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我们对位于西北太平洋黑潮主轴区ＭＴＤ－０２站的１１个不同深度进行水平浮游拖网，并将采集到的活体浮游有孔虫（＞１２５μｍ）进行定量分析。结果表明，绝大多数活体浮游有孔虫生存于１００～２００ｍ以上的水体中，并集中分布于７５ｍ以上的水体。本站位８月份的最主要属种为：Ｇｌｏｂｉｇｅｒｉｎｏｉｄｅｓｒｕｂｅｒ，Ｇ．ｓａｃｃｕｌｉｆｅｒ，Ｎｅｏｇｌｏｂｏｑｕａｄｒｔｎａｄｕｔｅｒｔｒｅｉ和Ｇｌｏｂｉｇｅｒｉｎｉｔａｇｌｕｔｉｎａｔａ。次主要属种为Ｇｌｏｂｉｇｅｒｉｎｅｌｌａ ａｅｑｕｉｌａｔｅｒａｌｉｓ， ｇｌｏｂｉｇｅｒｉｎａｂｕｌｌｏｉｄｅｓ，Ｐｕｌｌｅｎｉａｔｉｎａｏｂｌｉｑｕｉｌｏｃｕｌａｔａ，Ｇｌｏｂｏｒｏｔａｌｉａｔｒｕｎｃａｔｕｌｉｎｏｉｄｅｓ，Ｏｒｂｕｌｉｎａｕｎｉｖｅｒｓａ和Ｇ．ｃｏｎｇｌｏｂａｔｕａ。这些种在不同的深度其产出量大不相同，但绝大多数均在叶绿素最为丰富的２５ｍ处显示出最大值。这表明食物来源是控制浮游有孔虫在ＭＴＤ－０２站垂直分布的最主要因素。另外，Ｇｌｏｂｉｇｅｒｉｎｅｌｌａａｅｑｕｉｌａｔｅｒａｌｉｓ和Ｐｕｌｌｅｎｉａｔｉｎａｏｂｌｉｑｕｉｌｏｃｕｌａｔａ两个种在温跃层的底部５０ｍ处显
We conducted a horizontal planktoning trawl at 11 different depths located at the MTD-02 station in the main Kuroshio region of the Northwest Pacific Ocean and quantified the collected planktonic foraminifera (> 125 μm). The results show that the majority of living planktonic foraminifera live in water body above 100 ~ 200m, and are concentrated in water bodies above 75m. The most important genera for August are Globigerinoidesruber, G. sacculifer, Neogloboquadrtnadutertrei and Globigerinitaglutinata. The minor major species are Globigerinella aequilateralis, globigerinabulloides, Pulleniatina obliquiloculata, Globorotaliatruncatulinoides, Orbulinauniversa and G. conglobatua. The yields of these species vary greatly at different depths, but the vast majority show their maximum at 25 m where chlorophyll is most abundant. This indicates that the source of food is the most important factor controlling the vertical distribution of planktonic foraminifera at MTD-02 station. In addition, two species of Globigerinellaaequilateralis and Pulleniatinaobliquiloculata were found at the bottom of the thermocline at 50m