Pub Date : 2020-01-01DOI: 10.4217/OPR.2020.42.1.089
Jong-Hyun Park, Kisup Lee, In-Ki Kwon, Hoon Chung
{"title":"A Comparative Study of Nest Attendance Patterns of Chick-rearing Black-faced Spoonbills (Platalea minor) in Incheon, South Korea","authors":"Jong-Hyun Park, Kisup Lee, In-Ki Kwon, Hoon Chung","doi":"10.4217/OPR.2020.42.1.089","DOIUrl":"https://doi.org/10.4217/OPR.2020.42.1.089","url":null,"abstract":"","PeriodicalId":35665,"journal":{"name":"Ocean and Polar Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70346747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.4217/OPR.2020.42.1.015
Jae-Hyeong Choi, Hyi-Seung Lee, W. Campos
The marine sponge Hyrtios sp. collected in the Philippines was extracted and partitioned. The resulting organic layer was purified by C18 reversed-phase column chromatography and HPLC to achieve the separation of nine scalarane-type sesterterpenes, including one new compound with eight known scalarane analogs. The chemical structures of the isolated compounds 1−9 were elucidated by 1D and 2D NMR and MS data analysis. All nine compounds were evaluated for their antibacterial activities against three Gram-positive and three Gram-negative bacteria. The compound 3 exhibited potent antibacterial activities against Bacillus subtilis and Micrococcus luteus. The compounds 7 and 9 displayed considerable activities against Bacillus subtilis and the others had moderate results.
{"title":"Scalarane-type Sesterterpenes from the Philippines Sponge Hyrtios sp.","authors":"Jae-Hyeong Choi, Hyi-Seung Lee, W. Campos","doi":"10.4217/OPR.2020.42.1.015","DOIUrl":"https://doi.org/10.4217/OPR.2020.42.1.015","url":null,"abstract":"The marine sponge Hyrtios sp. collected in the Philippines was extracted and partitioned. The resulting organic layer was purified by C18 reversed-phase column chromatography and HPLC to achieve the separation of nine scalarane-type sesterterpenes, including one new compound with eight known scalarane analogs. The chemical structures of the isolated compounds 1−9 were elucidated by 1D and 2D NMR and MS data analysis. All nine compounds were evaluated for their antibacterial activities against three Gram-positive and three Gram-negative bacteria. The compound 3 exhibited potent antibacterial activities against Bacillus subtilis and Micrococcus luteus. The compounds 7 and 9 displayed considerable activities against Bacillus subtilis and the others had moderate results.","PeriodicalId":35665,"journal":{"name":"Ocean and Polar Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70346579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.4217/OPR.2020.42.2.097
S. Kim
{"title":"Characteristics of Water Temperature Inversion Observed in a Region West of Jeju Island in April 2015","authors":"S. Kim","doi":"10.4217/OPR.2020.42.2.097","DOIUrl":"https://doi.org/10.4217/OPR.2020.42.2.097","url":null,"abstract":"","PeriodicalId":35665,"journal":{"name":"Ocean and Polar Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70346761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.4217/OPR.2019.41.3.147
Jong-Hyun Park, Kisup Lee, In-Ki Kwon, Hoon Chung
{"title":"Factors Affecting Incubation Rhythm of the Black-faced Spoonbill (Platalea minor) Breeding in Gyeonggi Bay, Korea","authors":"Jong-Hyun Park, Kisup Lee, In-Ki Kwon, Hoon Chung","doi":"10.4217/OPR.2019.41.3.147","DOIUrl":"https://doi.org/10.4217/OPR.2019.41.3.147","url":null,"abstract":"","PeriodicalId":35665,"journal":{"name":"Ocean and Polar Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70346486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.4217/OPR.2019.41.3.193
Jihoon Kim, Jin-Soon Park, J. Ko
{"title":"Experimental Study on Interaction Effect of Darrieus Tidal Stream Turbines","authors":"Jihoon Kim, Jin-Soon Park, J. Ko","doi":"10.4217/OPR.2019.41.3.193","DOIUrl":"https://doi.org/10.4217/OPR.2019.41.3.193","url":null,"abstract":"","PeriodicalId":35665,"journal":{"name":"Ocean and Polar Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70346497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2019-01-01DOI: 10.4217/OPR.2019.41.2.089
