淡水湖泊藻類模型模擬.pdf

1、南京師范大學(xué)碩士學(xué)位論文淡水湖泊藻類模型模擬姓名：趙秀梅申請學(xué)位級別：碩士專業(yè)：數(shù)學(xué)；應(yīng)用數(shù)學(xué)指導(dǎo)教師：崔景安2009-05-05AbstractAs we know, since the mid-20th century, with the rapid development of in-dustrial and agricultural production, the eutrophication of inland water b

2、odiesbecoming more and more serious.We use the non-traditional biomanipulation method to establish a modelwhich is fish feed on algae.By analyzing the existence and stability of the equi-librium, we show that fish can ma

3、ke algae biomass remained at a lower levelunder certain conditions , in other words,fish can control the occurrence of waterbloom.The simulation of algae biomass shows that reduce the phosphorus flowsis a good method to

4、control the occurrence of water bloom.Through the introduc-tion of the temperature, we show that when the temperature is higher than theoptimal temperature for algae growth, algae biomass increases with temperatureincrea

5、sing; when the temperature near the optimal temperature for fish growth,it can be well control the algae biomass.Key words:non-traditional biomanipulation method,eutrophication, algae,fish, temperature, phosphorus flows.