We constructed marine forest to restore barren grounds which are expanding in the east coast of Korea using 2 methods of (1)seedlings transplantation method and (2)underwater floating ropes method. We transplanted 3 macroalgae species, Ecklonia cava, Undaria pinnatifida, and Saccharina. japonica to construct marine forest. Blade length of Undaria pinnatifida on underwater floating ropes was 56.70±8.69㎜ in April and grew 68.75±22.30㎜ in May and 70.75±14.36㎜ in July. Blade length of S. japonica was shown 97.95-143.00㎜ in April to June. Blade length of Ecklonia cava was 30.50±1.91㎜ in May, 41.55±1.84㎜ in August, 45.30±2.57㎜ in November, 2009 and 45.30±1.99㎜ in February, 2010. The survey on Dangsa area, Ulsan-city in January, 2009 found a total number of 15 algal species(1 brown algae, 14 red algae species) with the highest variety at 5m depth of A station and the lowest at 8m depth of A and B stations. The March survey showed a total of 24 species (1 green algae, 1 brown algae, 22 red algae species) with the highest variety of 11 at depths of 3m and 5m of B station and the lowest of 6 at 10m of B station. In May, total biomass was 3,755.4g (green algae 1.2g, brown algae 199.0g, red algae 3,555.2g). From January, 2009, we found that E. cava was dominant at the depths of 3m and 5m of A and B stations while Peyssonnelia capensis was dominant at the depth of 8m of A station. The 8m depth of B station was dominated by Acrosorium polyneurum. In May, Grateloupia lanceolata was dominant at 8m depth of A station while other depths were dominated by Phycodrys fimbriata. In June, the dominant species were G. lanceolata at the 3m depth, E. cava at the 5m and P. fimbriata at the depths of 8m and 10m of A station. Under B station, G. lanceolata was dominant at the depths of 3m and 5m while P. fimbriata was dominant at the depths of 8m and 10m.

Abstract
 1. Introduction
 2. Materials and Methods
  2.1. Overview of the study site
  2.2. Installation of artificial seaweed reefs
  2.3. Floating rope method for U. pinnatifida andS. japonica
  2.4. Transplantation method for E. cava seedlings
  2.5. Growth survey of transplanted E. cava
  2.6. Algal flora and community structure analysis
 3. Results and Discussions
  3.1. Overview of the study site
  3.2. Growth of U. pinnatifida
  3.3. Growth of S. japonica
  3.4. Growth of E. cava
  3.5 Marine Algal Flora in the Ambient Waters
  Dominant species by water depth
 4. Conclusion
 REFERENCE

• Young Dae Kim(Aquaculture Division, East Sea Regional Fisheries Research Institute, NFRDI)
• Hyun Gyum Kim(East Sea Office, Korea Fisheries Resources Agency)
• Chu Lee(Aquaculture Division, East Sea Regional Fisheries Research Institute, NFRDI)
• Hyun Il Yoo(Seaweed Research Institute, NFRDI)
• Mi Seon Park(Aquaculture Management Division, NFRDI)
• Soon Gyu Byun(Aquaculture Division, East Sea Regional Fisheries Research Institute, NFRDI)
• Jae-Suk Choi(Division of Bioindustry, Silla University)
• Myung Mo Nam(Aquaculture Division, East Sea Regional Fisheries Research Institute, NFRDI) Corresponding author