• 한국수산과학회지
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• 제47권6호
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• pp.960-972
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• 2014

Marine algal flora and community structure were seasonally investigated at Oryukdo, on the southeast coast of Korea, from March 2011 to February 2014. A Total of 66 seaweed species including 6 green, 7 brown and 53 red algae were identified and 23 species were found throughout the survey period. Seaweed biomass was maximal during summer in 2012 (2276.2 g wet weight $m^{-2}$) and minimal in winter in 2012 (9.1 g wet weight $m^{-2}$). The dominant species in term of biomass were Undaria pinnatifida, Dictyopteris prolifera, Dictyota dichotoma, Sargassum horneri, Rhodymenia intricata, Acrosorium polyneurum, and Polyneura japonica during the suvery period. The flora could be classified into six functional groups: coarsely branched form (30.3%), filamentous form (24.2%), thick leather form (19.7%), sheet form (15.2%), jointed calcareous form (7.6%), and crustose form (3.0%). The numbers of marine algal species in the Oryukdo area were markedly reduced when compared with previous studies at Dongbaekseom in 1971. These results suggest possible future changes in the algal vegetation, considering the physical and chemical pollution loadings in the coastal marine environment of this area.

• 한국수산과학회지
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• 제51권5호
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• pp.571-578
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• 2018

Seasonal variability in algal community structure of the subtidal zone was examined at four study sites on the southeastern coast of Korea from February to November 2016. A total of 81 species of algae (8 green, 12 brown, and 61 red) were indentified. During the study period, the greatest number of species was observed at Sinamri (57 species) followed by Daesongri (50 species), Dongbaekri (47 species) and Gangyangri (42 species). Of the six functional seaweed forms, the coarsely-branched form was the most dominant, accounting for about 43% of the total species at Daesongri. The annual average biomass in wet weight varied from $700.59g/m^2$ at Sinamri to $1,712.45g/m^2$ at Daesongri. The parameters of seaweed community structures were as follows: dominance index (DI), 0.30-0.54; richness index (R), 4.92-7.05; evenness index (J'), 0.54-0.72; and diversity index (H'), 2.05-2.91.

• 한국수산과학회지
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• 제43권3호
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• pp.246-253
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• 2010

The marine algal flora and community structure were investigated at three sites in Ulsan on the southeast coast of Korea between August 2005 and July 2006. Ninety-one benthic algae species were identified, including 14 Chlorophyta, 21 Phaeophyta, and 56 Rhodophyta species. Of the 91 seaweeds, 19 species were found throughout the survey period. The wet weight biomass ranged from 310.8 to 2,960.4 g $m^{-2}$ during the study period. The maximum biomass was recorded at Sinri, and the minimum was recorded at Daesong. The R/P, C/P and (R+C)/P values reflecting flora characteristics were 2.67, 0.67, and 3.33, respectively. The flora investigated could be classified into six functional groups: coarsely branched (46.2%), thick leathery (22.0%), filamentous (16.5%), Sheet (7.7%), jointed calcareous (4.4%), and crustose (3.3%) forms. A cluster analysis produced two groups that differed meaningfully: one included the site Sinri-summer and the other included the sites Daesong and Jinha.

• 수산해양교육연구
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• 제24권6호
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• pp.920-933
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• 2012

Marine algal flora and community structure were investigated seasonally at four stations in Busan, in which coastal area and estuary affected by Nakdong river are involved, from February 2011 to October 2011. Total 78 species including 9 of cholophyta, 17 of phaeophyta and 52 of rhodophyta were found during the study period. Maximum and minimum species number were recorded at station 1(57 species) and at 3(32 species). As based on the cluster analysis, grouping pattern between the four stations was significantly affected by season and Nakdong river run off. At station 3 directly exposured on Nakdong river run off, species diversity was relatively low and dominant species were similar throughout four seasons. However, coverage at the station was relatively high because of Ulva bloom. This difference results from salinity and nitrates concentrations closely related with river runoff controlled according to precipitation. Marine algal coverage was high at lower salinity and higher nitrate concentration. In conclusion, the spatio-temporal distribution of benthic marine algae in estuary of Nakdong river was mainly determined by the precipitation and river run off with the seasons, whereas that in coastal area was seasonally affected by general physical, chemical, biological and dynamic factors.

• 한국패류학회지
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• 제26권3호
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• pp.185-199
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• 2010

Correlation between community structure of herbivore and succession of macro-algal flora was examined in subtidal area of Dang-Sa Province, eastern coast of Korea from April 2008 to December 2009. For examination, the authors hypothesized that there are significant correlation between the foregoing two variables. Samplings were conducted every two months quantitatively with SCUBA diving at -3, -6 and -10 depth in the two line transects (barren and forest grounds). As results, rhodophyts was predominated in the algal flora based on the number of species and biomass; molluscs was predominated in the herbivores based on the number of species and echinoderms was predominated in that based on the biomass. There was no significant correlation between the foregoing two variables in the whole survey area and barren/forest grounds. Consequently, the hypothesis was rejected. The authors proposed that examination of correlation between the foregoing two variables should focus on the specific herbivore group(s) (e.g., amphipods) afterward.

