• Fisheries and Aquatic Sciences
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• 제12권2호
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• pp.130-137
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• 2009

Temporal variations of seaweed biomass and coverage were seasonally examined at Ongdo in the Yellow Sea, Korea from August 2006 to April 2008. Average seaweed biomass was 245.79 g/$m^2$ in wet weight and coverage was 16.49% with seasonal variations from 13.97% in spring to 18.55% in autumn. Seaweeds were distributed across the shore gradient from the high intertidal to 10m depth in the subtidal zone. Biomass was always higher in the subtidal zone (310.24 g/$m^2$) than in the intertidal zone (181.35 g/$m^2$). Of total seaweed biomass, 76.52% (first year) and 80.32% (second year) occurred from the low intertidal zone, down to depth of 1 to 5m. Gelidium amansii had the highest importance value and biomass, and sub dominant species were Chondrus ocellatus and Chondria crassicaulis. Coarsely-branched seaweeds comprised the highest proportion of biomass (214.84 g/$m^2$, or 87.41% of the total biomss). Seasonal variations in algal biomass were largely explained by fluctuations in the biomass of coarsely-branched and thick-leathery forms. In conclusion, seaweed biomass of Ongdo shore was very low because of perennial G. amansii showing low biomass as compared to kelp or Sargassum spp. However, these results indicate Ongdo is good place to grow seaweeds because coarsely-branched form seaweeds including G. amansii are dominant at unpolluted and clean environment.

• 수산해양교육연구
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• 제27권1호
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• pp.273-283
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• 2015

This study was carried out to examine the species composition and community structure of benthic marine algae at the subtidal zones of Daepo, Wolpyeong, Wimi and Jigwido in south Jeju, Korea from March to December 2009. Total 87 species including 14 green algae, 23 brown algae, and 50 red algae were collected and identified. Among these species, 9 species were found throughout the year. The dominant species which contributed significantly to the total biomass were Ecklonia cava, Undaria pinnatifida, Peyssonnelia capensis, Cladophora wrightiana, Sargassum serratifolium, Grateloupia angusta, Codium coactum, Plocamium cartilagineum, and Sargassum macrocarpum. The average seaweed biomass was 7,578.2 g wet weight $m^{-2}$ and maximum biomass was recorded seasonally in spring ($9,627.6g\;m^{-2}$), while minimum was recorded in autumn ($5,963.0g\;m^{-2}$), by sites maximum biomass Jigwido ($12,889.9g\;m^{-2}$), while minimum was recorded in Daepo ($5,403.8g\;m^{-2}$). The seasonal and regional flora were investigated as six functional groups. A coarsely branched form was the most dominant functional group constituting from 42.9~52.8% of the total flora. Ecological state group (ESG) II, as an opportunistic species, including sheet form, filamentous form, and coarsely branched form, consisted of 31~59 species, constituting 77.5~84.9%.

• 한국환경과학회지
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• 제21권11호
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• pp.1407-1418
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• 2012

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 $8.3^{\circ}C$, $11.2^{\circ}C$, and $13.1^{\circ}C$, 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.

• 환경생물
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• 제30권4호
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• pp.339-348
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• 2012

제주도와 추자도에 자생하는 보호대상해양생물인 잘피 자생지의 서식 현황을 조사하기 위해 2011년 7월 GPS를 활용하여 서식면적을 기록하였고, 직접적인 잠수 조사로 서식 현황을 확인하였다. 잘피가 자생하는 곳은 해수와 퇴적물 공극수의 영양염 분석과 함께 분포 면적, 종조성, 형태적 특성, 밀도와 생물량을 조사하였다. 추자도에는 3종의 거머리말속 잘피(거머리말, 수거머리말, 포기거머리말)가 출현한 것에 비하여 제주도에는 거머리말 한 종이 동북연안에서만 서식하고 있었다. 제주도의 거머리말 서식면적은 $238,572m^2$이고, 추자도의 잘피 서식면적은 $23,584m^2$로 수거머리말이 $21,216m^2$, 포기거머리말이 $1,870m^2$, 거머리말이 $498m^2$를 차지하고 있었다. 제주도와 추자도의 거머리말은 조간대부터 조하대 평균 수심 5m까지 출현하였다. 추자도의 포기거머리말과 수거머리말은 각각 조하대 평균 수심 3~4m와 4~6m에서 출현하였다.

• 한국수산과학회지
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• 제51권3호
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• pp.262-277
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• 2018

We seasonally examined marine macroalgal community structures and ocean environmental characteristics in subtidal zones at five sites on and around Jeju Island, Korea, from February 2013 to November 2015. A total of 186 macroalgal species were identified, including 18 green, 33 brown, and 135 red algae. During the study period, the number of species was highest at Gapado Island (125 species) followed by Bukchon (123 species), Sagye (122 species), Sinheung (122 species) and Sinchang (97 species). Ecklonia cava, Peyssonnelia caulifera, Synarthrophyton chejuense, Corallina aberrans and Corallina crassisima occurred at all study sites and in all seasons. The average annual biomass of seaweed was $1,125.10g\;wet\;wt./m^2$ and ranged from $899.77g/m^2$ at Sinheung to $1,452.00g/m^2$ at Gapado. A brown alga E. cava was the most dominant species, accounting for 49.84% ($560.78g/m^2$) of the total seaweed biomass. Subdominant species were C. aberrans and C. crassissima, comprising 6.83% ($76.79g/m^2$) and 5.98% ($67.28g/m^2$) of total biomass, respectively. Cluster analysis revealed three distinct groups: the Sagye/Sinheung group (group A), the Bukchon/Sinchang group (group B), and the Gapado group (group C), indicating significantdifferences in macroalgal communities between sites.

