• ALGAE
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• 제18권1호
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• pp.101-106
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• 2003

• ALGAE
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• 제30권4호
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• pp.325-326
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• 2015

• ALGAE
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• 제30권2호
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• pp.181-182
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• 2015

• ALGAE
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• 제27권1호
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• pp.73-73
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• 2012

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2017년도 추계학술발표회
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• pp.247-247
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• 2017

• ALGAE
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• 제21권4호
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• pp.453-461
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• 2006

This study is intended 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 Wolseong nuclear power plant on the East Coast of Korea were investigated seasonally from February 2001 to October 2005. As a result, 43 species (6 blue-green, 8 green, 9 brown and 20 red algae) of marine algae were found at the discharge canal during the past five years. In general, the number of species observed was abundant during winter to summer and less in autumn. Lyngbya confervoides and Enteromorpha compressa always occurred at the discharge canal during the past five years, and Oscillatoria brevis, Padina arborescens and Caulacanthus ustulatus were common species found more than 80% frequency during the study period. Seasonal fluctuations of mean biomass were 2-659 g dry wt m–2 and dominant species in biomass were Caulacanthus ustulatus (contribution to a total biomass proportion 37%), Enteromorpha compressa (26%) and Padina arborescens (24%). Results showed that, in the floristic composition, the green algae occurred as common algal group at the discharge canal of Wolseong nuclear power plant. In the quantitative aspect, however, the red algae such as Caulacanthus ustulatus and Ahnfeltiopsis flabelliformis appeared as predominant group at the discharge canal, in contrast to Kori nuclear power plant where there was a definite green algal dominance. Differences in algal communities developed at the discharge canals of three nuclear power plants on the East Coast of Korea can probably be related to local environmental factors.

• ALGAE
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• 제35권1호
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• pp.79-89
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• 2020

Pythium species are ubiquitous organisms known to be pathogens to terrestrial plants and marine algae. While several Pythium species (hereafter, Pythium) are described as pathogens to marine red algae, little is known about the pathogenicity of Pythium on marine green algae. A strain of a Pythium was isolated from a taxonomically unresolved filamentous Ulva collected in an intertidal area of Oslo fjord. Its pathogenicity to a euryhaline Ulva intestinalis collected in the same area was subsequently tested under salinities of 0, 15, and 30 parts per thousand (ppt). The Pythium isolate readily infected U. intestinalis and decimated the filaments at 0 ppt. Mycelium survived on U. intestinalis filaments for at least 2 weeks at 15 and 30 ppt, but the infection did not progress. Sporulation was not observed in the infected algal filaments at any salinity. Conversely, Pythium sporulated on infected grass pieces at 0, 15, and 30 ppt. High salinity retarded sporulation, but did not prevent it. Our Pythium isolate produced filamentous non-inflated sporangia. The sexual stage was never observed and phylogenetic analysis using internal transcribed spacer suggest this isolate belongs to the clade B2. We conclude that the Pythium found in the Oslo fjord was a pathogen of U. intestinalis under low salinity.

• 해양환경안전학회지
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• 제25권2호
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• pp.212-219
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• 2019

본 연구는 우리나라 제주 해역의 여름철 해조 군집 특성과 갯녹음 현황을 파악하고자 수행하였다. 연구는 2017년 7월부터 9월까지 스쿠버 다이빙(SCUBA Diving)을 이용하여 정량 조사 및 정성 조사를 시행하였다. 연구 결과 녹조류 11종(9.1 %), 갈조류 24종(19.8 %), 홍조류 86종(71.1 %) 등 총 121종의 해조류가 확인되었다. 지역별로는 형제섬이 60종으로 출현종수가 가장 많았으며, 하례가 18종으로 가장 적었다. 연구 지역의 평균 생물량은 $1,503.0g{\cdot}m^{-2}$이며, 주변 도서의 평균 생물량($3,268.7g{\cdot}m^{-2}$)이 본섬의 평균 생물량($914.7g{\cdot}m^{-2}$)보다 높았다. 우점종은 주변 도서에서 Sargassum macrocarpum, 본섬에서 Ecklonia cava로 나타나 생물량뿐만 아니라 종 조성에서도 차이를 보였다. 해조 군집 특성(종 조성, 생물량, 대형 갈조류의 생물량 비율), 무절산호말류의 피복도, 조식동물의 밀도 등을 토대로 연구 지역의 여름철 해조 군집 상태를 평가한 결과, 형제섬과 마라도 두 지역은 우수한 해조 군집을 유지하고 있는 것으로 판단되어 보전 및 지속적인 관리가 요구되며, 다른 6개 지역은 각 지역별로 해조 군집의 조성 내지 복원이 필요한 실정이다. 갯녹음 현상이 가속화됨에 따라 모니터링뿐만 아니라 현재 해조 군집의 현황 파악이 제대로 이루어지지 않은 지역을 대상으로 해양 생태계의 실태를 파악하는 일도 시급한 것으로 판단된다.

• 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.

• 수산해양기술연구
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• 제58권2호
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• pp.106-112
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• 2022

As a series of basic research to draw the pilot design measures for developing the habitat apparatus of Sulculus diversicolor supertexta inhabiting the coastal area of Jeju island, this study conducted a water tank experiment to understand the habitat marine environment of Sulculus diversicolor supertexta and the preference of habitat space focusing on the research fisheries performing the discharge of marine products. In the composition degree of marine algae in both fisheries, Donggwi-ri showed the highest gulfweed (79.3%) as brown algae and there were some coralline algae (17.2%) as red algae. Hansu-ri yielded the highest gulfweed (48.1%) as brown algae, which was followed by sea lettuce (10.4%) as green algae. In the preference of habitat space, the shelter angles 40° showed the highest adhesion as number of 82.9, which was followed by 60° and 70° as 69.2 and 68.2 respectively (P<0.05) by reviewing the environmental characteristics of habit of Salculus diversicolor supertexta in the coastal fishery of Jeju Island, when considering the adhesion rate in each of five shelters with different angles. In the future, there should be continuous research and monitoring for designing the fish shelters suitable for the coastal fisheries of Jeju island, and it would be also necessary to add the field-centered sustainable concrete research.