台湾海峡中、北部浮游有孔虫同海流和沉积环境的关系

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。

THE RELATION OF PLANKTONIC FORAMINIFERA TO CURRENTS AND ENVIRONMENT OF THE TAIWAN STRAIT'S THE CENTRAL AND NORTHERN PARTS

This paper presents results of analysis on the relation of planktonic foramini-fera to currents and sediment environment of the central and northern parts of theTaiwan Strait in July and August,1987 and in May and July,1988, using 43 bot-tom sediment samples and 118 vertical tow net samples as study material. The distributional trends of percentage species content (as in ferred from livingtests 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 investigatedarea is characterized by strong, warm northward flowing Taiwan Strait Currentwhich becomes gradually weaker in Haitan lsland's eastern vicinitu where it meetsthe southward flowing Fujian-Zhejiang coastal current.The abundance distributiontrend of empty and living tests were different.Empty tests were highly concentra-ted in the deep basin areas whereas living tests were more concentrated above theplatform. This trend is related to the depositional environment of the area and tothe complex current systems prevailing there. The scouring action of currents andlow sedimentation rate account for the great accumulation of dead tests in the basinareas.The lesser abundance of dead tests over the platform areas is due to the highsedimentation rate causing dilution of tests.