• 수산해양교육연구
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• 제20권1호
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• pp.58-67
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• 2008

Seasonal variations in carbon dioxide in the air and soil organic carbon in the sediments were monitored at the constructed wetland formed by reclamation work at Goheung Bay. Sediment sampling in the constructed wetland and carbon dioxide measurement in the air were conducted on June 16 and August 23, 2007. Sediments in the constructed wetland were sampled at 11 different points (June 16) and 14 points (August 23), while carbon dioxide in the air was measured at 13 points (June 16) and 15 points (August 23). Water content and organic carbon in the sampled sediments were analyzed in the laboratory. Water content of the sediments was higher than that of general soil, and the variation between June and August was not evident. The amounts of organic carbons in the sediments sampled on August 23 were higher than those sampled on June 16. Also, there was more organic carbon in the sediments sampled at the field of reeds than in the pure wetland area. Daily maximum variation in carbon dioxide in the air was higher on June 16, but the amount of carbon dioxide in the air was greater on August 23. The results of the study suggest that organic carbon in the sediments and carbon dioxide in the air were greater in summer (August 23) than in spring season (June 16) in the constructed wetland at Goheung Bay.

• Fisheries and Aquatic Sciences
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• 제6권3호
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• pp.140-148
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• 2003

On the basis of factor analysis, stations were grouped according to their similar characteristics of seawater quality. The data for factor analysis were collected from the 15 stations from Dukryang Bay to Ulsan Bay on the southern cost of Korea. The study was based on the data from 1991 to 2000. The 8 water quality items analyzed were temperature, salinity, pH, DO, COD, DIN (dissolved inorganic nitrogen), DIP (dissolved inorganic phosphorus), and SS (suspended solid). Analysis of 6 water quality items including DO with the exception of temperature and salinity showed that 15 stations were grouped into two zones, i.e., the western and the eastern coast, by the axis of Samcheonpo-Jinju Bay-south of Geoje, 3 seawater zones in all. The adjacent stations to the southward or northward but not those to the eastward or westward were classified into the same group. On the analysis of all of the 8 water quality items, the stations of Dukryang Bay and Goheung; and those of Onsan and Ulsan Bay were classified into the same group. Yeosu and Namhae stations were sectioned into 1 group on the all seawater quality items but DIP, Samcheonpo and south of Geoje stations another group on all seawater quality items but water temperature, and Masan and Busan stations in the other group on all seawater quality items but DO. The stations from Dukryang Bay through Goheung to east of Geoje were grouped together on the COD item, and this showed somewhat different tendency in other seawater quality items.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.876-878
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• 2003

It was studied on the choice of potential area for red tide occurrence from oceanographic factors. Oceanographic factors of favorable marine environmental conditions for the red tide formation included warm water temperature, low salinity, high suspended solid, low phosphorus, low nitrogen. It was founded the potential areas for red tide occurrence in August 2000 by GIS conception: Yeosu~Dolsan coast, Gamak bay, Namhae coast, Marado coast, Goheung coast, Deukryang bay, respectively.

• 한국습지학회지
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• 제10권1호
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• pp.21-30
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• 2008

증발산은 지표와 대기 사이에서 일어나는 에너지 상호작용에 기여하는 중요한 요소 중 하나이다. 갈대로 덮인 고흥만 간척지에서 현열, 토양열 그리고 순복사를 측정하여 증발산량을 조사하였다. 자동기상관측 자료로부터 산출된 증발산량은 구름과 바람의 연직경도가 $1s^{-1}$보다 미약한 경우를 제외하고 열수지 방정식으로 추정한 값과 잘 일치하였다. 토양열은 순복사의 약 10%로 평가되었다. 갈대로 구성된 식생캐노피 내에서 온도에 따른 포화수증기압의 변화율($${\Delta}{\sim_=}de_s/dT$$)이 약 1.5로 근사되었고, 증발산량은 순복사 에너지의 함수로 설명될 수 있다.

• 수산해양교육연구
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• 제20권2호
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• pp.156-167
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• 2008

Meorological data have been collected to monitor the wetland area in Goheung bay since 2003 and four intensive observations were conducted to study effects of the atmospheric turbulence on the energy budget and the ecological changes. We improved an algorithm to estimate the sensible heat flux with routine data. The sensible heat flux estimated by gradient method was in good agreement with that measured by precision instruments such as surface layer scintillometer and ultrasonic anemometer. Diurnal variations of sensible heat flux showed analogous tendency to those of temperature gradient. When the vertical wind shear of horizontal wind components was weak, even though temperature gradient was strong, the gradient method underestimated the sensible heat flux. A compensation for the cloud will make this gradient method be a helpful tool to monitor the ecosystem without expensive instruments except for weak wind shear and temperature gradient.

