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Seasonal variation in marine macroalgal community structure was examined at the intertidal zones of Heuksando and Hongdo, Shinan, Korea, from July 2008 to May 2009. In total, 86 macroalgal species were identified, including 12 green, 19 brown, and 55 red algae; 67 species at Heuksando and 70 species at Hongdo, were observed. Annual seaweed biomass...
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The aim of this work was the study of the proximate composition and profile of fatty acids, minerals, and some microbiological aspects of four edible seaweed species (Chondrus crispus, Palmaria palmata, Porphyra sp., and Ulva sp.) available in the Portuguese market for food consumption, and produced in a national Integrated Multi-Trophic...
The effects of different algal diets on the mortality, apparent ingestion, weight, length and conversion rates of the European abalone (Haliotis tuberculata) maintained in a semi-closed seawater system throughout the year were compared. Various combinations of red algae (Palmaria palmata, Ceramium rubrum and Chondrus crispus cultured or harvested f...
This study aimed to develop new canned chub mackerel products incorporating edible seaweeds (Ascophyllum nodosum, Fucus spiralis, Saccorhiza polyschides, Chondrus crispus, Porphyra sp. and Ulva sp.) harvested in the Portuguese North-Central coast, with simultaneous sensory improvement and minerals enrichment. Two processes were compared, namely the...
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... According to the literature, S. siliquosa is distributed not only along the west and south coasts of Korea but also in many areas of the east coast such as Naksan, Busan, Geoje, and Jeju [5,[22][23][24][25][26][27][28]. Recently, intertidal habitats have been damaged due to coastal development, industrial complex construction, marine pollution, rising seawater temperatures due to global warming, land reclamation, and the inflow of domestic wastewater, making it difficult to find habitats near the mainland coast [29][30][31][32]. ...
We aimed to analyze the natural population characteristics and habitat growth conditions of the valuable seaweed Silvetia siliquosa. Its population characteristics and habitat conditions were assessed monthly from May 2022 to April 2023 and April to August 2022, respectively, on selected habitats. The average population density, coverage, and frequency of S. siliquosa were 579 ± 94.18 ind./m2, 27.82 ± 6.92%/m2, and 78.37 ± 5.98/m2, respectively. The average thallus length and width were 47.53 ± 4.35 and 46.33 ± 4.17 mm, respectively, while the branch width, thickness, and frequency were 2.35 ± 0.03 mm, 0.59 ± 0.12 mm, and 2.8 ± 0.2 times, with a receptacle length and width of 24.13 ± 2.07 and 2.81 ± 0.19 mm, respectively. Among the 40 previously known natural habitats of S. siliquosa, growth was confirmed only in Sepo, Sebang, and Bangpo. The causes for the declining S. siliquosa populations could be attributed to habitat changes due to construction, coastal road maintenance projects, habitat disturbances, and increased pollutants. Habitat substrate disturbances and changes were the main causes of the decrease in S. siliquosa growth. Studies on environmental factors and habitat degradation, growth related to environmental factors, mass cultivation, and the marine ecosystem restoration of S. siliquosa are needed.
... The first study on the marine algae of the southwest coast of Korea is the subject of the book Jasan-eobo, written by Yak-jeon Jeong, which lists 35 marine algae species from Heuksan-do, Korea (Seo, 2014;Choi, 1992). Since then, Kang (1966), Uhm (1968), Kang and Song (1984), Lee and Park (1986), Lee et al. (1987a), Kang et al. (1993aKang et al. ( , 1993b, and Oh et al. (2013) carried out similar studies. ...