Y. Suh
{"title":"Contrasting Sources of Plant Wax n-alkanes and n-alkanoic Acids in Gulf of Mexico Sediments (ODP 625B)","authors":"Y. Suh","doi":"10.4217/OPR.2019.41.2.089","DOIUrl":"https://doi.org/10.4217/OPR.2019.41.2.089","url":null,"abstract":"","PeriodicalId":35665,"journal":{"name":"Ocean and Polar Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70346937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.4217/OPR.2018.40.2.077
Jingyi Song, Jeonghyun Kim, Taehoon Kim
We observed the concentrations of Dissolved Organic Carbon (DOC) and Colored Dissolved Organic Matter (CDOM) in coastal seawater and groundwater around a volcanic island, Jeju, Korea. The sampling of surface seawater and coastal groundwater was conducted in Woljeongri, Pyoseon, and Kwakgi beaches, in three sampling campaigns (June, July, and October 2016). The concentrations of DOC in groundwater were relatively higher in June and October than in July. Salinity and DOC concentrations in the coastal groundwater of Woljeongri and Pyoseon beaches did not show a marked relationship, whereas those in Kwakgi beach showed a good positive correlation (July: R = 0.64, P < 0.01; October: R = 0.95, P < 0.01). In addition, the concentrations of CDOM (C and M peaks) in the groundwater of Woljeongri and Pyoseon beaches, where saline groundwater discharge dominates, were relatively higher than those of Kwakgi beach, where fresh groundwater discharge dominates. The relatively higher DOC concentrations in the coastal groundwater of Woljeongri and Pyoseon, with higher CDOM concentrations, seem to be mainly from anthropogenic sources such as local pollution sources (i.e., aquaculture wastewater or domestic sewage). In order to understand the behavior of DOC in the coastal groundwater of a volcanic island, extensive studies are necessary in the future over a larger-area and greater time-scales using various isotopic tracers.
研究了韩国济州岛火山岛附近沿海海水和地下水中溶解有机碳(DOC)和彩色溶解有机物质(CDOM)的浓度。2016年6月、7月和10月，在月井里、平宣和果基海滩进行了3次表层海水和沿海地下水采样。6月和10月地下水DOC浓度相对高于7月。月井里、坪宣海滩沿海地下水盐度与DOC浓度无显著相关关系，果基海滩呈良好的正相关关系(7月:R = 0.64, P < 0.01;10月:R = 0.95, P < 0.01)。此外，以咸水排放为主的月井里和平宣海滩地下水中CDOM (C和M峰值)浓度相对高于以淡水排放为主的果基海滩。月井里和坪县沿海地下水中DOC浓度相对较高，CDOM浓度较高，似乎主要来自当地污染源(即水产养殖废水或生活污水)等人为来源。为了了解火山岛沿海地下水中DOC的行为，未来需要在更大的区域和更长的时间尺度上使用各种同位素示踪剂进行广泛的研究。
{"title":"Distributions of Dissolved Organic Matter in Submarine Groundwater Discharge (SGD) in Jeju Island","authors":"Jingyi Song, Jeonghyun Kim, Taehoon Kim","doi":"10.4217/OPR.2018.40.2.077","DOIUrl":"https://doi.org/10.4217/OPR.2018.40.2.077","url":null,"abstract":"We observed the concentrations of Dissolved Organic Carbon (DOC) and Colored Dissolved Organic Matter (CDOM) in coastal seawater and groundwater around a volcanic island, Jeju, Korea. The sampling of surface seawater and coastal groundwater was conducted in Woljeongri, Pyoseon, and Kwakgi beaches, in three sampling campaigns (June, July, and October 2016). The concentrations of DOC in groundwater were relatively higher in June and October than in July. Salinity and DOC concentrations in the coastal groundwater of Woljeongri and Pyoseon beaches did not show a marked relationship, whereas those in Kwakgi beach showed a good positive correlation (July: R = 0.64, P < 0.01; October: R = 0.95, P < 0.01). In addition, the concentrations of CDOM (C and M peaks) in the groundwater of Woljeongri and Pyoseon beaches, where saline groundwater discharge dominates, were relatively higher than those of Kwakgi beach, where fresh groundwater discharge dominates. The relatively higher DOC concentrations in the coastal groundwater of Woljeongri and Pyoseon, with higher CDOM concentrations, seem to be mainly from anthropogenic sources such as local pollution sources (i.e., aquaculture wastewater or domestic sewage). In order to understand the behavior of DOC in the coastal groundwater of a volcanic island, extensive studies are necessary in the future over a larger-area and greater time-scales using various isotopic tracers.","PeriodicalId":35665,"journal":{"name":"Ocean and Polar Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70346788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.4217/OPR.2018.40.3.161
