摘要
2009年7月丰水期和2010年1月平水期对太湖武进港区域13个点的浮游植物进行调查,丰水期共鉴定出浮游植物6门24科46属,以绿藻和蓝藻居多,平均密度为14.8×106cell/L;平水期共鉴定出浮游植物5门18科29属,以硅藻为优势门类,平均密度为3 113 cell/L.浮游植物群落结构季节差异显著,丰水期密度明显大于平水期.通过主成分分析和典型对应分析,对调查区域内13个样点的浮游植物与8项水环境因子进行研究.结果表明,NH 4+-N和TN是影响浮游植物群落结构的主要污染因子,根据指示物种判断研究区域为中富型状态水体.
Field investigations on the phytoplankton community were carried out in July 2009 and January 2010 in Wujingang Region of Taihu Lake（WRTL）.Results show that there are 46 genus,24 families and 6 phylum phytoplankton were identified in wet season,which is mainly composed of the Chlorophyta and Cyanophyta,the average phytoplankton abundance of this season is 14.8×10^6 cell/L.There are 29 genus,18 families and 5 phylum phytoplankton were found in level season,and Diatoms were the dominant category,the average phytoplankton abundance of the season is 3 113 cell/L.It shows that a remarkable discrepancy in community and density between the two seasons.The principal component analysis（PCA） and canonical correspondence analysis（CCA） were used to assess the phytoplankton community structure with regard to 8 aquatic environmental factors and their spatial distribution,which result on the key aquatic environmental quality factors show that NH4^＋-N and TN were the most extraordinary pollution factors which affect the phytoplankton community and WRTL was in extrophication level.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2011年第7期1945-1951,共7页
Environmental Science
基金
国家水体污染控制与治理科技重大专项(2008ZX07526-001-04)
