated protozoa in marine ecosystem:effects on accumulation of ambient ammonia[J].High Technology Letters,2005,11(1):101-106. |
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| Authors: | XU Henglong SONG Weibo ZHU Mingzhuang Wang Mei MA Honggang Hu Xiaozhong |
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| Abstract: | Effects of ciliated protozoa, Euplotes vannus and Uronema marinum, on accumulation of ammonia in marine waters are detected using experimental ecological method, in order to reveal the contributions and functions of ciliates to the marine ecosystem. During experiments, the concentrations of ammonia-N, and the densities of ciliates and bacteria are measured. The results reveal that ciliates can change the procedure of ammonia accumulation by their grazing activity, and maintain ambient ammonium at low levels through interrupting the stationary phase of bacteria population growth and enhancing their growth and metabolism. The present work confirms that ciliates, as bacteria-predators, play positive roles in maintaining and improving water quality in marine ecosystems, especially in intensive mariculture biotopes. |
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| Keywords: | Euplotes vannus Uronema marinum marine ciliates ammonia mariculture experimental ecology |
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