• 한국수산과학회지
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• 제54권1호
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• pp.101-106
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• 2021

The marine algal flora and community structure of Dadohaehaesang National Park, the Southwestern coast of Korea, were investigated monthly during May, July and September 2012. As the results, a total of 86 species including 10 greens, 17 browns and 59 reds was identified, except for blue-greens and crustose reds. The seaweeds that commonly appear during the investigation period are the green algae Ulva australis, the brown algae Ishige okamurae, Myelophycus simplex, Sargassum fusiforme and S. thunbergii and the red algae Gelidiophycus freshwateri, Gelidium. elegans, Corallina officinalis, C. pilulifera, Caulacanthus ustulatus, Ahnfeltiopsis flabelliformis, and Chondrus ocellatus. In Jodo district (Yemiri, Changuri), Ulva australis and Gloiopeltis furcata were dominant species in May, Sargassum fusiforme and Ulva australis were dominant in July, and Gelidiophycus freshwateri and Ulva australis were dominant in September. In Soan/Cheongsan district (Hwaheungpo, Jungdori), Gloiopeltis tenax and Chondracanthus tenellus were dominant species in May, and Gloiopeltis tenax and Chondracanthus tenellus were dominant in July as well as in the spring. And the Caulacanthus ustulatus and Corallina sp. were dominant species in September.

• 생명과학회지
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• 제32권9호
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• pp.721-728
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• 2022

본 논문은 제주연안에서 채집한 소라(Turbo cornutus)의 장내세균을 분리하고 군집의 다양성을 조사하였다. 표준배지를 사용하여 순수 정체 배양 결과 MA agar에서 가장 많은 군집을 나타났다. 일반 배양 CFU값은 평균 1.8×10⁵, 혐기 배양 CFU값은 평균 0.4×10으로 보다 적게 나타났다. 기존 표준균주와 16S rDNA sequence 유사도 비교 분석 결과 크게 4문 12과 26속 67종으로 분류되었다. 표준균주와의 상동성 범위는 93-100%로 나타났다. 소라장내세균 군집은 크게 Proteobacteria 39% (α-proteobacteria; Phyllobacteriaceae (1), Rhodobacteraceae (8) / γ-proteobacteria; Alteromonadaecae (1), Shewanellaceae (4), Vibrionaceae(12))로 가장 우점하였고, Firmicutes 34% (Bacillaceae (21), Paenibacillaceae (2)), Actinobacteria 21% (Cellulomonadaceae (1), Mycobacteriaceae (6), Nocardiaceae (4), Streptomycetacea (3)), Bacteroidetes 6% (Flavobacteriaceae (4))로 각각 나타났다. Bacillus sp., Vibrio sp.이 가장 우점 하였으며, 그 외 대부분의 분리 균주는 해양 유래 관련 균주로 나타났다. 이전 보고된 제주 연안에 서식하는 해양동물 장내세균군과 비슷한 양상을 보였다. 분리된 일부 균주가 단당류(Cellulose), 다당류(alginate, agar)분해능을 갖고 있는 것으로 나타났는데, 대부분이 해조류 유래 세균으로 소라의 섭이가 장내세균군과 관련됨을 알 수 있었다. 동시에 probiotics 기능을 갖고 있는 일부 균주도 분리되었다.

• 수산해양기술연구
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• 제33권4호
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• pp.298-310
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• 1997

