| 摘要: |
| 2004年4～5月初在东海赤潮高发区暴发的特大规模原甲藻赤潮前期和暴发初期对该海域进行的现场调查,并对该海域COD的分布特征进行了探讨。结果表明,赤潮暴发前COD为0.295～1.836 mg/L,主要受陆源输入影响。根据其在局部海区底层出现的异常升高结合其他参数分析可对特定海区潜在赤潮暴发的可能性进行评估。赤潮暴发时COD为0.36～3.14 mg/L,表层和中层与叶绿素存在显著正相关关系,表明其主要受生物影响。富营养化指数表明赤潮暴发前近一半海域已经处于富营养化状态,但COD对富营养化的贡献不如营养盐重要。 |
| 关键词: 赤潮 COD 赤潮高发区 东海 |
| DOI： |
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| 基金项目:国家重点基础研究发展规划项目(2001CB409703) |
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| Primary studies on the COD distribution and relationship with HAB for high frequency HAB occurrence areas of the East China Sea in spring 2004 |
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| Abstract: |
| Based on the data collected in spring 2004, COD distribution in high frequency Harmful Algae Bloom (HAB) occurrence areas of in the East China Sea was analyzed and the relationship between COD and HABs occurrence was discussed as well. The results showed that before HAB occurrence, COD ranged from 0.295～1.836 mg/L and influenced mainly by land runoffs. Combined with other parameters, the abnormal increase of COD in bottom layers in some parts of the region indicated a high risk of HAB occurrence. When HAB occurred, COD ranged from 0.36～3.14 mg/L and had a distinct correlation with chlorophyll a in surface and middle layer , indicating that COD was influenced mainly by phytoplankton. Meanwhile, the value of EI indicated that half of the survey area was in the state of eutrop hication, while COD was not a main factor of eutrophication. |
| Key words: harmful algae bloom COD high frequency HAB occurrence areas East China Sea |
