• Title/Summary/Keyword: Korean Coasts

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Korean Species of Sargassum subgenus Bactrophycus J. Agradh(Sargassaceae, Fucales)with Key and Distribution

  • Lee, In-Kyu;Yoo, Soon-Ae
    • The Journal of Natural Sciences
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    • v.4
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    • pp.11-22
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    • 1991
  • Early studies on Korean Sargassum subjenus Bactrophycus were partly started by Kyetzubg(1843,1849), J. Agardh(1889), Cotton(1906), Yendo(1907) and Okamura(1913, 1914, 1915, 1917). Kang(1966) reported 15 species and 4 subspecies of Sargassum subgenus Bactrophycus and their wide distribution on the Korean coasts in his paper [On the geographical distribution of marine algae in Korea], a foundation stone of Korean phycology. In fact, all the Korean coasts and subtidal zone are inhabited by Sargassum plants. They constitute the most part of the primary production and dominant species of benthic algal vegetation. In 1974, L.K. Lee began to study Sargassum monographically as seaweed resources in Korea. The Koreans eat some species of Sargassum (including Hizikia fusiformis) or use them as fertilizer of the farm near the coast. Among the reported 17 species of Korean Fucales, 12 species belong to Bactrophycus. Yoo(1976) dealt with the descriptions, figures, and a key of 24 species of Korean Fucales plants in her M.S. thesis paper. Among them 16 species belonged to Bactrophycus. Even though the above two works were done with thorough observation of the dry specimens kept in the Pusan Fisheries University Herbarium (most of them were identified by Kang, J.W.) and nation-wide collections, great morphological varieties of these taxa made Lee and Yoo hesitate to publish the paper. Instead, the serial chemotaxonomic studies on the geographical variations of Korean Fucales plants(Yoo and Lee, 1988a, 1988b ; Yoo, et al., 1988) were held to solve the problem, while foreign papers (especially both Drs Tseng's and Yoshida's serial works on Bactrophycus). and authenthic specimens that foreign scholors sent to Korean phycologists induced them to find that several species of Sargassum had been misidentified from the beginning. We introduce here Korean Sargassum subgenus Bactrophycus according to Tseng et al. (1985), mentioning briefly the characteristics of the species, key, and distribution on the Korean coasts.

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A Study of the Trace Elements in Sea-weed (Dried Laver) (한국산 김중의 미량금속 함량 조사연구)

  • 윤혜경;노영수
    • Environmental Analysis Health and Toxicology
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    • v.12 no.3_4
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    • pp.67-73
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    • 1997
  • This study was carried out to investigate the contents of heavy metals such as iron, copper, lead, cadmium, magnesium, platium in connection with water pollution in sea weed (dried laver) collected from the west, south, south- west, and east coasts of Korea. The results of the study are as follows; Iron was shown the highest value (1.280ppm) in the wild laver from the south coast. Copper was detected in larger qauntities (0.169 ppm) in green laver than in any other kinds of laver observed in this study. Lead was detected in larger quantities (0.195ppm) in the usual laver and green laver from the south-west coast as compared with the other coasts. Although cadmium and platium was also detected from every kind of laver, the concentrations were not over the allowance of the residual.

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A Study of the Behaviors of Nourishing Sand on the Artificial Nourishment Beach (인공양빈해안의 해빈특성에 관한 연구)

  • 민병형;김가현;김진생
    • Journal of Ocean Engineering and Technology
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    • v.1 no.2
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    • pp.60-66
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    • 1987
  • The object of this study is to investigate behaviors of beach fill replenished at three coasts of different configurations by analyzing successively measured beach profiles. The main results obtained in this study are summarized as follows; 1) The amount of nourishing sand moved in the longshore direction surpasses the amount of nourishing sand transported in the cross-shore direction regardless of shapes of the coasts and types of the structures. 2) A clear correlation between displacements of shoreline and changes of sectional areas can be found soon after the placement of beach fill in the fields. This implies that the deformation of the artificial nourishment and dissipation or remaining rate of nourishing sand can be predicated by the one-line theory. 3) The patterns of sediment movements in the artificially nourished beaches are clearly found by the analysis of empirical eignfuncitions.

