• 해양환경안전학회지
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• 제27권5호
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• pp.639-646
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• 2021

바다숲 복원과 함께 굴 패각의 새로운 자원화를 위해 굴 패각을 피복시킨 콘크리트 기질을 부산광역시 기장군 일광면 동백리 연안에 설치하여 약 1년간(2020년 1월~11월) 해조류 피도 변화를 모니터링하였다. 1월 모니터링 결과, 대조구인 일반 콘크리트 기질에는 해조류가 출현하지 않았다. 이에 반해 굴 패각을 10 ~ 90 % 피복시킨 실험구에는 해조류가 약 10 ~ 80 %의 피도로 착생한 것을 확인하였다. 또한, 11월 실험구의 피도는 대조구 대비 최대 49 % 높게 나타났다. 이상의 결과로부터 콘크리트 기질의 인공어초에 굴 패각 피복을 통해 인공어초의 해조류 착생을 촉진할 수 있으며, 수산 부산물인 굴 패각의 새로운 자원화 방안을 제시하였다.

• Ocean Science Journal
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• 제42권3호
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• pp.135-152
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• 2007

The ecological aspect of meiofaunal communities in Can Gio mangrove forest, Ho Chi Minh city, Vietnam has not been investigated before. The composition, distribution, density and biodiversity of meiofaunal communities were studied along an intertidal transect at the Khe Nhan mudflat. Each time, three replicate samples were collected in four stations along a transect following the water line from low tide level up to the mangrove forest edge. In total, 18 meiofaunal taxa were found with the dominant taxa belonging to Nematoda, Copepoda, Sarcomastigophora and Polychaeta. The densities of meiofauna ranged from $1156inds/10cm^2$ to $2082inds/10cm^2$. The increase in densities from the mangrove forest edge towards the low water line was significant Along the mudflat transect, the biodiversity (expressed by different indices) was relatively high at different taxonomic levels but did not vary significantly along the mudflat except for taxa richness. Eighty nematode genera belonging to 24 families with Comesomatidae having the highest abundance 33.8 % were found. Theristus and Neochromadora decreased in densities from the lower water line towards the mangrove forest edge, while Paracomesoma and Hopperia are typical and more abundant at the middle of the mudflat. Halalaimus increased from high on the mudflat to the low water line.

• 한국응용과학기술학회지
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• 제37권6호
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• pp.1489-1495
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• 2020

Gotjawal, Jeju Island, Korea is a lava-formed forest with low soil content that is unique in the world. Around 6 percent of the Jeju Iand is classified as a lava-based specific forest. The forest has been gradually disappearing during the last several decades, with approximately one half having been destroyed. Our study undertakes a detailed analysis of the landscape of the lava subsidence, and describes the fungi, vegetation, and soils of Cheongsu Gotjawal. Soil samples from the Gotjawal were collected, and soil analyses as well as pyrosequencing of the internal transcribed spacer gene for fungal communities were performed. Soil fungal communities are represented by Discisedars, Fusarium, Pleochaeta, and Fuscoporia genera. Endemic vegetation of the Gotjawal includes the plants Pleris critical, Machilus japonica, Quercus glauca, Arachniodes aristata, and Neocheiropteris ensata. Results of soil analysis indicate sandy loam with 31.70% organic matter, and 1.36 mg/kg of total nitrogen. This fundamental information can help understand the invaluable and unique nature of Cheongsu Gotjawal, and the necessity for more studies on Gotjawal.

• 환경생물
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• 제39권1호
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• pp.46-54
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• 2021