Kang-Rae Kim, Shin-Joo Moon, Jong-Yeon Park, D. Huynh, J. Park, Keun-Sik Kim, S. Han, I. Bang
: We examined the effect of salinity and water temperature on hatching and survival rates of fertilized eggs of hybrid grouper ( Epinephelus fuscoguttatus ♀ × E . lanceolatus ♂ ) at different developmental stages, determining optimal conditions for their long-distance transportation. Deformities and hatching rates of fertilized grouper eggs were observed at salinities of 24, 27, 30, 33, 36, and 39 psu. The optimal salinity was determined to be 36 psu, with a survival rate of 70.0 ± 2.0%. Transportation experiments at 36 psu were conducted at water temperatures of 21, 24, 27, and 30 o C, different developmental stages such as morula, 5-myomere, and tail beating for hatching and survival rates. The optimal water temperature and developmental stage for transporatation were 30 o C and tail beating stage and those hatching rates were 50.6 ± 1.9% and 86.3 ± 1.3%, respectively. At 21 o C, the survival rate by transportation water temperature was highest (73.1 ± 10.6%), but the hatching rate (17.1 ± 3.1%) was lowest. Therefore, the hybrid grouper fertilized eggs ( E. fuscoguttatus ♀ × E . lanceolatus ♂ ) can be most efficiently produced under long-distance transportation conditions during the tail beating stage and at a water temperature of 30 o C.
{"title":"Effects of Salinity, Water Temperature and Development Stage on the Hatching Rate and Survival of Fertilized Eggs in Hybrid Grouper (Epinephelus fuscoguttatus ♀ × E. lanceolatus ♂) for Long-distance Transport","authors":"Kang-Rae Kim, Shin-Joo Moon, Jong-Yeon Park, D. Huynh, J. Park, Keun-Sik Kim, S. Han, I. Bang","doi":"10.4217/OPR.2018.40.3.161","DOIUrl":"https://doi.org/10.4217/OPR.2018.40.3.161","url":null,"abstract":": We examined the effect of salinity and water temperature on hatching and survival rates of fertilized eggs of hybrid grouper ( Epinephelus fuscoguttatus ♀ × E . lanceolatus ♂ ) at different developmental stages, determining optimal conditions for their long-distance transportation. Deformities and hatching rates of fertilized grouper eggs were observed at salinities of 24, 27, 30, 33, 36, and 39 psu. The optimal salinity was determined to be 36 psu, with a survival rate of 70.0 ± 2.0%. Transportation experiments at 36 psu were conducted at water temperatures of 21, 24, 27, and 30 o C, different developmental stages such as morula, 5-myomere, and tail beating for hatching and survival rates. The optimal water temperature and developmental stage for transporatation were 30 o C and tail beating stage and those hatching rates were 50.6 ± 1.9% and 86.3 ± 1.3%, respectively. At 21 o C, the survival rate by transportation water temperature was highest (73.1 ± 10.6%), but the hatching rate (17.1 ± 3.1%) was lowest. Therefore, the hybrid grouper fertilized eggs ( E. fuscoguttatus ♀ × E . lanceolatus ♂ ) can be most efficiently produced under long-distance transportation conditions during the tail beating stage and at a water temperature of 30 o C.","PeriodicalId":35665,"journal":{"name":"Ocean and Polar Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70346843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.4217/OPR.2018.40.2.059
Yun-Hwan Jung, H. Kim, Heung-Sik Park
This study was conducted to understand the distribution and changes of macrobenthos on rocky intertidal areas around Taean thermoelectric power plant, Also, the purpose of this study was to produce a base-line data on the changes in water temperature due to the operation of the power plant and to un...
