| 摘要: |
| 许多研究表明,河口海区具有其独特的生态特征。径流携带大量陆源物质入海,丰富了海域中的营养盐类资源,促进了海洋生物的生长繁殖。长江年径流量约为9.25×1011m3,其径流量随季节而变化,造成了长江口水环境的复杂性,从而对生物的组成、现存量和生产力等都产生明显影响。浮游植物是食物链中的初级生产者,其生产力直接或间接地影响水域中其他生物的生产力。关于长江口的初级生产力迄今尚未见报道。为此,于1985年8月至1986年10月对长江口海域进行了逐月调查,根据各月的叶绿素含量和在各特征海区中实测的光合作用碳同化数估算出初级生产力,并结合同时调查所取得的各项环境因子的动态,进行综合分析，旨在了解本海域的生物生产潜力,为合理利用长江口及其附近海域的海洋生物资源提供依据。 |
| 关键词: 长江口区、初级生产力 |
| DOI： |
| 分类号: |
| 基金项目:中国科学院海洋研究所调查研究报告第2064号 |
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| PRIMARY PRODUCTIVITY IN THE CHANGJIANG RIVER ESTUARY |
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Guo Yujie, Pan Youlian
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Institute of Oceanology, Academia Sinica
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| Abstract: |
| In the estuarine area of the Changjiang River, the primary productivity is rather high, being 1,062mg C/(㎡?d) in average, and has a very large seasonal fluctuation range. It reaches maximum, 3,670. 2 mgC/(㎡?d), from June to September and decreases to 150mgC/(㎡?d) from April to May and October to November, 24.7mgc/ C/(㎡?d)in January. The annual average of the primary production is about 359.34gC/㎡.It increases gradually eastwards from the Changjiang Estuary to 123°30′E(the middle part of the investigated area), then decreases to the east boundary of the investigated area (124°00'E). Obviously, the runoff of the Changjiang River is the main factor for the dynamics of the primary productivity, and the upwelling of the Zhejiang Coast and the runoff of the Qiantang River cannot be neglected. |
| Key words: PRIMARY PRODUCTIVITY,CHANGJIANG RIVER ESTUARY |
