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Study on the evaluation and treatment of lake eutrophication by means of algae biology

KUANG Qi-jun~1, MA Pei-ming~(1,2), HU Zheng-yu~1,ZHOU Guang-jie~(1,2)(1 Institute of Hydrobiology, The Chinese Academy of Sciences, Wuhan 430072, China; 2 Graduate School, The Chinese Academy of Sciences, Beijing 100039, China)  
The present paper aims to introduce the authors' research on the method of evaluation and treatment of lake eutrophication by means of algae biology. As a matter of fact, with the fast industrialization tendency, lake eutrophication in China is still getting more and more exacerbated for a number of reasons, both human activities and natural factors. Luckily, algae is one of the important organisms in lake eco-system, whose growth is favorable for metabolism and species constitution. In the paper, the authors give a general outline on the application of algae in biologica1 assessment on lake trophic status with detailed information about the indicator of algae in the water bodies of hypertrophication, eutrophication, mesotrophication and olipotrophication. In addition, an example for giving an algal growth potential test, and the corresponding AGP test results. In addition, the authors have also discussed some algal species diversity and synthesis indexes as well as their evaluated standards. In order to figure out the key problems on nutrients excess and algal overgrown in lake eutrophication, a brief introduction about the recent progress on the study of nutrients and algae removal, whose research results about the research field conducted by the authors are also given. In order to protect our lakes against the eutrophication, it is important to draw up a more detailed and functional management rules and regulations on water resources, to strengthen the ecological environment protection of valleys and water areas, and to prohibit strictly the discharge of the wastewater with high concentration of phosphorus and nitrogenous compounds into water bodies.
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