마산만의 4개 정점에서 1994년 3월부터 1996년 12월까지 2~3월 간격으로 14회에 걸쳐 21개의통발과 5폭의 저층자망어구를 이용하여 저서어개류의 군집특성을 조사하였다. 통발에 채집된 종은 0~10종으로 불가사리, 게류, 붕장어, 볼락, 노래미, 망둑 및 베도라치 등이었고, 단위 통발당 개체수는 0~46마리였으며 우점종은 S1정점의 납작게와 다른 정점의 불가사리였다. `95년에 출현 종과 개체수가 비교적 많았으나, `94년 3월과 7월 및 `96년 8월에 S1정저메서 생물이 채집되지 않았다. 자망구어에 채집된 종는 0~7종으로 갯가재, 해파래, 도다리, 불가사리, 민꽃게, 및 해조류 등 이었고, 단위 폭당 개체수는 0~30마리였으며 우점종은 해파리와 갯가재엿다, `94년 7월에는 S1정점에서 그리고 `96년 8월 및 12월에는 S4정저메서서 생무링 체포되지 않았으나, `95년 8월과 `96년 8월에는 S1정점에서 고등어, 멸치, 전어, 숭어 등이 저층자망에 포획되기도 하였다. 가장 오염이 심한 S1정점에서 `94년 11월에 통발당 50여 마리의 납작게가 들었으며 이후에도 개체수는 줄었으나 지속적으로 포획되었고, `96년 8월에는 고등어, 숭어, 전어 등의 군집이 빈번하게 형성되었다, 그리고 S1정점에서 도다리, 노래미, 갯가재, 꼼치 등의 치어사 `95년과 `96년의 4~8월에 많이 들었으나 특이하게도 불가사리는 1마리도 채집되지 않았다. 종다양성지수(H`)는 60여회의 조사중 80% 이상이 1.0 이하로 나타났다. 정점별 비교에서 톨발에 의한 군집 안정도는 S1정점에서 가장 낮고 다른 정점에서는 유사한 수준으로 높았지만, 자망의 경우는 S1과 S4정점에서 유사한 수준으로 낮고, S2과 S3정점에서 유사한 수준으로 높게 나타났으며 계절별 큰 차이가 없었다. 그리고 경년별 비교에서 통발의 경우에는 거의 차이가 없으나, 지망의 경우 `95년이 다른 해보다 군의 댜양도가 현저하게 큰 것으로 나타났다. 조사결고를 종합하여 보면 마산만에서의 어개류 군집은 납작게, 해파리, 불가사리, 갯가재 등이 탁월하게 우접하는, 안정도가아주낙은 군집을 하고있는 것으로 나타났다. 그리고 `94년 3월에서 `96년 12월까지 뚜렷한 어개류 서식환경의 개선 징후느 나타나지 않았으나, 마산만에 서식하는 어개류는 이곳의 오염된 서식환경에잘 적응하여 산란.서식하며, 또 회유성 어개류는 주로 외적 요인에 의한 계절 및 경년변동을 하는 것으로 유추된다.

• ALGAE
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• 제19권3호
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• pp.257-270
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• 2004

In order to clarify the structure and seasonal dynamics of warm tolerant benthic marine algal community in Korea, the species composition and biomass of marine algae at the discharge canal of Uljin nuclear power plant on the East Coast of Korea were investigated seasonally from February 1992 to October 2000. 107 species of marine algae were found at the discharge canal during the past nine years. In general, the number of species observed was abundant in spring or summer and less in autumn or winter. 27 species (4 blue-green, 5 green, 6 brown and 12 red algae) of marine algae occurred more than 1/ 6 frequency and thus can be categorized as warm tolerant species. Among these, one brown (Dictyota dichotoma) and four red algae (Gelidium amansii, Anphiroa ephedraea, Hydrolithon sargassi, Marginisporum crassissimum) are recorded as warm tolerant marine algae for the first time in Korea. Padina arborescens, Anphiroa zonata and Corallina pilulifera were common species found more than 75% frequency. Seasonal fluctuations of mean biomass were 0-1,330 g dry wt m^(-2) and dominant species in biomass were Corallina pilulifera (contribution to a total biomass proportion 34%), Anphiroa zonata (23%), Padina arborescens (18%) and Sargassum micracanthum (11%). The red algae appeared as predominant algal group at the discharge canal of Uljin nuclear power plant in the qualitative and quantitative aspects. The green algae such as Enterornorpha compressa appeared rather frequently at the discharge canal, but the biomass proportion was very low, in contrast to Kori nuclear power plant where there was definite green algal dominance. Differences in algal communities developed at the discharge canals of Uljin and Kori nuclear power plant on the East Coast of Korea, particularly biomass proportions of green algae, can probably be related to local environmental factors such as water velocity through the canal and natural seawater temperatures.

• ALGAE
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• 제22권4호
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• pp.297-304
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• 2007

This study is intended to clarify the effects of heated effluents on intertidal benthic marine algal community in Korea. The species composition and biomass of marine algae at the discharge canal of Gori nuclear power plant on the southeastern coast of Korea were investigated seasonally from February 2001 to October 2006. As a result, 54 species (7 blue-green, 12 green, 9 brown and 26 red algae) of marine algae were found at the discharge canal during the past six years. In general, the number of species observed was abundant during winter to spring and less in autumn. Enteromorpha compressa, E. intestinalis, E. prolifera and Caulacanthus ustulatus were common species found more than 80% frequency during the study period. Seasonal fluctuations of mean biomass were 1-440 g dry wt m–2 and dominant species in biomass were Enteromorpha spp. (contribution to a total biomass proportion 28%), Sargassum horneri (14%) and Amphiroa beauvoisii (14%). It is evident from the floristic composition and biomass data that unique micro-environment of the discharge canal support different communities from those on the intake or control area. Results from the large numbers of surveys before and during plant operation showed that, in the regions influenced by thermal effluents such as the discharge canal of power plants, the process of ecological succession has been proceeded. It is assumed that the uni-directional water flow and the time of overhaul largely affect the development and succession of benthic marine algal communities of the discharge canal.