• 한국수산과학회지
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• 제42권5호
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• pp.509-517
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• 2009

Seagrass meadows are important biogenic habitats for a wide variety of marine animals and plants, a source of organic carbon for commercially important animals, and act as a nutrient filter in estuarine and coastal ecosystems. As such, mapping the distribution of seagrass beds provides us with an important component of management and conservation strategies. To survey seagrass distribution within Deukryang Bay, we directly observed seagrass beds using SCUBA in Boseong-gun, Goheung-gun, and Jangheung-gun. Seagrass distribution in Geogeum and Gumdang islands were not observed. Specifically, we monitored the distribution area, species composition, morphology, density, and biomass of seagrass meadows. Seagarss beds were mapped for Daikum-ri coast, Deukryang island, Yongjeong-ri coast, Samsan-ri coast and Ongam-ri coast. Total seagrass coverage in Deukryang Bay was $5.1\;km^2$, $4.8\;km^2$ of which was Zostera marina, $0.3\;km^2$ Z. caulescence and $0.01\;km^2$ Z. japonica. Z. japonica was found in intertidal zones, Z. marina was found from the intertidal to subtidal zones of 2 m MSL (mean sea level) depth, and Z. caulescence was found in subtidal zones of 2.5-5 m MSL.

• 한국환경과학회지
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• 제16권8호
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• pp.941-957
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• 2007

이 연구는 남해안 중부해역의 여름철 전 후 단계를 나누어서 6월부터 10월까지의 2004-2006년 장기간 해양환경 모니터링 및 식물플랑크톤 군집구조를 파악함과 아울러, Cochlodinium 적조발생에 관한 해석에 이용되고자 하는 것이다. 조사해역은 득량만, 고흥연안, 여자만, 가막만, 광양만, 여수연안, 남해연안으로 총 16개 정점이다. 수온은 $19-29^{\circ}C$ 범위로 여름철 여자만에서 두 정점 모두 가장 높은 $29^{\circ}C,\;27^{\circ}C$를 나타내었다. 그러나 8월을 제외한 6월, 7월, 9월, 10월에는 조사정점에 관계없이 큰 차이를 보여주지 않았다. 염분도는 7월과 8월에 여자만과 광양만에서 다른 조사해역에 비하여 약 5-6 정도 낮은 25-27를 나타내었다. 클로로필의 경우도 7월과 8월에 각 조사해역별 큰 차이를 보이고 있다. 특히 광양만은 최고 5배 정도 많은 $15{\mu}gl^{-1}$까지 보였다. 투명도는 수온, 염분도, 클로로필과 다르게 조사기간 동안 해역에 관계없이 거의 비슷한 수준인 2-5m 정도로 보여주고 있다. 용존무기질소도 조사해역 중 광양만의 경우 7월과 8월에 가장 높은 $0.53mgl^{-1}$까지 보여 10배 정도까지 차이를 보였으나, 용존무기인 상대적으로 큰 차이를 나타내지 못하고 있다. 용존무기질소와 클로로필의 관계를 보면 7월에는 임의 상관성을 보여 클로로필의 증가에 따른 용존무기질소가 급속히 소모됨을 알 수 있지만, 8월에는 거의 오히려 양의 상관성을 보여주고 있다. 식물플랑크톤의 평균 세포수는 7월과 8월에 500 cells $ml^{-1}$까지 나타내었고, 대부분 규조류의 비율이 60% 이상 출현되었으나, 8월에 와편모조류의 점유율이 20-30%까지 보였다. 우점종으로는 Skeletonema costatum이 2004년부터 2006년까지 전 해역에 걸쳐 가장 많이 출현되었다. 각 해역별에 출현하는 식물 플라크톤의 집괴분석에 따르면 상호 혼잡되어 분포 되는 것으로 나타났다. 이상의 결과를 보면 여름철에 가장 큰 해양환경 변화를 보였고, 식물플랑크톤 중 S. costatum은 남해연안의 대표적인 기초생산 종으로 간주된다. 특히 여름철 Cochlodinium 적조는 득량, 가막, 고흥, 여수, 남해해역에서 3년 동안 계속해서 발생된 반면, 여자만과 광양만은 전혀 나타나지 않았다. 뚜렷한 차이점은 용존무기질소 Cochlodinium 적조 형성을 위한 요구량은 수중에 풍부하게 존재하고 있기보다는, 미량이라도 충분히 적조를 유발시키고, 외해역에서도 발생될 수 있다는 뒷받침을 하고 있다.

