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引用本文:李培培,史文,刘其根,余元龙,何光喜,陈来生,任丽萍,洪荣华.千岛湖叶绿素a的时空分布及其与影响因子的相关分析.湖泊科学,2011,23(4):568-574. DOI:10.18307/2011.0412
LI Peipei,SHI Wen,LIU Qigen,YU Yuanlong,HE Guangxi,CHEN Laisheng,REN Liping,HONG Ronghua.Spatial and temporal distribution patterns of chlorophyll-a and the correlation analysis with environmental factors in Lake Qiandao. J. Lake Sci.2011,23(4):568-574. DOI:10.18307/2011.0412
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千岛湖叶绿素a的时空分布及其与影响因子的相关分析
李培培1, 史文1, 刘其根1, 余元龙1, 何光喜2, 陈来生2, 任丽萍2, 洪荣华2
1.上海海洋大学农业部水产种质资源与利用重点开放实验室, 上海 201306;2.浙江杭州千岛湖发展有限公司, 杭州 311700
摘要:
为了解千岛湖在大量放养鲢鳙鱼后叶绿素a的时空分布格局及其与主要环境因子的相关性, 本文于2007年1月至2009年12月对千岛湖叶绿素a及其他10个水质理化指标进行了每月定期采样及监测.结果表明:上游河流区和过渡区叶绿素a含量存在明显的季节变化, 其共同特点是每年会形成春季和夏末秋初的双高峰.叶绿素a含量在空间分布上具有一定的分异性, 河流区叶绿素a含量明显高于中下游区(过渡区和湖泊区).叶绿素a含量的最高峰通常出现在4-12m, 最深出现在20m, 春夏季出现明显分层.千岛湖叶绿素a与亚硝酸盐氮(NO2-N)、高锰酸盐指数(CODMn)、水温(WT)和硅酸盐(SiO32-)呈低度相关, 与其他环境因子无显著相关性或相关性很弱.多元逐步回归分析结果显示, 千岛湖叶绿素a与筛选出的几个关键环境因子之间的回归方程为:Chl.a=0.114WT+2.120CODMn+17.157SiO32--37.391NO2-N-1.946。
关键词:  千岛湖  叶绿素a  时空分布  相关分析
DOI:10.18307/2011.0412
分类号:
基金项目:国家自然科学基金项目(30670388,31072218);上海市重点学科项目(Y1101)联合资助
Spatial and temporal distribution patterns of chlorophyll-a and the correlation analysis with environmental factors in Lake Qiandao
LI Peipei1, SHI Wen1, LIU Qigen1, YU Yuanlong1, HE Guangxi2, CHEN Laisheng2, REN Liping2, HONG Ronghua2
1.Key Laboratory of Aquatic Genetic Resources and Utilization, Ministry of Agriculture, Shanghai Ocean University, Shanghai 201306, P.R.China;2.Hangzhou Qiandaohu Development Co., ltd., Hangzhou 311700, P.R.China
Abstract:
The temporal and spatial distribution patterns of chlorophyll-a and its correlation with the main environmental factors were analyzed according to the monthly investigation from January, 2007 to December, 2009 in Lake Qiandao where a large number of silver carp and bighead carp stocked.Results showed that the concentration of chlorophyll-a in sampling stations located in the upper reach riverine and transitional zones of the reservoir showed a significant seasonal variations with two concentration peaks oc-curred in spring and late summer or early fall,respectively.The concentrations of chlorophyll-a in upstream sites(in the riverine and transitional zones) were significantly higher than those of downstream sites.The chlorophyll-a during the warm season was usu-ally stratified with a concentration peak occurring at depths between 4m and 12m, occasionally at a depth of 20m.The result of cor-relation analysis showed a weak correlation between chlorophyll-a and NO2-N,CODMn ,water temperature( WT) and silicate (SiO32- ),while no significant correlations of the chlorophyll-a were found with other environmental factors,especially with the TP in the water.The regression equation between chlorophyll-a and the correlated environmental factors could be expressed through the multiple linear stepwise regressions as:Chl.a=0.114WT +2.120CODMn +17.157SiO32--37.391 NO2-N -1.946.
Key words:  Lake Qiandao  chlorophyll-a  spatial and temporal distribution  correlation analysis
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