| An ecological study on dynamics of toxic Microcystis blooms in a eutrophic park pond, Wuhan, China |
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| 作者姓名： | CHENG Kai ZHAO Yijun XU Min YIN Jun XIONG Qin ZHOU Jinchen WANG Yuzhen ZHANG Wei WANG Jinwang LIU Zhaoyin WANG Furong |
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| 作者单位： | College of Life Science' Central China Normal University' Wuhan 430079' China,College of Life Science' Central China Normal University' Wuhan 430079' China,College of Life Science' Central China Normal University' Wuhan 430079' China,College of Life Science' Central China Normal University' Wuhan 430079' China,College of Life Science' Central China Normal University' Wuhan 430079' China,College of Life Science' Central China Normal University' Wuhan 430079' China,College of Life Science' Central China Normal University' Wuhan 430079' China,College of Life Science' Central China Normal University' Wuhan 430079' China,College of Life Science' Central China Normal University' Wuhan 430079' China,College of Life Science' Central China Normal University' Wuhan 430079' China,College of Life Science' Central China Normal University' Wuhan 430079' China |
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| 基金项目： | 国家自然科学基金，湖北省自然科学基金，Wuhan Funding Programme of Young Scientists |
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| 摘 要： | The results of ecological investigation of Microcystis blooms and their toxicity in a eutrophic park pond ( where the annual average of total nitrogen and total phosphorus was 6.1 mg'L-1 and 1. 79 mg'L-1. respectively) are presented. The blooms were mainly contributed by M. aeruginosa occurring in the period from May to October when water temperature ranged from 16 to 33 °C . Three remarkable growth peaks of Microcystis during the period were observed with chlorophyll a level of 0. 73 mg*L-1. 44 mg*L-1. and 1. 30 mg'L-1. respectively. The blooms were independent of phosphorus, but highly dependent on ammonium. A level of ammonium of 9. 5 mg'L-1 could trigger the outbreak of the bloom, while that below 0. 89 mg'L-1 could inhibit its formation. In other words, ammonium in higher concentrations could promote blooming, while that in lower concentrations could be inhibitory. Microcystis toxicity tended to increase with the blooming process, but the toxic peaks lagged behind their corresponding growth peaks.
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| 关 键 词： | Microcystis bloom microcystin environmental factors |
An ecological study on dynamics of toxic Microcystis blooms in a eutrophic park pond, Wuhan, China |
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| CHENG Kai,ZHAO Yijun,XU Min,YIN Jun,XIONG Qin,ZHOU Jinchen,WANG Yuzhen,ZHANG Wei,WANG Jinwang,LIU Zhaoyin,WANG Furong.An ecological study on dynamics of toxic Microcystis blooms in a eutrophic park pond, Wuhan, China[J].Progress in Natural Science,2002,12(1):30-35. |
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| Authors: | CHENG Kai ZHAO Yijun XU Min YIN Jun XIONG Qin ZHOU Jinchen WANG Yuzhen ZHANG Wei WANG Jinwang LIU Zhaoyin Wang Furong |
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| Affiliation: | College of Life Science, Central China Normal University, Wuhan 430079, China |
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| Abstract: | The results of ecological investigation of Microcystis blooms and their toxicity in a eutrophic park pond ( where the annual average of total nitrogen and total phosphorus was 6.1 mg'L-1 and 1. 79 mg'L-1. respectively) are presented. The blooms were mainly contributed by M. aeruginosa occurring in the period from May to October when water temperature ranged from 16 to 33 °C . Three remarkable growth peaks of Microcystis during the period were observed with chlorophyll a level of 0. 73 mg*L-1. 44 mg*L-1. and 1. 30 mg'L-1. respectively. The blooms were independent of phosphorus, but highly dependent on ammonium. A level of ammonium of 9. 5 mg'L-1 could trigger the outbreak of the bloom, while that below 0. 89 mg'L-1 could inhibit its formation. In other words, ammonium in higher concentrations could promote blooming, while that in lower concentrations could be inhibitory. Microcystis toxicity tended to increase with the blooming process, but the toxic peaks lagged behind their corresponding growth peaks. |
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| Keywords: | Microcystis bloom microcystin environmental factors |
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