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新开挖景观河道浮游植物群落结构特征及与环境因子的关系

徐玉萍1,刘彩虹1,张垚垚2,张玮1,3,刘歆璞1,王丽卿1**   

  1. 1 上海海洋大学水产与生命学院, 上海 201306; 2上海临港海洋高新技术产业发展有限公司, 上海 201306; 3上海水生环境工程有限公司, 上海 201306)
  • 出版日期:2014-03-10 发布日期:2014-03-10

Phytoplankton community structure and its relation to environmental factors in a newly excavated landscape river.

XU Yu-ping1, LIU Cai-hong1, ZHANG Yao-yao2, ZHANG Wei1,3, LIU Xin-pu1, WANG Li-qing1,3**   

  1. (1College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China; 2Shanghai Lingang Marine HighTech Industry Development Co., Ltd, Shanghai 201306, China; 3Shanghai Aquatic Environmental Engineering Co., Ltd, Shanghai 201306, China)
  • Online:2014-03-10 Published:2014-03-10

摘要: 于2011年12月—2012年11月,每月一次测定新开挖景观河道——上海临港B港河道的浮游植物和水质指标,对该河道浮游植物群落结构及其与环境因子之间的关系进行了研究。结果表明:鉴定出浮游植物7门223种,绿藻门种类最多,其次为蓝藻门和硅藻门,浮游植物群落数量变幅为7.52×106~212×106 cells·L-1,平均数量为66.27×106 cells·L-1,丰水期的种类数高于枯水期,浮游植物数量则相反,各季度优势种变化不大,主要以蓝藻门的平裂藻属(Merismopedia spp.)为主;典范对应分析排序表明,浮游植物在4个象限中分布均匀,反映河道水系处于四季分明的亚热带气候特点;主成分分析和典范对应分析排序表明,对河道浮游植物群落动态变化影响较大的环境因子是盐度、营养盐(TN和TP);小形色球藻(Chroococcus minor)、银灰平裂藻(Merismopedia glauca)、膨胀四角藻(Tetraedron tumidulum)和针杆藻(Synedra sp.)可作为盐度的指示种;短线脆杆藻(Fragilaria brevistriata)、尖针杆藻(Synedra acus)、新月菱形藻(Ntizschia closterium)和束缚色球藻(Chroococcus tenax)对指示有机污染有潜在价值。

关键词: 优势种, 生态位重叠, 森林群落, 生态位宽度, 广义可加模型

Abstract: To explore the phytoplankton community structure and its relationship with environmental factors, a survey was conducted in the newly excavated landscape river (Port B, Lingang, Shanghai) from December 2011 to November 2012. The results showed that there were 223 phytoplankton species, which belong to seven Phyla. Phyla Chlorophyta had the most species, followed by Cyanophyta and Bacillariophyta. The phytoplankton abundance ranged from 7.52×106 to 212×106 cells·L-1, with an average of 66.27×106 cells·L-1. The species abundance in the rainy period was significantly higher than in the drought period, while cell density was vice versa. The dominant species was simplex for each season, which mainly consisted of the Merismopedia spp. Canonical correspondence analysis (CCA) showed that the distribution of phytoplankton in the four quadrants was homogeneous, which reflected the typical characters of subtropical climate. PCA and CCA indicated that salinity and nutrients (TN and TP) were the main driving factors for the dynamic change of phytoplankton community. Chroococcus minor, Merismopedia glauca, Tetraedron tumidulum and Synedra sp. could be used as efficient indicators for salinity, while Fragilaria brevistriata, Synedra acus, Ntizschia closterium and Chroococcus tenax showed a potential value for indicating the organic pollution.

Key words: dominant species, generalized additive model., forest community, niche breadth, niche overlap