摘要
为研究巢湖水环境因子与藻类生物量的相互作用,筛选出对藻类生物量相对重要的环境因子,以2008年巢湖水质监测数据为基础,采用多元统计方法对巢湖监测点数值数据进行了聚类分析、判别分析及污染特征识别,研究了水环境因子与藻类生物量的关系.结果表明:巢湖水环境自西向东分为重度污染区、中度污染区和轻度污染区,叶绿素、溶解性总氮可作为巢湖水环境空间显著性差异的指示因子.各监测点污染分级排序为:南淝河入湖区>十五里河入湖区>塘西河入湖区>西半湖湖心>派河入湖区>杭埠河入湖区>忠庙>兆河入湖区>坝口>东半湖湖心>造船厂>中垾乡.对藻类生物量影响较大的环境因子存在季节性变化,全年总磷、总氮、温度、硝氮、铵氮与藻类生物量的关系较为密切.
In order to understand the interactions between environmental factors and the algal biomass in Lake Chaohu,those relatively important environmental factors to alga biomass were extracted.Based on monitored water quality data of Lake Chaohu in 2008,cluster analysis,discriminate analysis and the recognition of pollution feature were carried out to reveal the relationships between water environment factors and algal biomass.Results suggest that the Lake Chaohu can be divided into severe polluted area,moderately polluted area,and mildly polluted area from west to east.The Chl.a and dissolved total nitrogen are the indicative factors describing the significantly spatial difference in water environment.The sequence of pollution classification for all the monitoring sites are as follows： Nanfei river inlake areaShiwuli river inlake areaTangxi river inlake areaWest lake center areaPaihe river inlake areaHangbu river inlake areaZhongmiao areaZhaohe river inlake areaBakou areaEast lake center areaShip factoryZhonghan town area.The screened important environmental factors to algal biomass vary with seasons.TP,TN,temperature,NO-3-N and NH＋4-N are closely related to algal biomass all the year round.
出处
《湖泊科学》
EI
CAS
CSCD
北大核心
2011年第6期873-880,共8页
Journal of Lake Sciences
基金
国家自然科学基金项目(21077097)
国家水体污染控制与治理科技重大专项项目(2008ZX0701-010)联合资助
关键词
时空变化
因子分析
聚类分析
多元回归
巢湖
水华
Spatial-temporal variations
factor analysis
cluster analysis
multiple regression
Lake Chaohu
algal bloom