• 대한원격탐사학회지
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• 제19권1호
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• pp.21-30
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• 2003

It was studied the relationship between the red tide occurrence and the meteorological and oceanographic factors, the choice of potential area for red tide occurrence, and the satellite monitoring for red tide. From 1990 through 2001, the red tide continuously appeared and the number of red tide occurrence increased every year. Then, the red tide bloomed during the periods of July and August. An important meteorological factor governing the mechanisms of the increasing in number of red tide occurrence was heavy precipitation. Oceanographic factors of favorable marine environmental conditions for the red tide formation included warm water temperature, low salinity, high suspended solid, low phosphorus, low nitrogen. A common condition for the red tide occurrence was heavy precipitation 2∼4 days earlier, and the favorable conditions for the red tide formation were high air temperature, proper sunshine and light winds for the day in red tide occurrence. From satellite images, it was possible to monitor the spatial distributions and concentrations of red tide. It was founded the potential areas for red tide occurrence in August 2000 by CIS conception: Yeosu∼Dolsan coast, Gamak bay, Namhae coast, Marado coast, Goheung coast, Deukryang bay, respectively.

• 환경생물
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• 제29권1호
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• pp.31-45
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• 2011

To understand the marine algal flora on Goheung coast, Korea, marine algae at 8 points were collected from November 2008 to February 2009 and from April to June 2009. Thirty-seven species (2 species of angiosperms, 5 chlorophytes, 12 phaeophytes, and 18 rhodophytes) occurred from fall to winter and 52 species (2 species of angiosperms, 9 chlorophytes, 18 phaeophytes, and 23 rhodophytes) occurred from spring to summer. Commonly occurring species were Ulva pertusa, Sargassum thunbergii, Hizikia fuziformis, and Gelidium amansii, and dominant species at most points were Ulva pertusa, Sargassum thunbergii, and Gelidium amansii. The average of the ratio of total rhodophytes and chlorophytes to phaeophytes ((R+C)/P) was 1.61 in fall to winter and 1.69 in spring to summer, and the average Laminariales/Fucales/Dictyotales (LFD) ratio was 1.14 in fall to winter and 1.18 in spring to summer. These results show that the marine algal flora of Goheung could be considered as temperate. The LFD ratio was fit for showing a feature of algal flora of Goheung. Species diversity index was high at Points 4~6 while low at Points 1 and 8. Detrended correspondence analysis (DCA) showed that the similarity of occurring species at Points 3 and 4 was higher than the other points from fall to winter, whereas the occurred species at Points 1~4 were similar from spring to summer. The average values of ecological evaluation index (EEI) of the investigation points were 6.8 from fall to winter and 6.3 from spring to summer, which means that the ecological environment of the investigation points were middle class and the EEI values of outer sea points were higher than the inner bay points.

• 한국양식학회지
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• 제19권4호
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• pp.288-298
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• 2006

득량만의 조개류 유생의 분포를 연구하기 위하여 1995년 5월부터 11월까지 만 전체에 29개의 정점에서 유생을 채집 조사하였다. 조개류 유생의 출현량(개체/$m^3$)은 5월(3,736 개체/$m^3$)부터 증가하여 8월(174,616 개체/$m^3$)에 최고에 이른 후 11월 (2,171 개체/$m^3$)까지 계속 감소하였다. 5월부터 11월까지 출현한 $1\;m^3$ 당 평균 총 유생 가운데 D상은 76%, 각정기 유생은 18%, 성숙 각정기 유생은 6%를 차지하였다. 5월부터 11월까지 득량만에서 동정된 9종의 조개류 유생 중 새고막은 14,030 개체/$m^3$로 전체 동정된 유생의 33.5%를 차지하였으며, 피조개(16.2%), 참굴(12.5%), 종밋(11.0%), 진주담치(10.2%)의 순이었다. 득량만 조개류의 유생 분포의 결과로 추정해 볼 때 진주담치와 종밋을 제외한 대부분 조개류의 주 산란시기는 7월 일 것으로 판단된다. 득량만 조개류 유생의 공간적인 분포는 종에 따라 차이를 보이나, 전체적으로 보면 만 입구에서는 출현량이 적고, 수심이 얕고 수온이 높은 만 안쪽과 서쪽 해역에서는 출현량이 많았다.