中文摘要：

2006年10月～2007年9月,对西湖5个主要湖区的8个样点水体的温度、溶解氧、pH、透明度、悬浮物、总氮、总磷、叶绿素a浓度等理化因子和藻类生物量进行测定和分析,讨论总氮、总磷与优势种藻类、藻类总量的平均浓度的关系。结果表明,总氮年平均值2.63mg/L,变化范围0.17～7.88mg/L;总磷年平均值为0.087mg/L,10月最高,为0.187mg/L;叶绿素年平均值为24.49μg/L,最大值和最小值分别出现在2007年7月(50.59μg/L)与2月(1.09μg/L)。优势种藻类及藻类总量的平均浓度与总氮呈极显著负相关(P<0.01),与总磷呈显著正相关(P<0.05),总磷为西湖藻类增殖的主要限制因子。作为一个内源性污染的浅水富营养化湖泊,西湖的治理需要控制人为因素对水体的影响,减少底泥营养盐的再释放,尤其是降低可溶性磷酸盐的释放,从而抑制藻类的过量繁殖。

英文摘要：

From Oct.2006 to Sep.2007,the physical and chemical factors of eight water sampling points from the five main parts of West Lake,including temperature,DO,pH,transparence,TSS(OSS and ISS),TN,TP,concentration of Chla and the biomass of algae were measured and analyzed monthly.The relationships between average density of three dominant phytoplankton species and gross algae and TN,TP were discussed.The results showed that the concentrations of TN and TP were still rather high.The average TN was 2.63mg/L,and the...