| 摘要: |
| 根据1990－1991年大鹏湾盐田海域4个测站的观测资料分析结果表明，大鹏湾赤潮多发区海水中叶绿素a含量的测值范围为0.06－8.28 mg/m3，平均为1.33 mg/m3。季节平均值以春、秋季较高，夏、冬季较低；表层的叶绿素a含量稍高于底层。采用多元逐步回归分析得知，影响叶绿素a含量变化的主要因子是Fe，COD，S，其次是DO，t，Tb；此外，Mn，Si(OH) 4，PO4，NO2与叶绿素a含量变化也有较好的相关性。对叶绿素a的分布变化与各种无机要素和赤潮之间的关系提出综合的相关模式，可为进一步研究海湾生态和探索赤潮预测预报途径提供参考。 |
| 关键词: 叶绿素a 周年变化 环境因子 大鹏湾 |
| DOI： |
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| 基金项目:国家自然科学基金资助，9389008号 |
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| PRELIMINARY STUDIES ON THE RELATIONSHIPS BETWEEN CHLQROPHYLL a AND ENVIRONMENTAL FACTORS IN DAPENG BAY |
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Huang Liangmin1, Qian Honglin2, Li Jinrong2
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1.South China Sea Institute of Oceanology, Academta Sinica, Cuangzhou 510301;2.South China Sea Branch, SOA, Guangzhou 510301
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| Abstract: |
| Based on data collected from 1990 to 1991, this paper deals with variations of chlorophyll-a values in the waters of often occurrence of red tide in Dapeng Bay, and on the relationships between chlorophyll-a and some environmental factors.
Preliminary results indicated that chlorophyll-a values were 0.06 - 8.28 mg/m3 (average of 1.33 mg/m3), higher in spring and autumn, lower in summer and winter. Chlorophyll-a contents at the surface are higher than those at bottom. Multiple regression shows that soluble Fe, COD and salinity are the most important factors influencing the variations of chlorophyll-a (followed by DO, t, turbidity) and that Mn, Si(OH)3-Si,PO4-P,NO2-N have significant correlation with chlorophyll-a. In Dapeng Bay, Noctiluca scientillans red tide always occurs in spring. Red tide caused by other organisms, such as Skeletonema costatum, Chattonella marina and Conyaulax polygramma, etc., were sometimes also observed there at that time. The relationships between chlorophyll-a and inorganic andorganic factors and occurrence of red tide are analysed and discussed. The results can be helpful for further ecological research in the bay and for red tide forecasting. |
| Key words: Chlorophyll-a, Annual variations, Environmental factors, Dapeng Bay |
