The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY (한국해양학회지:바다)

The Korean Society of Oceanography (한국해양학회)
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Marine Algal Flora and Community Structure in Subtidal Zone of Wangdol-Cho on the East Coast of Korea

동해 왕돌초 조하대의 해조상과 군집구조

  • Kwon, Chun Jung (Korea Inter-University Institute of Ocean Science, Pukyong National University) ;
  • Choi, Chang Geun (Department of Ecological Engineering, Pukyong National University)
  • 권천중 (부경대학교 해양과학공동연구소) ;
  • 최창근 (부경대학교 생태공학과)
  • Received : 2014.07.15
  • Accepted : 2014.08.20
  • Published : 2014.08.28
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Abstract

Marine algal flora and community structure were investigated seasonally at three sites in subtidal zone of Wangdol-cho on the east coast of Korea from May 2012 to August 2013. A total of 122 species were collected and identified, including 12 green algae, 29 brown algae, and 81 red algae. Of these, 38 species were found throughout the survey period. Average seaweed biomass was 472.19-1,198.77 g wet wt. $m^{-2}$ in spring, 68.99-631.14 g wet wt. $m^{-2}$ in summer, 200.91-401.20 g wet wt. $m^{-2}$ in autumn, and 53.61-922.32 g wet wt. $m^{-2}$ in winter. The vertical distribution based on biomass were Grateloupia lanceolata, Acrosorium venulosum, Lomentaria catenata - Undaria pinnatifida, Dictyopteris pacifica, Sargassum horneri, Ecklonia cava - Desmarestia viridis, E. cava, S. horneri from upper to lower subtidal zone. The flora was classified into six functional groups: filamentous form (34.43%), coarsely branched form (25.41%), sheet form (24.59%), thick leather form (9.71%), crustose form (5.74%) and jointed calcareous form (0.82%). The C/P, R/P and (R+C)/P values reflecting the flora characteristics were 0.41, 2.79 and 3.21, respectively. Also, diversity index (H') and dominance index (DI) indicate that the algal community and environmental condition of Wangdol-cho is stable. We recommend that Wangdol-cho subtidal zone should be more protected from human activities such as turbulence and eutrophication in order to maintain species diversity and abundance of algae.

한국 동해안 울진군에 위치한 왕돌초 조하대에서 2012년 5월부터 2013년 8월까지 계절별로 해조상 및 군집구조에 관한 연구를 수행하였다. 연구기간 동안 녹조류 12종, 갈조류 29종, 홍조류 81종을 포함한 122종이 채집 및 동정되었으며, 38종의 해조류는 조사지역에서 연중 출현하였다. 정점별 평균 생물량은 봄 472.19-1,198.77 g wet wt. $m^{-2}$, 여름 68.99-631.14 g wet wt. $m^{-2}$, 가을 200.91-401.20 g wet wt. $m^{-2}$, 겨울 53.61-922.32 g wet wt. $m^{-2}$로 나타났다. 생물량에 근거한 왕돌초 해조류의 수직분포는 상부 개도박(Grateloupia lanceolata), 넓은분홍잎(Acrosorium venulosum), 마디잘록이(Lomentaria catenata), 중부 미역(Undaria pinnatifida), 참가시그물바탕말(Dictyopteris pacifica), 괭생이모자반(Sargassum horneri), 감태(Ecklonia cava), 하부 쇠꼬리산말(Desmaeistia viridis), 감태(E. cava), 괭생이모자반(S. horneri) 순으로 확인되었다. 왕돌초에서 출현한 해조류를 6가지 기능형군에 따라 구분한 결과 사상형 34.43%, 성긴분지형 25.41%, 엽상형 24.59%, 다육질형 9.71%, 각상형 5.74%, 유절산호말형 0.82%로 확인되었다. 해조상의 특성을 반영하여 해조군락 특성을 판단할 수 있는 C/P, R/P, (R+C)/P 값은 각각 0.41, 2.79, 3.21로 나타났다. 또한, 왕돌초 조하대 군집 안정도와 환경상태를 다양도지수(H')와 우점도지수(DI)를 기초로 확인한 결과 안정된 것으로 나타났다. 왕돌초 조하대에 서식하는 해조류 종다양성 및 풍부도를 유지하기 위하여 교란이나 부영양화 같은 인간활동으로부터 보호되어야 할 것으로 판단된다.

Keywords

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