남해안의 바다숲을 구성하는 종을 확인하고 바다숲 조성에 적합한 종을 파악하기 위하여 남해안 12개 정점에서 계절별로 4개 수심에서 2018년~2019년에 걸쳐서 해조류의 생물량을 조사하였다. 해조류 생물량을 근거로 켈프종 3종과 모자반류 3종에 대해서 서식지적합지수를 계산하여 생물량과 비교하였다. 본 연구에서 바다숲을 구성하는 종은 켈프종 4종과 모자반류 12종으로 총 16종이 관찰되었다. 정점별로 해조류의 평균 생물량(계절별, 수심별 포함)은 남해 동부에서 843.73~2,925.85 g wet wt. m^-2였고 남해 서부에서 343.87~4,580.10 g wet wt. m^-2였다. 모든 정점에서 생물량 기준으로 볼 때, 켈프종에서는 감태가 가장 우점하였고 다음으로 곰피였으며, 모자반류에서는 큰열매모자반이 1위였고 괭생이모자반이 2위로 나타났다. 서식지지수는 곰피가 8개 정점에서 0.76~1.00이었으며, 감태는 4개 정점에서 0.58~0.92의 범위를 보임으로써 곰피가 감태에 비해 적합한 종으로 나타났다. 모자반류의 서식지적합지수는 괭생이모자반이 12개 모든 정점에서 0.84~1.00의 값을, 그리고 큰열매모자반이 0.68~0.99을 보였다. 본 연구의 결과 바다숲 조성에 적합한 켈프종과 모자반종은 생물량과 서식지적합지수와 약간의 차이를 보였는데, 생물량으로는 감태와 큰열매모자반이, 서식지적합지수로 보면, 곰피와 괭생이모자반이 가장 적합한 것으로 나타났다. 따라서, 본 연구를 통해서 바다숲 조성을 위한 적합종의 선택을 위해서는 해조류의 생물량과 서식지적합지수를 모두 고려해야 할 것으로 사료되며, 서식지적합지수 계산을 위해서는 향후 더 많은 연구가 필요한 것으로 나타났다.

• 한국지리정보학회지
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• 제22권4호
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• pp.146-157
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• 2019

본 연구에서는 해외에서는 각광을 받고 있는 해양치유를 국내에 적용하기 위한 시범연구로서 선정된 4개의 시범지자체를 대상으로 해사와 해수, 소금, 머드, 해조류, 산림, 기상 등 7개의 주요 해양치유 관련 자원을 수집하고 GIS 기반의 관련 DB를 구축하였다. 나아가 구축된 DB의 원활한 활용과 해양치유 관련 다양한 콘텐츠의 제공, 관련 산업의 활성화를 지원하기 위하여 웹GIS 기반의 해양치유포털을 구축하였다. 포털에는 GIS 기반의 해양치유에 필수인 해양자원의 주제도는 물론, 국내외 연구문헌, 해양치유요법 관련 매뉴얼과 시범 지자체의 해양치유 관련 다양한 프로그램 등을 포함하였다. 구축된 해양치유포털의 시범운영을 통하여 향후 국내 관련 산업의 활성화에 기여가 클 것으로 사료되었으며, 향후 해양치유자원의 확대 구축과 보다 다양한 콘텐츠의 확보를 위한 후속연구의 필요성도 대두되었다.

• Ocean and Polar Research
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• 제28권1호
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• pp.13-23
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• 2006

This study was conducted to investigate the community structure and distributional pattern of meiobenthos on the sediment of the mangrove forest and seagrass bed in the Chuuk lagoon. The samples were collected by an acryl corer at 14 stations. Nematodes were the most abundant meiobenthos, followed by ciliophorans and polychaetes; these taxa comprised more than 70% of the total abundance at all stations. The meiofuuna sampled in seagrass bed were more diverse than those of mangrove substrates. Total densities were higher in mangrove stations than other sites, averaging 1,671 to $2,967inds/10cm^2$. Densities in seagrass area ranged between 605 and $1,053inds/10cm^2$. Biomasses, however, were higher in seagrass bed $(975-2,167{\mu}g\;free\;dry\;weight/10cm^2)$ than in mangrove area $(1,064-1,180{\mu}g\;free\;dry\;weight/10cm^2)$. Ordination chart by MDS of major meiofaunal density in each station showed difference between mangrove area and seagrass area in terms of habitat of meiobenthos.

• Journal of Advanced Research in Ocean Engineering
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• 제2권4호
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• pp.169-178
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• 2016

Recently, artificial reefs (ARs) have been frequently used primarily owing to the development in AR materials and projects for relatively complicated, large ARs. Among several engineering issues of ARs, wake region of an AR has been characterized because these regions have a high probability of recruiting seaweed spores, providing an energy saving zone, and facilitating deposition of sediments, nutrients, and bio-deposits. To characterize an efficiency index of an AR wake region and its dependency on the prevailing water flow directions, this study proposes a so-called efficiency index diagram. This characterization is done by normalizing the wake volumes with respect to the real AR volume and illustrating how efficiency indices vary with respect to the inlet flow directions. As a result, according to the diagram characteristics such as an averaged efficiency index, fundamental symmetric angle, secure angles, and principal directions, we can easily figure out how a target AR should be aligned along the main water flows to maximize the wake region around the AR. In addition, six ARs are considered and their efficiency index diagrams are illustrated to pinpoint the physical characteristics.

