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RISS 인기검색어
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러시아측 동해 북서부 해역과 한국측 동해 남서부 해역 트롤 조사에 어획된 어류의 종조성 및 양적변동
SOHN, Myoung Ho,YOON, Sang Chul,LEE, Sung Il,YOON, Byung Sun,CHA, Hyung Kee,KIM, Jong Bin,Kalchugin, Pavel,Solomatov, Sergey 한국수산해양기술학회 2015 수산해양기술연구 Vol.51 No.3
To examine species composition, abundance and biomass of fishes in the northwestern East Sea of Russian EEZ, trawl survey were conducted at 31 sampling stations from 2006 to 2008. Also, trawl survey were conducted at 21 sampling stations in the southwestern East Sea of Korean EEZ from 2006 to 2008. A total of 67 fishes were collected in the northwestern East Sea of Russian EEZ, a total of 39 fishes were collected in the southwestern East Sea of Korean EEZ. Among them, a total of 53 fishes were collected in the northwestern East Sea of Russian EEZ only, and a total of 25 fishes were collected in the southwestern East Sea of Korean EEZ only. Mean abundance per area which caught by trawl survey in the northwestern East Sea ranged from a high of $116,478inds./km^2$ in 2008 to a low of $19,737inds./km^2$ in 2006. And mean abundance per area in the southwestern East Sea ranged from a high of $89,129inds./km^2$ in 2006 to a low of $8,234inds./km^2$ in 2008. Mean biomass per area which caught by trawl survey in the northwestern East Sea ranged from a high of $11,333kg/km^2$ in 2008 to a low of $2,439kg/km^2$ in 2006. And mean biomass per area in the southwestern East Sea ranged from a high of $6,273kg/km^2$ in 2006 to a low of $1,062 kg/km^2$ in 2008. Cluster analysis, based on a Bray-Curtis similarity matrix of fourth root transformed data of number of species and individuals per area, showed division into three different groups by depth in the northwestern and southwestern East Sea.
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러시아측 동해 북서부 해역과 한국측 동해 남서부 해역 트롤 조사에 어획된 어류의 종조성 및 양적변동
손명호 ( Myoung Ho Sohn ),윤상철 ( Sang Chul Yoon ),이성일 ( Sung Il Lee ),윤병선 ( Byung Sun Yoon ),차형기 ( Hyung Kee Cha ),김종빈 ( Jong Bin Kim ),( Pavel Kalchugin ),( Sergey Solomatov ) 한국수산해양기술학회 2015 수산해양기술연구 Vol.51 No.3
To examine species composition, abundance and biomass of fishes in the northwestern East Sea of Russian EEZ, trawl survey were conducted at 31 sampling stations from 2006 to 2008. Also, trawl survey were conducted at 21 sampling stations in the southwestern East Sea of Korean EEZ from 2006 to 2008. A total of 67 fishes were collected in the northwestern East Sea of Russian EEZ, a total of 39 fishes were collected in the southwestern East Sea of Korean EEZ. Among them, a total of 53 fishes were collected in the northwestern East Sea of Russian EEZ only, and a total of 25 fishes were collected in the southwestern East Sea of Korean EEZ only. Mean abundance per area which caught by trawl survey in the northwestern East Sea ranged from a high of 116,478 inds./km2 in 2008 to a low of 19,737 inds./km2 in 2006. And mean abundance per area in the southwestern East Sea ranged from a high of 89,129 inds./km2 in 2006 to a low of 8,234 inds./km2 in 2008. Mean biomass per area which caught by trawl survey in the northwestern East Sea ranged from a high of 11,333 kg/km2 in 2008 to a low of 2,439 kg/km2 in 2006. And mean biomass per area in the southwestern East Sea ranged from a high of 6,273 kg/km2 in 2006 to a low of 1,062 kg/km2 in 2008. Cluster analysis, based on a Bray-Curtis similarity matrix of fourth root transformed data of number of species and individuals per area, showed division into three different groups by depth in the northwestern and southwestern East Sea.
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2012년과 2014년 봄철 동해 남서부 해역 유색용존유기물의 분포 및 특성 비교
박현실,박미옥 해양환경안전학회 2018 해양환경안전학회지 Vol.24 No.5
해양환경에서 유색용존유기물은 자외선과 가시광선을 흡수하는 주요한 역할을 하며, 표층에서 광분해 과정을 통해 이산화 탄소로 산화됨으로써 해양환경의 생지화학적 탄소순환에도 중요한 역할을 한다. 최근 봄철 유색용존유기물을 포함한 해수의 혼합층에 서 순수한 해수에 비해 약 40% 이상 열에너지를 흡수한다는 점도 알려지면서, 유색용존유기물이 기여하는 해수 수온상승에 대한 역할 의 중요성이 알려졌다. 본 연구는 봄철 동해 남동부해역의 해수표층에서 빛에너지 흡수의 원인이 되는 유색용존유기물에 의한 흡광도와 흡광 특성을 측정하였다. 봄철 동해 남서부해역에서 2012년과 2014년에 측정된 유색용존유기물의 분포를 비교하고 공급원을 파악하고자 S값을 이용하였다. 그 결과, 두 해의 표층수 중 유색용존유기물의 흡광계수는 평균값이 0.237 m-1(0.009~0.988 m-1)이고, S값은 16 μm-1 로서 연안수의 특성을 보였다. Chl a와 유색용존유기물 사이에 약한 양의 상관관계를 보였으며(r2=0.34), 특히 외양에 비해 연안 쪽 정점 들이 더 강한 상관관계를 보였다. 봄철 혼합층에서 2014년 유색용존유기물의 농도는 0.299 m-1로서 2012년의 0.180 m-1에 비해 약 40% 높게 측정되었다. 두 해의 유색용존유기물이 흡광계수의 차이는 연 변화 이외에도 측정시기의 차이에서 2012년 봄철 진행된 성층화와 일조량 증가에 의한 광분해의 결과로 보인다. 이는 간접적으로 표층 해수 표면을 통한 광산화과정에 의한 대기로의 이산화탄소 유입 가능성을 시사한다. Chromophoric Dissolved Organic Matter (CDOM) plays a dominant role in absorbing UV-VIS light and is also important in the biogeochemical carbon cycle due to the production of carbon dioxide from photo-oxidation at the sea surface in marine environments. Since absorption by CDOM was recently found to be responsible for increasing the energy absorbed in the mixed layer by 40 % over pure seawater, the importance of CDOM absorption in seawater for increasing sea surface temperature has come to be well recognized. We measured aCDOM and the absorption characteristics of CDOM during spring 2012 and 2014 in the southwestern East Sea. Distribution of CDOM in spring 2012 and 2014 was compared and S value was used to find the source of CDOM in the study area. As a result, the average aCDOM was 0.237 m-1 (0.009~0.988 m-1) and the average S value was 16 μm-1,which shows coastal properties. Also a positive correlation between Chl a and CDOM was observed (r2=0.34), with an especially strong correlation near coastal stations. aCDOM in 2014 was about 40 % higher than aCDOM in 2012 during spring in the study area. This difference in aCDOM concentration resulted not only from annual variation but also from stratification and photobleaching in late spring 2012. This observation implies the possibility of flux of carbon dioxide into the atmosphere as a result of photo-oxidation in the East Sea.
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