广州市大金钟水库浮游植物与环境因子的关系

对治理并维护运行了1年的大金钟水库进行5次采样实验,研究经修复后的水库中浮游植物的时空变化,并运用相关系数法分析了浮游植物变化与环境因子之间的关系.结果表明:随着水温降低,喜暖性的蓝藻数量急剧减少,与水温呈明显正相关关系(r＝0.986,p<0.05);其他藻类因不再受蓝藻抑制,数量呈上升趋势,特别是硅藻和绿藻代替蓝藻...

Relationship between phytoplankton and environmental factors in Dajinzhong reservoir of Guangzhou

Carrying out 5 sampling tests for Dajinzhong reservoir after one year operation and maintenance,the temporal and spatial variation of phytoplankton in the reservoir was studied after remediation,the relationship between the variations of phytoplankton and environment factors was also analyzed by using the correlation coefficient method.The results illustrated that when the water temperature fell the biomass of warm-preferred cyanophytes reduced drastically and showed significant positive correlation with temperature(r=0.986,p<0.05),while the other kinds of algae increased and were no longer restrained by cyanophytes,especially the diatom and chlorella,which took place of cyanophytes becoming the dominant species.The increase in concentration of organics promoted phytoplankton growth.The diatom and chlorella had significant positive correlation with COD and BOD5,and the correlation coefficient was between 0.6 and 0.9.The cyanophytes had negative correlation with COD and BOD5 because of the early blue-algal bloom.As the concentration of TN and TP were too high in the reservoir,which were no longer the limiting factors for phytoplankton growth,the phytoplankton biomass had insignificant negative correlation with TN and TP,and the correlation coefficient was-0.532 and-0.557 respectively.Along with the decrease of phytoplankton biomass,the oxygen consumption reduced and the concentration of DO increased.