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디지털 음향측심기를 이용한 광양만 잘피(Zostera marina L.)의 피도와 생물량 추정
김근용,김주형,김광용,Kim, Keun-Yong,Kim, Ju-Hyoung,Kim, Kwang-Young 한국조류학회(藻類) 2008 ALGAE Vol.23 No.1
Eelgrass beds are very productive and provide nursery functions for a variety of fish and shellfish species. Management for the conservation of eelgrass beds along the Korean coasts is critical, and requires comprehensive strategies such as vegetation mapping. We suggest a mapping method to spatial distribution and quantify of eelgrass beds using a digital echosounder. Echosounding data were collected from the northeast part of Kwangyang Bay, on the south of Korea, in March, 2007. A transducer was attached to a boat equipped with a DGPS. The boat completed a transect survey scanning whole eelgrass beds of 11.7 km2 with a speed of 1.5-2 m s-1 (3-4 knot). The acoustic reflectivity of eelgrass allowed for detection and explicit measurements of canopy cover and height. The results showed that eelgrass bed was distributed in depth from 1.19 to 3.6 m (below MSL) and total dry weight biomass of 4.1 ton with a vegetation area of 4.05 km2. This technique was found to be an effective way to undertake the patch size and biomass of eelgrass over large areas as nondestructive sampling.
김근용,김영수,황철희,이창규,임월애,김창훈,Kim, Keun-Yong,Kim, Young-Soo,Hwang, Choul-Hee,Lee, Chang-Kyu,Lim, Wol-Ae,Kim, Chang-Hoon The Korean Society of Phycology 2006 ALGAE Vol.21 No.3
This study carried out phylogenetic analysis of dinoflagellate Gonyaulax polygramma which was responsible for a harmful algal bloom episode in Korea in 2004. Molecular phylogenetic tree inferred from the partial LSU rDNA data showed that G. polygramma came up among the monophyletic Gonyaulax clade, but did not have apparent genetic affiliation to other Gonyaulax species. This result appears to be consistent with characteristic morphological features of G. polygramma such as epitheca sharply tapering to the apex and thecal plates ornamented with numerous longitudinal striations.
김근용(Kim, Keun Yong),김용순(Kim, Yong Soon),박천규(Park, Cheon Kyu) 한국공간환경학회 2004 공간과 사회 Vol.22 No.-
국민임대주택은 시중임대료보다 낮은 임대료로 공급되어 저소득층에게 주거안정과 경제적 편익을 제공하고 있다. 그러나 국민임대주택 공급으로 인한 입주자의 경제적 편익에 관한 전국적 단위의 연구가 없어 정책의 구체적인 실효성을 판 단하기는 어려운 실정이다. 이 연구는 분석대상을 전국단위로 하여 국민임대주택입주자의 경제적 편익 등을 추정하여 정책의 효과성을 평가하고자 한다. 분석결과, 국민임대주택 입주자들은 호당 매월 18만 3,800원(호당 연평균 220만 5,600 원)의 편익을 얻고 있다. 국민임대주택 계획물량 112만 호가 모두 건설될 경우 입주자들의 총 주거편익은 매년 2조 4,703억 원에 이르는 것으로 추정된다. 그러나 작은 평형의 정책적 지원액 대비 입주자 편익이 상대적으로 큰 평형보다 낮게 나타나고 지역별로도 상당한 편차가 나타나 계층간‧지역간 형평성에서는 다소 문제가 있는 것으로 판단된다. 따라서 형평성 제고를 위해서 지역간‧계층간 임대보증금 및 임대료 조정이 필요하다. The National Rental Housing Program was launched in 1998 to provide housing stability for the low-income class. There exists a need to measure how much monetary benefit is provided to National Rental tenants to develop more desirable housing policy. In this study, estimating tenants’ benefits, it uses the market price approach which is to deduct subsidized public housing rent from the market rent. The findings show that there are considerable disparities of public rental tenants’ benefits in classes and regions.
맹준호,김근용,김영윤,손명백,김진희,손민호,Maeng, Jun-Ho,Kim, Keun-Yong,Kim, Young Ryun,Shon, Myung Baek,Kim, Jin Hee,Son, Min Ho The Korean Society for Marine Environment and Ener 2015 한국해양환경·에너지학회지 Vol.18 No.3
본 연구는 고리원자력발전소와 신고리원자력발전소로부터 배출되는 온배수의 영향을 받는 해역에서 퇴적물 특성과 대형 저서동물의 군집구조를 조사하고 비교하였다. 두 배출해역의 퇴적물 특성들 중에서 모래와 펄, 유기물의 함량이 통계적으로 유의한 차이를 보였다. 대형 저서동물의 출현종과 개체 수는 고리원자력발전소보다 신고리원자력발전소의 배출해역에서 더 많았으며, 그 수는 이전의 다른 연구결과들과 유사한 수준이었다. 두 원자력발전소의 온배수 배출해역은 퇴적물 특성과 대형 저서동물의 출현종 수에서 유의한 차이를 보였다. This study investigated and compared sediment properties and macrobenthic community structures within heated effluent plumes at the discharge areas of Kori Nuclear Power Plant (KNPP) and Sinkori Nuclear Power Plant (SNPP) in Korea, which have different thermal effluent discharge systems. There were significant differences in sand, clay and organic carbon contents between sediments at the two discharge areas. Species richness and abundance of macrobenthos were higher at the SNPP discharge area than at that of the KNPP, although the values at both areas were comparable to previous studies in coastal areas of eastern Korea.
내수면 양식 어류에서 분리된 Edwardsiella 속 균주들의 유전학적 동정 및 생화학적 특성
장문희 ( Mun Hee Jang ),김근용 ( Keun-yong Kim ),이유희 ( Yu Hee Lee ),오윤경 ( Yun Kyung Oh ),이정호 ( Jeong-ho Lee ),송준영 ( Jun-young Song ) 한국어병학회 2020 한국어병학회지 Vol.33 No.2
The genus Edwardsiella belonging to the family Enterobacteriaceae is a member of Gram-negative rod-shaped bacteria that cause disease in diverse aquatic organisms such as fish, amphibians and reptiles as well as avians and mammals including human throughout the world. This genus had been composed of three species, E. hoshinae, E. ictaluri and E. tarda, but recent researches erected two novel species, E. anguillarum and E. piscicida that were conventionally identified as E. tarda. In this study, we isolated seven strains belonging to the genus Edwardsiella from freshwater fishes that had been reared at inland fish farms in South Korea and investigated their biochemical characteristics and molecular phylogenetic relationships. The seven strains showed typical characteristics of four Edwardsiella species, E. anguillarum, E. ictaluri, E. piscicida and E. tarda, by biochemical analyses of Gram staining, indole and hydrogen sulfide (H<sub>2</sub>S) production, and API (Analytic Profile Index) 20E test. Molecular phylogenetic analyses inferred from DNA sequence data of both 16S ribosomal RNA (rRNA) and DNA gyrase subunit B (gyrB) genes were congruent with the biochemical characteristics. As a result, both biochemical and molecular phylogenetic analyses identified four strains isolated from three Anguilla species as E. anguillarum, E. piscicida and E. tarda, two strains from Pelteobagrus fulvidraco and Silurus asotus as E. ictaluri, and one strain from Moroco oxycephalus as E. piscicida. In this study, we isolated and successfully identified recently newly erected species, E. anguillarum and E. piscicida in addition to historically notorious pathogenic species, E. ictaluri and E. tarda. In the future study, systematic and comprehensive monitoring of the four Edwardsiella species are required for studying differences in pathogenicity among freshwater fishes.