{"title":"Thermal Discharge Effects on the Species Composition and Community Structure of Macrobenthos in Rocky Intertidal Zone Around the Taean Thermoelectric Power Plant, Korea","authors":"Yun-Hwan Jung, H. Kim, Heung-Sik Park","doi":"10.4217/OPR.2018.40.2.059","DOIUrl":"https://doi.org/10.4217/OPR.2018.40.2.059","url":null,"abstract":"This study was conducted to understand the distribution and changes of macrobenthos on rocky intertidal areas around Taean thermoelectric power plant, Also, the purpose of this study was to produce a base-line data on the changes in water temperature due to the operation of the power plant and to un...","PeriodicalId":35665,"journal":{"name":"Ocean and Polar Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70346735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2018-01-01DOI: 10.4217/OPR.2018.40.3.127
Yoon-Ha Kim, H. Jung, Chung-Il Lee
This study analyzed the influence of climate change on the spawning ground area of the common squid, Todarodes pacificus. To estimate long term changes in the area of the spawning ground of the common squid, water temperature at 50 m deep that can be inferred from sea surface temperature (SST) based on both NOAA/AVHRR (1981.07−2002.12) and MODIS/AQUA (2003.01−2009.12) ocean color data was analyzed. In addition, five climate indices, Arctic Oscillation Index (AO), Siberian High Index (SH), Aleutian Low Pressure Index (ALP), East Asia Winter Monsoon Index (EAWM) and Pacific Decadal Oscillation (PDO) which are the main indicators of climate changes in the northwestern Pacific were used to study the relationship between the magnitude of the estimated spawning ground and climate indices. The area of the estimated spawning ground was highly correlated with the total catch of common squid throughout four decades. The area of the estimated spawning ground was negatively correlated with SH and EAWM. Especially, PDO was negatively correlated with the area of the spawning ground in the northwestern Pacific (r = -0.39) and in the southern part of the East Sea (r = -0.38). There was a positive relationship between the AO and the area of the spawning ground in the northwestern Pacific (r = 0.46) as well as in the southern part of the East Sea (r = 0.32). Temporally, the area of the winter spawning ground in the southern part of the East Sea in the 1980s was smaller than those areas in the 1990s and 2000s, because the area was disconnected with the western coastal spawning ground of Japan in the 1980s, while the area had been made wider and more continuous from the Korea strait to the western coastal water of Honshu in the 1990s and 2000s.
{"title":"Changes in the Spawning Ground Environment of the Common Squid, Todarodes pacificus due to Climate Change","authors":"Yoon-Ha Kim, H. Jung, Chung-Il Lee","doi":"10.4217/OPR.2018.40.3.127","DOIUrl":"https://doi.org/10.4217/OPR.2018.40.3.127","url":null,"abstract":"This study analyzed the influence of climate change on the spawning ground area of the common squid, Todarodes pacificus. To estimate long term changes in the area of the spawning ground of the common squid, water temperature at 50 m deep that can be inferred from sea surface temperature (SST) based on both NOAA/AVHRR (1981.07−2002.12) and MODIS/AQUA (2003.01−2009.12) ocean color data was analyzed. In addition, five climate indices, Arctic Oscillation Index (AO), Siberian High Index (SH), Aleutian Low Pressure Index (ALP), East Asia Winter Monsoon Index (EAWM) and Pacific Decadal Oscillation (PDO) which are the main indicators of climate changes in the northwestern Pacific were used to study the relationship between the magnitude of the estimated spawning ground and climate indices. The area of the estimated spawning ground was highly correlated with the total catch of common squid throughout four decades. The area of the estimated spawning ground was negatively correlated with SH and EAWM. Especially, PDO was negatively correlated with the area of the spawning ground in the northwestern Pacific (r = -0.39) and in the southern part of the East Sea (r = -0.38). There was a positive relationship between the AO and the area of the spawning ground in the northwestern Pacific (r = 0.46) as well as in the southern part of the East Sea (r = 0.32). Temporally, the area of the winter spawning ground in the southern part of the East Sea in the 1980s was smaller than those areas in the 1990s and 2000s, because the area was disconnected with the western coastal spawning ground of Japan in the 1980s, while the area had been made wider and more continuous from the Korea strait to the western coastal water of Honshu in the 1990s and 2000s.","PeriodicalId":35665,"journal":{"name":"Ocean and Polar Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70346830","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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