This study was conducted to provide marine algal community and floristic boundary of Gageo–do and nearby islands in the southwest coast of Korea from August 2013 to March 2015. There were 136 marine algae species collected in this study, including 11 green algae (8.09%), 30 brown algae (22.06%), and 95 red algae (69.85%). This study confirms that the current number of marine algae species in 277. According to the functional form group and ESG analysis, the ESG II ratio for sheet–like species, filamentous species, and coarsely–branched species was 86.03%, in which most functional groups were composed of opportunistic species. The value of C/P, R/P, and (R+C) /P were 0.44, 2.54 and 2.99, respectively, indicating the characteristics of a temperate mixed marine algal flora. Based on the species reported in this study and previous studies, the appearance rates of subtropical and warm tolerant benthic marine algae showed no correlations an increase of water temperature. The cluster analysis of marine algae of 13 islands divided the West Sea and South Sea at a similarity of 40% in species composition. Notably, the presence of Ecklonia cava, Rugulopteryx okamurae, and Corallina crassissima was important to distinguish the marine algae of the West Sea and South Sea. It is assumed that the southwestern coastal area acts as a transition zone between the West Sea and South Sea floristic regions. Therefore, marine ecological research and monitoring of the change in water temperature and marine organisms at Gageo–do are urgently needed, as the island is important not only for its geography but also in relation to its surrounding ocean currents, water temperature, and marine biodiversity.
... , 92 , 114 , 124 , 67 , 70 (Choi et al., 1994;Oh et al., 2013), 57 , 89 , 80 (Oh et al., 2014). ESG II ( , ) (Arévalo et al., 2007;Pinedo et al., 2007, Wells et al., 2007. ...
... (3.9%, 3.3%), (3.7%, 2.7%) (Sohn, 1987 Kim et al., 2013;Oh et al., 2013), , , 100 g dry wt./m 2 (Lee et al., 2007b;Choi et al., 2008;Wan et al., 2009). (Koh, 1990), 4 ( , , , ) 50.85 g dry wt./m 2 (Song et al., 2011) , • , . ...
... (R+C)/P (Oh et al., 2013;Yoo et al., 2014Yoo et al., , 2015, C/P, R/P, (R+C)/P (Oh et al., 2013;Yoo et al., 2014), . ...
Seasonal variations in seaweed communities were examined at Gwanmaedo and Yeongsando, Korea, from May 2014 to February 2015. Eighty-nine species were identified, including 11 green, 20 brown and 58 red algae. Seventy-three and 74 species were identified at Gwanmaedo and at Yeongsando, respectively. Sargassum thunbergii and Myelophycus simplex were the dominant species, comprising 60.89 and 39.50% of total biomass, respectively, and S. fusiforme was subdominant at the two sites. Of six functional seaweed forms, the coarsely-branched form was the most dominant, forming about 43% of the species number at Gwanmaedo and Yeongsando. Seasonal seaweed biomasses ranged between 53.10 and 172.85 g/m? (average 93.57 g dry wt./m?) and between 83.11 and 176.20 g (138.21 g/m?) at Gwanmaedo and Yeongsando, respectively. The vertical distribution from the high to low intertidal zone was S. thunbergii and Gloiopeltis furcata; M. simplex and S. thunbergii; and S. fusiforme at Gwanmaedo. Seaweed zonation was distinct at Yeongsando, with S. thunbergii and Gelidiophycus freshwateri; M. simplex and S. thunbergii; and S. thunbergii and S. fusiforme. Seaweed biomass, evenness index (J'), and diversity index (H') values were greater at Yeongsando (138.21 g/m?, 0.51, 2.18 respectively) than at Gwanmaedo (93.57 g/m?, 0.48, 2.04), indicating that the seaweed community at Yeongsando is more stable than that at Gwanmaedo.
... ) (Oh et al., 2013). , ...
