1997年 8月对台湾海峡南部 4个取样站进行了海洋线虫调查 ,获得了海洋线虫 85种 ,隶属于 3目 2 5科 75属。密度较高的种有变异矛咽线虫 (Dory laimopsisvariabilis)、萨巴线虫 (Sabtieriasp .)、(Vasostomasp .1 )、(Vasostomasp .2 )和 (Xyalasp .)等 ,其平均密度分别为 1 .1 4、1 .1 2、0 .6 1、0 .87和 0 .34× 1 0 4个 /m2 ,分别占海洋线虫总平均密度的 1 1 .7%、1 1 .5 %、6 .2 %、9.2 %和 3.5 %。与其他海域相比 ,台湾海峡南部海洋线虫优势种的密度低 ,但与大型底栖动物或多毛类相比 ,海洋线虫种类多样性指数较高 ,均在 4.0以上。台湾海峡南部海洋线虫的取食类型以选择性和非选择性食沉积物者类型占多数 ,但刮食性种类也不少 ,这与台湾海峡南部沉积物类型密切相关。台湾海峡南部既有细的陆源沉积物流入 ,又有上升流、黑潮暖流等的作用而形成的较粗沉积物 ,因而构成台湾海峡南部沉积物的复杂性。Four stations were designed for investigation of marine nematodes in south Taiwan Strait in August 1997 and eighty five species were got during investigation, which belong to 3 orders, 25 families and 75 genera. The dominant species were, Dorylaimopsis variabilis, Sabatieria sp., Vasostoma sp.1, Vasostoma sp.2 and Xyala sp.. Their average densities were 1.14,1.12, 0.61 ,0.87 and 0.34 ×10 4ind./m 2 respectively, which occupied 11.7%,11.5%,6.2%,9.2% and 3.5% of total nematode density respectively. Compared with other sea waters, the densities of dominant species for marine nematode in south Taiwan Strait were low. But the species diversity index of nematode was higher than that of macrobenthos or that of polychaete in same waters. The food types of marine nematode in south Taiwan Strait mainly consist of selective deposit feeder and epistrate feeder, which closely related to the sediment. The sediment in south Taiwan Strait is coarser and more complex than that in the subaqueous delta of the Huanghe River because there are not only coastal current but also upwelling in south Taiwan Strait.国家自然科学基金重点项目资助!(496 36 2 2 0号