• ALGAE
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• 제23권4호
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• pp.295-300
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• 2008

Seaweed biomass was estimated using a nondestructive method in the rocky subtidal zones in Munseom, Jeju Island, Korea from July 2006 to April 2008. Seasonal samplings were done at the depth of 1, 5, 10 m using 50 x 50 cm quadrat. Mean biomass was comprised of 2,784 g wet wt m$^{-2}$ and the biomass values varied seasonally from 1,176 g wet wt m$^{-2}$ to 4,217 g wet wt m$^{-2}$ with the highest point in April. Biomass reached maximum at 5 m depth in spring, but was shifted to 10 m depth in summer. Common seaweeds appeared year round in Munseom were Codium minus, Ecklonia cava, Sargassum spp., articulated corallines and Plocamium telfairiae. Among them, E. cava showed the highest biomass (average of 1,288 g wet wt m$^{-2}$), comprising 4% of total biomass. Only 12 species’' biomass covered 98% of total value, which indicated the contribution of few common species to algal community. Seaweed biomass in Munseom represented one of the highest values in coastal regions in Korea.

• 한국수산과학회지
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• 제44권6호
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• pp.740-746
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• 2011

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.

• 한국어류학회지
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• 제28권4호
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• pp.273-278
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• 2016

본 연구는 진해 잠도주변 조하대 암반서식지에서 통발에 의해 채집된 어류 군집의 종조성과 계절을 조사하였다. 어류 시료는 2007년 9월에서 2008년 7월까지 통발로 매월 채집하였다. 조사기간 동안 24과에 속하는 48종의 어류가 채집되었다. 우점종은 흰꼬리볼락(Sebastes longispinis), 가시망둑(Pseudoblennius cottoides), 볼락(Sebastes inermis), 그물코쥐치(Rudarius ercodes), 망상어(Ditrema temminckii), 세줄베도라치(Ernogrammus hexagrammus)였으며, 이들 6종은 총 채집 개체수의 71.0%를 차지하였다. 어류 군집의 현존량과 다양도는 계절변동을 나타냈는데, 출현종수, 개체수, 다양도는 가을철에 가장 높았고, 생체량은 봄에 높았다. 우점종의 현존량은 계절별로 차이를 보였는데, 흰꼬리볼락은 봄과 여름에 현존량이 높았고, 가시망둑은 가을과 봄에 높았다. 볼락은 9월, 12월, 5월에 높은 현존량을 보였고, 그물코쥐치는 대부분 개체가 가을에만 출현하였다.

• 한국지역지리학회지
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• 제12권3호
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• pp.339-351
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• 2006

뻘중심의 갯벌이 넓게 형성된 가로림만의 웅도리외 모래 갯벌과 염전이 발달한 영광 갯벌의 두우리, 수산 양식업이 발달한 곰소만 주변 지역을 대상으로 조석 주기, 갯벌 지형. 갯벌 퇴적물의 입도 특성과 주민 생활과의 관련성을 검토했다. 갯벌 주변 주민들에게 갯일은 농사일보다 우선되고, 갯벌에서 얻어지는 수입이 이들의 주소득원이다. 갯벌주변의 주민 생활은 조석 주기에 맞추어 이루어지고 있으며, 한사리 저조위 때는 가장 바쁘고 많은 소득을 올릴 수 있어 마치 장날과 같다. 뻘 갯벌에서는 패류 양식이 주이고, 모래 갯벌에는 안강망 어업이 활발하며, 해안에 접한 혼합 갯벌에는 염전이 발달한다. 또한 하나의 갯벌에도 경제 활동의 분화가 이루어져 조상대에는 염전과 양어장으로, 조간대에는 패류 양식장으로, 조하대는 굴, 김 양식징으로 이용된다.

• 한국습지학회지
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• 제8권3호
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• pp.51-65
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• 2006

연구지역에서 2003년 8월에 199개 정점에서 표층퇴적물을 채취하여 분석하였다. 표층 퇴적물은 6개의 퇴적상으로 구성되어 있었다. 일반적으로 모래 펄 퇴적물이 강화 남단 갯벌에서 우세하였고 모래 퇴적물은 강화도 서부의 수로와 조하대에서 우세하였다. 이 지역의 1997년 퇴적상과 비교하여 모래펄 퇴적물은 갯벌의 동쪽으로 확장 되었다. 강화 남단 갯벌과 주변부 30 정점의 표층퇴적물에서 살아있는 유공충 34종을 포함하여 총 61종의 유공충이 확인되었다. 살아있는 유공충에서는 Ammonia beccarii와 Elphidium etigoense, 전체군집에서는 Ammonia beccarii, Elphidium etigoense, Jadammina sp.와 Textularia earlandi가 연구지역에 넓게 분포한다. 일반적으로 개체수와 종 다양성은 갯벌의 서부에서 상대적으로 높은 수치를 나타냈다. 전체 유공충 군집의 집괴분석 결과 4개의 생물상으로 구분되었다. 생물상 1은 강화 남단의 동부 갯벌, 생물상 4는 강화 남단의 서부 갯벌의 저서환경을 나타냈다. 생물상 3은 생물상 1과 4의 전이환경으로 보여 진다.