Seasonal variation in marine macroalgal community structure was examined at the intertidal zones of Geumgap, Jindo, Korea, from October 2013 to August 2014. In total, 56 macroalgal species were identified, including 9 green, 12 brown, and 35 red algae. Annual seaweed biomass was 548.96 g wet wt. /m^2 with seasonal range between 371.08 g wet wt. /m^2 at summer and 32.91 g wet wt. /m^2 at winter. The dominant seaweed in terms of biomass was Sargassum thunbergii and subdominant species were Gelidium elegans, Sargassum fusiforme, and Ishige okamurae. The vertical distribution of seaweeds from the upper to lower intertidal zones was Gloiopeltis spp., Ulva spp.- S. thunbergii, S. fusiforme, Ishige okamurae - S. thunbergii, S. fusiforme, G. elegans. Annual seaweed coverage, richness index (R), evenness index (J`), and diversity index (H`) values were 27.95%, 6.10, 0.38, and 1.38, respectively. Coarsely branched form was the most dominant functional group in terms of species number and biomass among benthic macroalgal species.
... . C/P 0.65, R/P 2.35 , (R+C)/P 3.00 . Oh et al., 2013), C/P, R/P, , . 5 , 10 27 (Kim, 2005). ...
We examined seasonal variation in the structure of marine macroalgal communities at five sites around the Byeonsan Peninsula, Korea, from January to October 2011. Sixty eight species were identified, including 11 green, 17 brown and 40 red algae. Species richness was highest at Gyeokpo (51 species) followed by Sambal (47), Gosapo (34), Byeonsan (33), and Habgoo (18). Seaweed biomass ranged from 12.98 to 145.33 g dry wt/m^2, with maximum and minimum biomasses at Gyeokpo and Habgoo, respectively. Sargassum thunbergii was the representative alga species occupying 47.89% of the total biomass. The dominant seaweeds were S. thunbergii, Corallina pilulifera, Ulva spp, Gracilaria vermiculophylla, and Carpopeltis affinis. No distinctive vertical distribution of seaweeds was found because S. thunbergii, Ulva spp, and G. vermiculophylla were all distributed from high to low shore. Community indices were as follows: dominance index (DI), 0.44-0.61; richness index (R), 6.27-10.35; evenness index (J`), 0.38-0.59; and diversity index (H`), 1.48-1.71. Gyeokpo had the most biomass and highest species richness, and the lowest percentage of Ulva species. However, species richness declined at Gyeokpo, from 78 to 51 species within 10 years, implying that eutrophication and sedimentation from Mankyeong and Dongjin rivers have reduced the stability of seaweed communities.
We grouped the names attributed to the seas surrounding the Korean Peninsula in maps published in two major Korean ocean and fisheries science journals over the period from 1998 to 2017: the Journal of the Korean Society of Oceanography (The Sea) and the Korean Journal of Fisheries and Aquatic Science (KFAS). The names attributed to these seas in maps of journal paper broadly were classified into three groupings: (1) East Sea and Yellow Sea; (2) East Sea, Yellow Sea, and South Sea; or (3) East Sea, West Sea and
South Sea. The name ‘East Sea’ was dominantly used for the waters between Korea and Japan. In contrast, the water between Korea and China has been mostly labelled as ‘Yellow Sea’ but sometimes labelled as ‘West Sea’. The waters between the south coast of Korea and Kyushu, Japan were labelled as either ‘Korea Strait’ or ‘South Sea’. This analysis on sea names in the maps of ‘The Sea’ and ‘KFAS’ reveals that domestic researchers frequently mix geographical and international names when referring to the waters surrounding the Korean Peninsula. These inconsistencies provide the motivation for the development of a basic unifying guideline for naming the seas surrounding the Korean Peninsula. With respect to this, we recommend the use of separate names for the marginal seas between continental landmasses and/or islands versus for the coastal waters surrounding Korea. For the marginal seas, theinternationally recognized names are recommended to be used: East Sea; Yellow Sea; Korea Strait; and East China Sea. While for coastal seas, including Korea’s territorial sea, the following geographical nomenclature is suggested to differentiate them from the marginal sea names: Coastal Sea off the East Coast of Korea (or the East Korea Coastal Zone), Coastal Sea off the South Coast of Korea (or the South Coastal Zone of Korea), and Coastal Sea off the West Coast of Korea (or the West Korea Coastal Zone). Further, for small or specific study areas, the local region names, district names, the sea names and the undersea feature names can be used on the maps.