南海中部浮游有孔虫通量的季节变化

南海中部１９９３－１９９５年连续两年的浅层和深层时间系列沉积捕获器试验，揭示游游有孔虫总通量以及Ｇlobigerinoides saculifer,Globigerinoides ruber,Neogloboquadrina dutertrei,Globigerinita glutinata等种的通量和相对百分数在东北季风和西南季风盛行期出现高值，而Globigerina bulloides,Pulleniatina obiquiloculata和Globorotalia menardii等种则仅在冬东北季风盛行期出现高值。此外，还发现浮游有孔虫属种的通量呈现明显的年际变化，研究表明这种季节和和年际变化主要受与东亚季风相关的表层初级生产力和海洋水文条件变化的控制。

Seasonal Variations of the Planktonic Foraminiferal Flux in theCentral South China Sea

Planktonic foraminiferal fluxes have been analyzed based on the shallow and deep time-series sediment traps during 1993-1995 in the central South China Sea. In result, the total planktonic foraminiferal flux, the fluxes and relative abundances of Globigerinoides sacculifer, Globigerinoides ruber, Neogloboquadrina dutertrei, Globigerinita glutinata exhibit two prominent peaks which occur during the prevailing periods of the northeast and southwest monsoons, respectively, while those of Globigerina bulloides, Pulleniatina obliquiloculata and Globorotalia menardii have only one peak during the prevailing periods of the northeast monsoon. Besides, it was found that the fluxes of planktonic foraminiferal species exhibit obvious annual variations. Our observations indicate that these seasonal and annual variations are mainly controlled by the changes of surface primary productivity and hydrological conditions related to the East Asian monsoon.