• 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.

• 한국환경과학회지
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• 제24권10호
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• pp.1285-1307
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• 2015

We constructed marine forest to restore barren grounds which are expanding in the east coast of Korea using 2 methods of (1)seedlings transplantation method and (2)underwater floating ropes method. We transplanted 3 macroalgae species, Ecklonia cava, Undaria pinnatifida, and Saccharina. japonica to construct marine forest. Blade length of Undaria pinnatifida on underwater floating ropes was $56.70{\pm}8.69mm$ in April and grew $68.75{\pm}22.30mm$ in May and $70.75{\pm}14.36mm$ in July. Blade length of S. japonica was shown 97.95-143.00mm in April to June. Blade length of Ecklonia cava was $30.50{\pm}1.91mm$ in May, $41.55{\pm}1.84mm$ in August, $45.30{\pm}2.57mm$ in November, 2009 and $45.30{\pm}1.99mm$ in February, 2010. The survey on Dangsa area, Ulsan-city in January, 2009 found a total number of 15 algal species(1 brown algae, 14 red algae species) with the highest variety at 5m depth of A station and the lowest at 8m depth of A and B stations. The March survey showed a total of 24 species (1 green algae, 1 brown algae, 22 red algae species) with the highest variety of 11 at depths of 3m and 5m of B station and the lowest of 6 at 10m of B station. In May, total biomass was 3,755.4g (green algae 1.2g, brown algae 199.0g, red algae 3,555.2g). From January, 2009, we found that E. cava was dominant at the depths of 3m and 5m of A and B stations while Peyssonnelia capensis was dominant at the depth of 8m of A station. The 8m depth of B station was dominated by Acrosorium polyneurum. In May, Grateloupia lanceolata was dominant at 8m depth of A station while other depths were dominated by Phycodrys fimbriata. In June, the dominant species were G. lanceolata at the 3m depth, E. cava at the 5m and P. fimbriata at the depths of 8m and 10m of A station. Under B station, G. lanceolata was dominant at the depths of 3m and 5m while P. fimbriata was dominant at the depths of 8m and 10m.

• 한국환경과학회지
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• 제19권2호
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• pp.217-227
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• 2010

This paper was studied $CO_2$ respiration rate with physicochemical properties of soils at wetland, paddy field and forest in Nongju-ri, Haeryong-myeon, Suncheon city, Jeollanam-do. Soil temperature and $CO_2$ respiration rate were measured at the field, and soil pH, moisture and soil organic carbon were analyzed in laboratory. Field monitoring was conducted at 6 points (W3, W7, W13, W17, W23, W27) for wetland, 3 points (P1, P2, P3) for paddy field and 3 points (F1, F2, F3) for forest in 10 January 2009. $CO_2$ concentrations in chamber were measured 352~382 ppm for wetland, 364~382 ppm for paddy field and 379~390 ppm for forest, and the average values were 370 ppm, 370 ppm and 385 ppm, respectively. $CO_2$ respiration rates of soils were measured $-73{\sim}44\;mg/m^2/hr$ for wetland, $-74{\sim}24\;mg/m^2/hr$ for paddy field and $-55{\sim}106\;mg/m^2/hr$ for forest, and the average values were $-8\;mg/m^2/hr$, $-25\;mg/m^2/hr$ and $38\;mg/m^2/hr$. $CO_2$ was uptake from air to soil in wetland and paddy field, but it was emission from soil to air in forest. $CO_2$ respiration rate function in uptake condition increased exponential and linear as soil temperature and soil organic carbon. But, it in emission condition decreased linear as soil temperature and soil organic carbon. $CO_2$ respiration rate function in wetland decreased linear as soil moisture, but its in paddy and forest increased linear as soil moisture. $CO_2$ respiration rate function in all sites increased linear as soil pH, and increasing rate at forest was highest.