남서해역의 유해성 적조생물 Cochlodinium polykrikoides Margalef 모니터링을 위한 환경특성과 식물플랑크톤 군집 동태 = The characteristics of marine environment and phytoplankton community around southwestern waters for ichthyotoxic dinoflagellate Cochlodinium polykrikoides monitoring programme

다국어 초록 (Multilingual Abstract)

This study was to determine the fluctuation in phytoplankton assemblages with regarding to environmental conditions and nutrients, which were surveyed around Mokpo waters in the southwestern waters, Korea. Sampling was carried out on the Mokpo, Sinan, and Wando coasts from March to November 2003. The maximum sea surface temperature was recorded in August, and it ranged around 25℃ regardless of sampling sites. However, salinity in Mokpo waters showed a great variation, which ranged from 5-30 psu and recoded the minimum of 5 psu in July and the maximum of 30 psu in November. Moreover, in Mokpo waters, the chlorophyll a and SS concentration of the surface layer were also the highest values of 20 μg 1^(-1) and 40 μg 1^(-1), respectively than those of Sinan and Wando waters. The concentrations of NH₄-N, NO₂-N, NO₃-N, and PO₄-P were also he highest values of 0.018 μmol 1^(-1), 0.062 μmol (-1), 1.2 μmol (-1), and 0.078 μmol 1^(-1), respectively in Morpo waters than those of Sinan and Wando waters. During the period of this study, the majority of the taxa were diatoms; Thalassiosira rotula, Rhizosolenia setigera, Prorocentrum minimum, Chaetoceros curvisetus, Leptocylindrus danicus, Pseudonitzschia pungens, and Chaetoceros spp. were detected in the dominant species of phytoplankton. The dinoflagellates were relatively abundant during the summer season in Wando waters, which attained an abundance of 10-20%. In Mokpo waters, DIN/DIP was the highest value of 700 in March, whereas the lowest was shown in Wando waters. However, DIN/DIP value in summer at Wando waters was extremely reversed, which appeared to be associated with the development of dinoflagellates. On the bais of factor analysis using SYSAT 6.0, nutrient showed somewhat correlation with chlorophyll a. Consequently, the process of discharge of fresh water in Mokpo waters plays an important role in extremely fluctuation in nutrients and conditions. Although Wando waters maintains a lack of nutrients, it should be influenced by different water current and may be associated with a concentration of nutrients.

참고문헌 (Reference)

1 "해양환경공정시험방법" 해양수산부 330-, 2002

2 "한국 남해안의 Cochlodinium polykrikoides 적조 발생과정에 관한 연구" 119-, 2004

3 "한국 남해 나로도와 소리도 사이 해역의 1998년 하계 해황 및 적조 소멸과의 관계" 6 : 49-62, 2001

4 "한국 남서해역의 식물플랑크톤 군집 출현 및 분포 특성" 12 : 1-17, 2003

5 "전남 고흥 해역의 유해성 적조의 발생연구: 2. 1997년도 식물플랑크톤의 시공간적 변화," 5 : 27-36, 2000

6 "전남 고흥 해역의 유해성 적조의 발생연구: 1. 물리,화학적인 특성," 5, : 16-26, 2000

7 "저수온기 목포연안해역의 해양환경학적 특성 1 수질환경과 기초생산에 영향을 미치는 환경요인 해석" 17 : 1-13, 2001

8 "완도 신지연안해역 식물플랑크톤 군집구조 특성" 12 : 651-664, 1998

9 "목포 주변 해역 조하대 저서동물 군집의 시,공간적 분포," 5 : 169-176, 2000

10 "남해안 연안에서 적조생물 Cochlodinium polykrikoides, Gyrodinium impudicum, Gymnodinium catenatum의 출현상황 및 온도, 염분, 조도 및 영양염류에 따른 성장 특성" 34, : 536-544, 2001

11 "나로도 인근해역에서 C polyykrikoides 적조의 최초발생과 환경특성" 57 : 119-129, 1999

12 "Water masses and circulations around Korean peninsula" ocea (ocea): 324-331, 1992

13 "Studies on chemical and biological processes in the Keum river estuary The cycle of dissolved inorganic nitrogen" ocea (ocea): 1987191-206

14 "Studies on chemical and biological processes in the Keum river estuary" ocea (ocea): 207-215, 1987

15 "Species composition and abundance of phytoplankton and marine bacteria during a Cochlodinium bloom in Tongyong" 57 : 145-151, 1999

16 "Nutrients and Phytoplankton Blooms in the Southern Coastal Waters of Korea The Elemental Composition of C and P in Particulate Matter in the Coastal Bay Systems" 34 : 86-94, 1999

17 "First record of blooms of Cochlodinium sp causing mortality to aquacultured salmon on the west coast of Canada" 40 : 298-304, 2001

18 "Dinoflagellates, In: Identifying marine diatoms and dinoflagellates," 387 : 387-584, 1996

19 "Cochlodinium polykrikoides 적조 발생기작과 대책: 1. Cochlodinium polykrikoides 적조 발생과 소멸의 환경특성," 6 : 259-264, 2001

20 "Characteristics of spatio-temporal variation of the water quality in the lower Keum River" 225-237, 1990

21 "An outline of oceanophysics" Jipmundang Press 225-, 1996

22 "1999년도 한국연안의 적조발생상황" 국립수산진흥원 206-, 2000