| 南太湖入湖口叶绿素ａ时空变化及其与环境因子的关系 |
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| 投稿时间：2012-10-15 修订日期：2012-11-09 |
| DOI： |
| 中文关键词:南太湖入湖口 叶绿素a 环境因子 相关分析 |
| 英文关键词:inlets of South Taihu Lake chlorophyll-a environmental factors correlation analysis |
| 基金项目:湖州市科技重点攻关项目(2000GS04) |
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| 中文摘要: |
| 根据2010年1-12月专项监测数据,分析南太湖入湖口水域叶绿素a含量的时空变化特征以及与水温和营养盐等主要环境因子的相关性。研究表明,叶绿素a含量随时间变化明显,夏季最高,秋冬季次之,春季最低;在空间分布上,太湖西南入湖口水域的叶绿素a含量明显高于太湖南部入湖口水域。叶绿素a含量全年平均值为(15.71±11.24)μg/L,变化范围在1.50～74.3μg/L。叶绿素a含量与水温、pH、高锰酸盐指数(CODMn)、总磷(TP)、氨氮(NH4+-N)呈极显著正相关,与溶解氧(DO)、总氮(TN)、TN/TP呈极显著负相关。叶绿素a含量变化受多个因子共同影响,水温是叶绿素a含量变化的关键因子。氮磷比平均值为17.8,在藻类生长氮磷比的最佳范围内,易发生蓝藻水华。叶绿素a含量的对数与TP的对数呈极显著正相关,与TN和TN/TP的对数呈极显著负相关。磷是南太湖入湖口水域浮游植物生长的限制因子。 |
| 英文摘要: |
| According to the monitoring data in the inlets of South Taihu Lake from January to December 2010，the spatial-temporal characteristics of chlorophyll-a concentration and the correlation analysis between the chlorophyll-a concentration and main environmental factors including water temperature and nutrients were investigated. The results indicated that there was an obvious temporal and spatial variation of chlorophyll-a concentration. The highest average concentration of chlorophyll-a was monitored at summer, the lowest was monitored at spring ; the average chlorophyll-a concentration at southwest of Taihu Lake was higher than that at south of Taihu Lake. The annual average of chlorophyll-a concentration was(15.71 ± 11.24)ug/ L，ranged from 1.50ug/L to 74. 3 ug/L. Significantly positive correlations were found between chlorophyll-a concentration and water temperature，pH，permanganate index (CODmn)，total phosphorus(TP)，and ammonia-nitrogen(NH+4-N). Significantly negative correlations were found between chlorophyll-a concentration and dissolved oxygen(DO)，total nitrogen(TN)，and TN/TP. The chlorophyll-a concentration was influenced by multi environmental factors，and the water temperature was the key factor. The average value of TN/TP was 17. 8，which was in the best range for the growth of algae and made the cyanobacterial bloom happen easily. Significantly positive logarithmic correlation was found between chlorophyll-a concentration and TP. Significantly negative logarithmic correlations were found between chlorophyll-a concentration and TN，TN/TP. Phosphorus was the main limited factor for the growth of phytoplankton in inlets of South Taihu Lake. |
| 毕京博,郑 俊,沈玉凤,周 顺.2012.南太湖入湖口叶绿素ａ时空变化及其与环境因子的关系[J].水生态学杂志,33(6):7-13. |
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