동해 전선역 동물플랑크톤 군집 : 2 . 수온과 분포의 관계 = Zooplankton Community in the Front Zone of the East Sea ( the Sea of Japan ) , Korea 2 . Relationship between Abundance Distribution and Seawater Temperature

다국어 초록 (Multilingual Abstract)

Distribution of zooplankton abundance was studied in the front zone in the East Sea in November, 1996. Averaged total abundance in the front zone was less than that in the nearby cold surface water areas but more than that in the nearby warm surface water areas. The number of taxa was the greatest in the upper layer of mixing. Abundance and the number of taxa in the front zone were contributed by the cold water and the warm wster, respectively. Inspite of the differences in sampling time (day vs night), the species composition and abundance distribution were similar at two sites within cold or warm water area. However, they were quite different at two sites in the front zone altnough the sampling time of the day was the same. From this, the history of mixing was believed to be the most important factor for the species composition and abundance distribution in the front zone. Zooplankton distribution in the study area was mainly controlled by the dominant cold water Copepod species Metridia pacifica, the only taxon that showed significant diel vertical migration. Most other taxa showed no significant diel vertical migration. Seawater temperature also affected zooplankton distribution. Positive correlations in the warm area, weak negative correlations in the cold water area, and no significant correlation in the front zone were obtained in general between the seawater temperature and the abundances of the major taxa.