| 摘要: |
| 于1987年7月和8月及1988年5月和7月，在台湾海峡中、北部海域，利用浮游生物网和蚌式采泥器分别采集了水层中的浮游有孔虫标本和表层沉积里的浮游有孔虫遗壳样品。对活体和遗壳在数量和组成方面对比分析研究表明，调查海区暖水性最强的水域位于东南角的A5站一带，海峡暖流水由此向北延伸，在海坛岛以东D1站附近，因与闽浙沿岸水交汇而减弱。遗壳高值区位于深水的盆地，活体则出现在台地上，两者分布不一致。其原因在于盆地受冲刷，沉积作用缓慢，遗壳被浓缩；台地沉积速率高，遗壳数量被稀释。 |
| 关键词: 浮游有孔虫 活体 遗壳 海流 沉积速率 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目，4860241号 |
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| THE RELATION OF PLANKTONIC FORAMINIFERA TO CURRENTS AND ENVIRONMENT OF THE TAIWAN STRAIT’S THE CENTRAL AND NORTHERN PARTS |
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Fang Huiying
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Fujian Institute of Oceanology, Xiamen 361012
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| Abstract: |
| This paper presents results of analysis on the relation of planktonic foraminifera to currents and sediment environment of the central and northern parts of the Taiwan Strait in July and August, 1987 and in May and July, 1988, using 43 bottom sediment samples and 118 vertical tow net samples as study material.
The distributional trends of percentage species content (as in ferred from living tests in the water column and of dead tests on the surface of Dottom sediment) were basically similar and suggesting that the southeastern part of the investigated area is characterized by strong, warm northward flowing Taiwan Strait Current which becomes gradually weaker in Haitan lsland’s eastern vicinitu where it meets the southward flowing Fujian-Zhejiang coastal current. The abundance distribution trend of empty and living tests were different. Empty tests were highly concentrated in the deep basin areas whereas living tests were more concentrated above the platform. This trend is related to the depositional environment of the area and to the complex current systems prevailing there. The scouring action of currents and low sedimentation rate account for the great accumulation of dead tests in the basin areas. The lesser abundance of dead tests over the platform areas is due to the high sedimentation rate causing dilution of tests. |
| Key words: Planktonic foraminifera, Living tests, Dead test, Currents, Sedimentation rate |
