Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Seasonal Variation in Subtidal Seaweed Community Structure at Hajung, on the Southeast Coast of Korea

동해안 남부 하정 연안의 조하대 해조류 군집구조의 계절적 변화

  • Kim, Young-Dae (East Sea Fisheries Research Institute, NFRDI) ;
  • Park, Mi-Seon (East Sea Fisheries Research Institute, NFRDI) ;
  • Yoo, Hyun-Il (East Sea Fisheries Research Institute, NFRDI) ;
  • Min, Byung-Hwa (East Sea Fisheries Research Institute, NFRDI) ;
  • Moon, Tae-Seok (Faculty of Biological Science and Institute for Basic Science, Wonkwang University) ;
  • Choi, Han-Gil (Faculty of Biological Science and Institute for Basic Science, Wonkwang University)
  • 김영대 (국립수산과학원 동해수산연구소) ;
  • 박미선 (국립수산과학원 동해수산연구소) ;
  • 유현일 (국립수산과학원 동해수산연구소) ;
  • 민병화 (국립수산과학원 동해수산연구소) ;
  • 문태석 (국립수산과학원 동해수산연구소) ;
  • 최한길 (원광대학교 생명과학부/기초자연과학연구소)
  • Received : 2011.09.20
  • Accepted : 2011.11.14
  • Published : 2011.12.30
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Abstract

Subtidal benthic macroalgal flora and community structure on barren grounds were examined seasonally along vertical shore gradients on the rocky shore of Hajung, Pohang, on the southeast coast of Korea, from February 2005 to November 2006. Twenty-six seaweed species were identified, including 5 green, 7 brown, and 14 red algae. The number of seaweed species ranged between 7 and 17 among seasons and between 13 and 20 species were found in vertical gradients along the shore. Over the study period, average seaweed biomass (g wet wt/$m^2$) was 299.88 g and it ranged seasonally from 120.99 to 620.00 g. Seaweed biomass declined with increasing seawater depth and ranged between 323.06 and 593.68 g. The dominant seaweed species, in terms of biomass, were Desmarestia ligulata and Sargassum honeri, which grew at depths between 5 and 10 m. The red alga Delisea pulchra was also abundant at a depth of 15 m. No seasonal patterns were found in community indices. Along vertical shore gradients, community indices showed different patterns; the dominance index increased and the richness, evenness, and diversity indices decreased with seawater depth.

Keywords

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