We investigated short-term variations of phytoplankton community structure according to marine environmental condition with data set of phytoplankton composition, nutrients, physical parameters and precipitation. The 13 sampling stations were located in the southeast coastal waters of Korea, the survey monthly carried out from March to November. The study area can be divided into two zone according to the characteristics of marine environment. Zone I is the occupied with Thalassiosira decipiens, Skeletonema costatum, Eucampia zodiacus, Cheatoceros spp. and Asterionellopsis glacialis due to continuous freshwater input and high concentration of nutrients. Zone II was dominated by Pseudo-nitzschia spp. probably due to rainfall and self eutrophication of aquaculture farm.

• 임월애(국립수산과학원 수산해양종합정보과) | Weol Ae Lim Corresponding Author
• 이영식(국립수산과학원 수산해양종합정보과) | Young Sik Lee
• 윤석현(국립수산과학원 수산해양종합정보과) | Suk Hyun Youn
• 조은섭(국립수산과학원 수산해양종합정보과)
• 황재동(국립수산과학원 수산해양종합정보과) | Jae Dong Hwang
• 한인성(국립수산과학원 수산해양종합정보과) | In Seong Han
• 서영상(국립수산과학원 수산해양종합정보과) | Young Sang Suh