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Dynoides spinipodus , a New Species of Sphaeromatid Isopod(Crustacea) from the South Coasts of Korea (한국 남해안에서 채집된 잔벌레과 등각류(wfjwlehdanfrks 갑각상강)의 1 신종 Cynoides spinipodus)

  • 권도헌;김훈수
    • Animal Systematics, Evolution and Diversity
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    • v.2 no.1
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    • pp.43-48
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    • 1986
  • Collections of isopod custaceans from the south coasts of Korea contained a new species of sphaeromatid genus Dynoides . Description is given under the name of Dynoides spinipodus. The proposed new species is allied to D. serratisinus BArnard, 1914, D. barnardi Baker, 1928 and D.Dentisinus Shen , 1929 in the presence of a conical median process on the pleon , but it is readily distinguished by the pleotelsonic foramen without maginal teeth along its inner border.

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A Study on the Measures for Safety Management at the Coastal Sea Area in Korea (국내 연안해역 안전관리 방안에 관한 연구)

  • Chang, In-Shik
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.15 no.4
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    • pp.393-399
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    • 2009
  • Most of marine casualties occur at the coastal sea areas where maritime traffics are heavy and on the coastal regions such as the beaches and breakwaters, etc. where a lot of people visit. Recently, tile risk of casualties along the coasts has been on the increase due to the revitalization of marine leisure activities in Korea. However, the measures to prevent accidents along the coasts have not kept step with increasing rate of the accidents and the safety management system has not been organized. Recent marine casualties were analyzed to propose alternative measures for safety management to minimize marine casualties along the coasts. Comprehensive safety system and networks are necessary to be established and the integration and unification of the relevant authorities in charge should be accomplished in Korea. In rapid response to marine casualties, the search and rescue system should be established for the systematic and effective life-saving operations in Korean coastal areas.

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Systematic Studies of Korean Rodents. V. Morphometric and Chromosomal Analyses on Island Populations of Striped Field Mice (Apodemus agrarius coreae) in Southwestern coasts of the Korean Peninsula (한국산 설치류의 계통분류학적 연구 5.한반도 남서해안의 섬들에 살고 있는 등줄쥐들의 형태적 형질 및 염색체의 분석)

  • Koh, Hung Sun
    • Animal Systematics, Evolution and Diversity
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    • v.5 no.1
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    • pp.1-12
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    • 1989
  • Samples of striped field mice, Apodemus agrarius Pallas, from eight localities in s southwestern islands and coasts in Korea were collected and analyzed together with samples from the mainland and Jeju island. In chromosomal analyses no variation was revealed in karyotypes among samples from Korea. In morphometric analyses samples from Wan and Bogil islands formed a large-size g group (A. agrarius chejuensis) with those from Jeju island, whereas samples from Jin and H Hajo islands formed a small-size group (A. agrarius coreae) with those from the mainland including southwestern coasts It is supposed that small-size population of striped field mice in Wan and Bogil islands w were extinct and replaced by large-szie population of striped field mice immigrated from Jeju island by humans.

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Inter-annual Variation of Tides on the Western Coasts of Korea (서해 연안에서 조석특성의 경년변화)

  • Jung, Tae Sung
    • Journal of Korean Society of Coastal and Ocean Engineers
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    • v.28 no.2
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    • pp.81-91
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    • 2016
  • Harmonic analysis of tide data observed on the western coasts has been conducted. The changing trends of harmonic constants were reviewed. Overall, amplitudes of semidiurnal tide are not changed and present phases are faster than in the past. In Mokpo located in a semi-enclosed bay, the amplitudes have been greatly increased and the phases have become earlier due to construction of sea-dike and seawalls. Harmonic constants of diurnal tide have not been changed except Mokpo. In Mokpo the phases of diurnal tide have been earlier. Tidal ranges in spring tide and neap tide have not been significantly changed except Mokpo. In Mokpo tidal ranges have been increased and tidal flats widened. Approximate higher high water has been overall rising. Therefore, Korean western coasts can be easily inundated than before.