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滴水湖叶绿素a时空分布及其与水质因子的关系

梅卫平1,江敏1,2**,阮慧慧1,刘金金1   

  1. (1上海海洋大学水产与生命学院, 上海 201306; 2水域环境生态上海高校工程研究中心, 上海 201306)
  • 出版日期:2013-05-10 发布日期:2013-05-10

Spatiotemporal distribution of chlorophyll-a  and the  relation to water quality variables in Dishui Lake of Shanghai, East China.

MEI Wei-ping1, JIANG Min1,2**, RUAN Hui-hui1, LIU Jin-jin1   

  1. (1College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China; 2Research and Engineering Center on Aquatic Environment Ecosystem, Shanghai 201306, China)
  • Online:2013-05-10 Published:2013-05-10

摘要: 根据2011年9月—2012年8月监测数据,分析上海市人工湖泊——滴水湖叶绿素a的时空分布及其与主要环境因子的相互关系。结果表明:滴水湖叶绿素a含量随时间的变化幅度较大,表现为3、7月出现高峰而其他月份较低;叶绿素a含量在空间分布上具有一定的分异性,湖心普遍偏高,其他各点相对较低;对滴水湖叶绿素a采用主成分多元线性回归分析(APCS-MLR),得到描述水质因子的潜变量F1F2与其相关性较大,建立了潜变量与叶绿素a含量的相关性模型;滴水湖叶绿素a含量与溶解氧(DO)、水温、总溶解磷(TDP)、活性磷(AP)有着密切的相关性;磷为滴水湖水体初级生产力的限制因子;因此,磷是有效控制滴水湖水体富营养化的关键因子。

关键词: 木霉菌, 南方根结线虫, 防治效果, 定殖作用

Abstract: Based on the monitoring data of Dishui Lake from September 2011 to August 2012, this paper analyzed the spatiotemporal distribution of chlorophyll-a (Chl-a) and its correlations with the main aquatic ecological factors in the Lake. There was an obvious temporal variation of the Chl-a concentration, with two peaks in March and July, respectively. Spatially, the Chl-a concentration also had definite differentiation, being generally higher in the lake center than at the other points. Absolute principal component score analysis and multivariate liner regression (APCSMLR) were adopted to approach the relationships between the Chl-a concentration and the water quality variables, which showed that the latent water quality variables F1 and F2 had greater correlations with the Chl-a concentration, and a correlation model of the latent variables and Chl-a concentration was established. The Chl-a concentration had close relationships with the water temperature, dissolved oxygen, total dissolved phosphorus, and available phosphorus, and phosphorus was the limiting factor of the primary productivity of Dishui Lake. It was suggested that the phosphorus concentration in the water could be the main factor controlling the eutrophication of Dishui Lake.

Key words: Trichoderma spp., root-knot nematode, control effect, rhizosphere colonization.