The purpose of this study is to analyze seasonal variations of seaweed community structure according to ocean environment at three areas in the east coast of Korea. Mean water temperatures of Gosung, Samchuk, and Gyeongju were 8.3℃, 11.2℃, and 13.1℃, respectively, during the growing winter season of 2011. Subtidal benthic macroalgal flora and community structure were investigated at the sites between February to November 2011. The numbers of seaweed species at the areas were 38, 12, and 15, respectively. The amounts of biomass were 7.35 kg m-2, 1.80 kg m-2, and 0.84 kg m-2, respectively, during the period. The values of C/P, R/P, and (R+C)/P representing flora characteristics at Sokcho area were 0.1, 1.1, and 1.2, respectively. The values of flora characteristics at Samchuk were 0.3, 0.6, and 1.0, respectively. The values of flora characteristics at Gyeongju were 0.4, 4.0, and 1.2, respectively

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 조사지 개황
  2.2. 환경 특성
  2.3. 해조상 및 군집구조
 3. 결 과
  3.1. 수온 및 영양염 장기변동
  3.2. 종조성
  3.3. 생물량
  3.4. 수직분포
  3.5. 군집지수
 4. 고 찰
 참 고 문 헌

• 김영대(국립수산과학원 동해수산연구소) | Young-Dae Kim (East Sea Regional Fisheries Research Institute, NFRDI)
• 박미선(국립수산과학원 동해수산연구소) | Mi-Seon Park (East Sea Regional Fisheries Research Institute, NFRDI)
• 유현일(국립수산과학원 해조류 바이오연구센터) | Hyun-Il Yoo (Seaweed Research Center, NFRDI) Corresponding author
• 김상우(국립수산과학원 동해수산연구소) | Sang-Woo Kim (East Sea Regional Fisheries Research Institute, NFRDI)
• 정희동(국립수산과학원 동해수산연구소) | Hee-Dong Jeong (East Sea Regional Fisheries Research Institute, NFRDI)
• 민병화(국립수산과학원 동해수산연구소) | Min-Bong hwa (East Sea Regional Fisheries Research Institute, NFRDI)
• 진형주(강릉원주대학교 해양생명공학부) | Hyung-Joo Jin (Department of Marine Molecular Biotechnology, Gangneung-Wonju National University)