득량만의 조개류 생산량과 환경요인 관계 분석 = Effects of Environmental Characteristics on the Production of Shellfish in Deukryang Bay, Korea

다국어 초록 (Multilingual Abstract)

This study was carried out to determine marine environments and phytoplankton community in Deukryang Bay during the period of summer in 1987-2010. Water temperature, salinity, pH and dissolved oxygen were shown in much yearly fluctuations. In August, water temperatures in surface and on bottom were the highest, compared with average surface (24.54℃) and bottom (22.90℃) water temperature for 18 years in Deukryang Bay. The main reason is assumed to longer duration of sunshine during the period of August. Although the amount of the rainfall in August was the highest, significant impact of marine environment did not show. Most of dissolved inorganic nitrogen and phosphate in Deukryang were lower concentration during summer and N:P ratio also showed below 18 in Redfield. In particular, extreme increasing of N:P ratio in August was occurred by intensive precipitation. Distribution of phytoplankton community was a consistent occurrence for 18 years. The genus of Chaetoceros, Cosinodisucs and Skeletonema were regarded as the represent diatom, whereas the highest occurrence of genus among dinofagellates was Ceratium. It is thought that the relationship between phytoplankton and nutrient has a strong positive signal, although nutrients persist a little concentration and much fluctuations in marine environments were observed. High availability in phytoplankton is contributed to consistently provide the food organism of shellfish. Consequently, recent decreasing production of shellfish and seed are probably associated with higher temperature during the period of summer. However, higher temperature is also occurred ago and after 2000. On the basis of geography, Deukryang Bay had a small mouth and long channel, which is attributed to decreasing genetic diversity. It is assumed that higher temperature and lower genetic diversity have a extreme impact of larvae and shellfish for reproduction in Deukryang. It is necessary to persistently monitor based on water quality and phytoplankton community.

참고문헌 (Reference)

1 "해양환경공정시험방법" 해양수산부 330-, 2002

2 유성규, "천해양식" 구덕인쇄사 639-, 2000

3 류상옥, "조간대성 해빈 퇴적물의 이동양상에 관한 연구 I. 한국 남해안의 득량만" 한국지구과학회 27 (27): 221-235, 2006

4 최용규, "여름철 득량만의 열속과 관련한 성층" 6 (6): 579-587, 1997

5 최용규, "수심에 따른 득량 만 키조개 어장의 환경 특성" 31 (31): 127-141, 1995

6 한동훈, "득량만이 동물플랑크톤의 분포" 28 (28): 517-532, 1995

7 공영세, "득량만의 퇴적물 및 부유물 특성" 29 (29): 269-277, 1994

8 이병걸, "득량만의 조석주기 및 계 절변동에 따른 투명도의 변동특성" 32 (32): 386-394, 1996

9 마채우, "득량만의 저서동물 분포" 28 (28): 503-516, 1995

10 김철원, "득량만에서 조개류 유생의 분포" 한국양식학회 19 (19): 288-298, 2006

11 윤양호, "득량만 표층퇴적물 중 유기물의 시·공간적 분포 및 기원" 한국환경과학회 12 (12): 2003

12 양한섭, "득량만 표층수중 영양염 류의 시공간적 분포특성 1. 영양염류의 계절변화와 기초생산 제한인자" 28 (28): 475-488, 1995

13 김도희, "득량만 퇴적물로부터 영양염 용출 평가" 7 (7): 425-431, 1998

14 윤양호, "득량만 식물플랑크톤 군집의 시․공간적 분포특성" 17 (17): 481-492, 1999

15 조현서, "득량만 남서해역의 계절 별 수질변동 특성" 216-217, 1999

16 김학균, "나로도 인근해역에서 Cochlodinium polykrikoides 적조의 최초발생과 환경" 57 : 119-129, 1999

17 윤호섭, "고수온기 가막만 피조개 (Scapharaca broughtonii) 양식장 환 경과 대량폐사" 371-372, 2001

18 김정배, "가막만 빈산소 수괴 소멸기의 물리화학적 특성" 해양환경안전학회 16 (16): 241-248, 2010

19 Avise, J. C, "Molecular markers, natural history and evolution" Sinauer Associates 511-, 1994

20 이재철, "1992년 하계 득량만 서부해역의 조류 특성" 28 (28): 1-6, 1995