| 淀山湖浮游藻类群落的早期增长 |
| 摘要点击 3707 全文点击 3361 投稿时间：2011-01-21 修订日期：2011-03-30 |
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| 中文关键词 浮游藻类群落 早期增长 Logistic增长模型 藻类水华 淀山湖 |
| 英文关键词 phytoplankton community early growth Logistic growth model algal bloom Dianshan Lake |
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| 中文摘要 |
| 对2004～2009年淀山湖浮游藻类群落生物量［以叶绿素a（Chla）表示］随时间的变化进行了数学模拟.模拟结果表明，Logistic增长模型能够很好地描述淀山湖浮游藻类群落春季和夏季的早期增长.一般说来，淀山湖春季以硅藻和绿藻为主的浮游藻类群落于2月下旬进入指数级增长，到3月上旬浮游藻类密度已经达到始盛点的2倍，浮游藻类密度的翻倍时间仅为18 d，到3月中旬浮游藻类群落的增长速度达到最大值29.4 μg·（L·月）-1； 6月可能形成浮游藻类水华.淀山湖夏季以蓝藻为主的浮游藻类群落于6月中下旬进入指数级增长，到7月中旬浮游藻类密度已经达到始盛点的2倍，浮游藻类密度的翻倍时间为26 d；到7月下旬浮游藻类群落的增长速度达到最大值22.8 μg·（L·月）-1， 8～9月可能形成蓝藻水华.淀山湖浮游藻类群落早期增长的一般规律，可以为浮游藻类水华的早期预警和预防提供科学依据. |
| 英文摘要 |
| Seasonal variation of phytoplankton community biomass (Chla) in Dianshan Lake was simulated based on data of 2004-2009.The result showed that early growths of the phytoplankton community in spring and summer seasons could be well described by the Logistic growth model. General speaking, phytoplankton community dominated by diatom and green algae may enter its exponential phase in the late February, doubling its density within 18 days, and reaching its maximum growth rate of 29.4 μg·（L·month）-1 in the middle of March, blooming in June. Phytoplankton community dominated by blue green algae may enter its exponential phase in the middle June, doubling its density within 26 days, and reaching its maximum growth rate of 22.8 μg·（L·month）-1 in the middle of July, blooming during August-September. The general pattern of early growth of phytoplankton community may offer sound information for early warning and prevention of algal bloom. |
