| 渤海湾浮游植物与环境因子关系的多元分析 |
| 摘要点击 2761 全文点击 1893 投稿时间：2012-06-13 修订日期：2012-09-11 |
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| 中文关键词 浮游植物 环境因子 多元分析技术 春夏季 渤海湾 |
| 英文关键词 phytoplankton environmental factors multivariate analysis techniques spring and summer Bohai Bay |
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| 中文摘要 |
| 2007年春季和夏季对渤海湾的浮游植物和环境因子进行调查,运用多元分析技术分析浮游植物在渤海湾的分布特征及其与环境因子之间的关系. 调查期间共发现浮游植物26种,其中春季17种,夏季23种. 春季浮游植物平均数量为115×104 cells·m-3,显著高于夏季(3.1×104 cells·m-3). 应用主成分分析(PCA)浮游植物分布特征,结果表明,春季浮游植物主要分布于渤海的中北部,是硝酸盐含量较高的水域; 夏季浮游植物分布于各个水域,但优势种主要分布于河口附近. 运用冗余分析(RDA)探讨浮游植物分布与环境因子之间的关系,结果表明,影响渤海湾浮游植物分布的关键环境因子,春季是硝酸盐、亚硝酸盐和溶解性活性磷酸盐,夏季是氨氮和水温. |
| 英文摘要 |
| A detailed field survey of hydrological, chemical and biological resources was conducted in the Bohai Bay in spring and summer 2007.The distributions of phytoplankton and their relations to environmental factors were investigated with multivariate analysis techniques. Totally 17 and 23 taxa were identified in spring and summer, respectively. The abundance of phytoplankton in spring was 115×104 cells·m-3, which was significantly higher than that in summer (3.1×104 cells·m-3). Characteristics of phytoplankton assemblages in the two seasons were identified using principal component analysis (PCA), while redundancy analysis (RDA) was used to examine the environmental variables that may explain the patterns of variation of the phytoplankton community. Based on PCA results, in the spring, the phytoplankton was mainly distributed in the center and northern water zone, where the nitrate nitrogen concentration was higher. However, in summer, phytoplankton was found distributed in all zones of Bohai Bay, while the dominant species was mainly distributed in the estuary. RDA indicated that the key environmental factors that influenced phytoplankton assemblages in the spring were nitrate nitrogen (NO3--N), nitrite nitrogen (NO2--N) and soluble reactive phosphorus (SRP), while ammonium nitrogen (NH4+-N) and water temperature (WT) played key roles in summer. |
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