We investigated the spatial and temporal variations of phytoplankton in Youngil Bay as well as the effect of water physico-chemical parameters. Water samples at three stations were collected and measured monthly from May to November in 2010. The taxa of phytoplankton observed in this study were classified as 33 Bacillariophyceae, 23 Dinophyceae, 1 Euglenophyceae, 2 Crysophyceae and 1 Cryptophyceae. The highest biomass of phytoplankton was observed at inner station in September, which was characterized high concentration of dissolved inorganic phosphate(DIP) in surface water after rainfall. Nutrient concentrations, chlorophyll-a and phytoplankton biomass values showed the marked trend to decrease from the inner bay to the outer bay. Pearson's correlation co-efficient between salinity and other water parameters including chlorophyll-a, pH and DIP showed the strong negative relationship r=-0.82, r=-0.78 and r=-0.75 (p＜0.01), respectively. These results indicate that the water quality of Youngil Bay could be stimulated by nutrient enriched input from Hyeogsan River discharge, and the spatial and temporal distribution of phytoplankton biomass principally limited to DIP concentration from Hyeogsan river.

Abstract
 1. 서 론
 2. 재료 및 방법
 3. 결과 및 토의
  3.1. 수질환경 특성
  3.2. 식물플랑크톤의 분포 특성
  3.3. 식물플랑크톤과 수질환경과의 상관관계
 4. 결 론
 참 고 문 헌

• 심정민(국립수산과학원 동해수산연구소) | Jeong-Min Shim (East Sea Fisheries Research and Development Institute, NFRDI) Corresponding author
• 권기영(국립수산과학원 동해수산연구소) | Ki-Young Kwon (East Sea Fisheries Research and Development Institute, NFRDI)
• 정희동(국립수산과학원 동해수산연구소) | Hee-Dong Jeong (East Sea Fisheries Research and Development Institute, NFRDI)
• 최용규(국립수산과학원 동해수산연구소) | Yong-Kyu Choi (East Sea Fisheries Research and Development Institute, NFRDI)
• 김상우(국립수산과학원 동해수산연구소) | Sang-Woo Kim (East Sea Fisheries Research and Development Institute, NFRDI)