摘要
于2005年6月至2006年5月对淀山湖小型(20～200μm)、微型(2～20μm)和微微型(<2μm)浮游植物叶绿素a和水质因子进行逐月调查研究。结果表明:小型和微型浮游植物是淀山湖水体年均叶绿素a的主要贡献者,二者贡献率之和为74.79%。淀山湖叶绿素a粒径组成百分比的季节变动与水体浮游植物群落结构季节演替密切相关:小型浮游植物叶绿素a浓度所占百分比春季最高,而微型、微微型的则分别在秋、冬季最高。相关性分析显示,小型、微型浮游植物叶绿素a浓度百分比与NH3-N含量分别呈显著正、负相关,微微型浮游植物叶绿素a百分比与BOD5呈极显著负相关。对应滤食性鱼类等水生动物的食性粒级,探讨了运用非经典生物操纵技术防治淀山湖富营养化的可行性。
Size-fraetionated chlorophyll-a of phytoplankton and water quality variables were investigated monthly from June 2005 to May 2006 in Dianshan Lake. Results showed that the chlorophyll-a concentration of micro-phytoplankton （20-200 μm） and nano-phytoplankton （2-20 μm） were main contributors to the annual mean of chlorophyll a in Dianshan Lake, both accounting for 74.79%. Seasonal variations of percentages of all size-fractionated chlorophyll-a were closely related with seasonal succession of phytoplankton community structure. Percentage of micro phytoplankton chlorophyll-a peaked in spring, while that of nano-, pico phytoplankton peaked in autumn and winter, respectively. Bivariate correlation analysis showed that percentage of micro-phytoplankton chlorophyll-a was correlated positively with NHa- N, while that of nano-phytoplankton was correlated negatively with NH3 N. Percentage of pico-phytoplankton chlorophyll-a was correlated negatively with BOD5, significantly. Correspondingly, the feasibility of non-classic biomanipulation in controlling algal bloom in Dianshan Lake on the basis of feeding habits of aquatic animals such as filtering fish was also discussed.
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2010年第9期997-1002,共6页
Resources and Environment in the Yangtze Basin
基金
上海市科学技术委员会重大项目(08DZ1203103)
上海市重点学科建设项目(S30701)
关键词
浮游植物
叶绿素a粒径组成
水质因子
淀山湖
phytoplankton
size
fractionated chlorophyll-a
water quality variables
Dianshan Lake
