Korean Journal of Environment and Ecology (한국환경생태학회지)

Korean Society of Environment and Ecology (한국환경생태학회)
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Variations of Seaweed Community Structure and Distribution of Crustose Coralline Algae at Gallam, Samchuk, Eastern Coast of Korea

한국 동해 삼척시 갈남 해역의 해조 군집구조와 무절산호조류의 분포 변화

  • Received : 2013.12.16
  • Accepted : 2014.02.26
  • Published : 2014.02.28
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Abstract

This study was carried out to examine seaweed community structure and distribution of crustose coralline algae at the intertidal and subtidal zones of Gallam, Samchuk, eastern coast of Korea. Total 112 species including 14 of green algae, 33 of brown algae, and 65 of red algae were collected and identified. Among these species, 29 species were found throughout the year. The dominant species which contributed significantly to the total biomass were Ulva pertusa, Colpomenia spp., Sargassum fulvellum, Sargassum fusiforme, Sargassum muticum, Sargassum thunbergii, Corallina pilulifera, and Gelidium elegans. Annual seaweed biomass in dry weight was 66.7 $gm^{-2}$ and maximum biomass was recorded seasonally in summer (107.5 $gm^{-2}$), while minimum was recorded in autumn (36.2 $gm^{-2}$). In seaweed functional group analyses, coarsely branched form was the most dominant functional group constituting from 40.0 to 48.6% of the total flora. Ecological state group ESG II, as an opportunistic species, including sheet form, filamentous form, and coarsely branched form, consisted of 46~61 species, constituting 76.7~82.4%. Crustose coralline algae was observed throughout all seasons. Species of the crustose coralline algae were largely classified into Lithothamnion lemoineae, Lithophyllum okamurai, Lithophyllum yessoense, and Hydrolithon gardineri. The coverage of crustose coralline algae seems to be lower than that of other studies from 36.8% to 11% on average.

한국 동해안 삼척시 갈남 해역의 조간대와 조하대에 생육하는 해조류의 군집구조 변화와 무절산호조류의 분포현황을 2010년 8월부터 2011년 5월까지 계절별로 총 4회 조사하였다. 연구기간에 녹조류 14종, 갈조류 33종, 홍조류 65종이 출현하여 총 112종 채집 및 동정되었다. 이 중 29종은 일 년 내내 출현하였다. 생물량을 근거로 한 우점종은 구멍갈파래(Ulva pertusa), 불레기말류(Colpomenia spp.), 모자반(Sargassum fulvellum), 톳(Sargassum fusiforme), 몽당잎모자반(Sargassum muticum), 지충이(Sargassum thunbergii), 작은구슬산호말(Corallina pilulifera)과 우뭇가사리(Gelidium elegans)였다. 해조류의 연평균 생물량은 건중량으로 66.7 $gm^{-2}$ 이었고, 여름에 107.5 $gm^{-2}$로 최대였고 가을에 36.2 $gm^{-2}$로 최소값을 기록하였다. 기능형군 분석에서는 성긴분기형(coarsely branched form)이 전체 해조에서 40.0~48.6%를 차지하였다. 엽상형(sheet form), 사상형(filamentous form) 및 성긴분기형을 포함한 기회종인 생태학적 상태그룹 ESG II는 46~61종으로서 76.7~82.4%를 차지하였다. 각상형의 무절산호조류는 모든 계절에 출현하였으며, 대표적인 종이 혹쩍(Lithothamnion lemoineae), 혹돌잎(Lithophyllum okamurai), 납작돌잎(Lithophyllum yessoense), 나팔가시돌잎(Hydrolithon gardineri)이었다. 동해안 갈남 해역에서 무절산호조류의 피도는 선행 연구에서 36.8%였으나, 금번에 11%로서 감소하고 있음을 확인하였다.

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References

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