황해 중형동물플랑크톤 군집 구조와 요각류 Calanus sinicus의 생산력과 섭식
- Abstract
- Seasonal variations in the mesozooplankton community, and the production and feeding of the copepod Calanus sinicus were studied in the Yellow Sea in April 2019(spring), August 2020(summer), November 2021(autumn) and early March 2022(winter). Mesozooplankton community structure was investigated with environmental factors. The total production of C. sinicus was estimated by measuring the somatic and egg production rate. The ingestion rate of C. sinicus was calculated by estimating the amount of gut pigments.
The water column mean temperature in the study area ranged 7.4-11.0℃ in spring, 13.6-22.5℃ in summer, 13.3-17.7℃ in autumn and 3.8-9.5℃ in winter by sampling stations. The mean salinity ranged from 31.7-33.2 psu in spring, 31.1-32.8 psu in summer, 31.2-32.4 psu in autumn and 31.6-32.9 psu in winter. The mean chlorophyll-a(chl-a) concentration was ranged 0.7-3.8 ㎍ L-1 in spring, 0.3-4.8 ㎍ L-1 in summer, 0.3-1.9 ㎍ L-1 in autumn and 0.5-8.0 ㎍ L-1 in winter.
The mean abundance of mesozooplankton was 2,980 inds. m-3 in spring, 3,023 inds. m-3 in summer, 3,831 inds. m-3 in autumn and 2,347 inds. m-3 in winter. The mean biomass of mesozooplankton was 11.3 mg C m-3 in spring, 10.2 mg C m-3 in summer, 10.6 mg C m-3 in autumn and winter. The dominant species throughout the all seasons were Paracalanus parvus s.l., Oithona similis and its copepodites. The four-season integrated mesozooplankton abundance and biomass showed a significant positive correlation with temperature and chl-a, respectively. The mesozooplankton community of spring, summer and winter were divided into two to five groups according to longitude, whereas the community of autumn was divided into three groups based on latitude.
The mean population abundance of Calanus sinicus was 272 inds. m-3 in spring, 124 inds. m-3 in summer, 230 inds. m-3 in autumn and 119 inds. m-3 in winter. The mean population biomass of C. sinicus was 3.6 mg C m-3 in spring, 2.8 mg C m-3 in summer, 4.0 mg C m-3 in autumn and 2.9 mg C m-3 in winter. The mean daily total production of C. sinicus population was 257.8 ㎍ C m-3 d-1 in spring, 105.1 ㎍ C m-3 d-1 in summer, 204.4 ㎍ C m-3 d-1 in autumn and 111.7 ㎍ C m-3 d-1 in winter. The somatic, egg, total production of C. sinicus were positively correlated to chl-a concentrations.
The population ingestion rate of Calanus sinicus from copepodite I(CI) to adult was 39.7 ㎍ chl m-3 d-1 in spring, 9.3 ㎍ chl m-3 d-1 in summer and autumn, 15.9 ㎍ chl m-3 d-1 in winter. The ingestion rate of CI-CIII was positively correlated with water temperature, whereas CIV-CVI(adult) was related with chl-a concentration. The grazing pressure of C. sinicus population was 1.66% in spring, 1.43% in summer, 2.04% in autumn and 0.65% in winter.
The dominant species in the Yellow Sea did not differ from previous studies. The distribution of Calanus sinicus in summer in this study was wider than the previous studies in the midwest Yellow Sea, questioning the over-summering hypothesis of this species. The total productivity of C. sinicus population and the feeding rate of early copepodites were quantified for the first time in the Yellow Sea.
- Issued Date
- 2023
- Awarded Date
- 2023-02
- Type
- Dissertation
- Keyword
- 동물플랑크톤, 요각류, Calanus sinicus
- Publisher
- 부경대학교
- Affiliation
- 부경대학교 대학원
- Department
- 대학원 해양생물학과
- Advisor
- 박원규
- Table Of Contents
- 제 1 장 서 론 1
제 2 장 황해 중형동물플랑크톤 군집 3
2.1 서 론 3
2.2 재료 및 방법 5
2.2.1 시료 채집 5
2.2.2 환경 조사 5
2.2.3 시료 분석 7
2.2.4 자료 분석 7
2.3 결 과 9
2.3.1 환경 9
2.3.1.1 수온과 염분의 수직 분포 9
2.3.1.2 Chl-a 농도의 수평 분포 10
2.3.2 중형동물플랑크톤 개체수와 생체량 18
2.3.2.1 개체수와 생체량의 계절 변동 18
2.3.2.2 분류군별 개체수 변동 19
2.3.2.3 계절별 우점종의 개체수 분포 25
2.3.2.4 계절 종합 우점종 31
2.3.3 중형동물플랑크톤에 대한 환경 요인의 영향 32
2.3.3.1 계절별 환경 요인과의 상관 분석 32
2.3.3.2 계절별 환경 요인과의 중복 분석 33
2.3.3.3 계절 종합 환경 요인의 영향 43
2.3.4 중형동물플랑크톤 군집 그룹 분석(Cluster Analysis) 47
2.3.4.1 군집 그룹(Cluster)과 지표종의 계절 변동 47
2.4 고 찰 57
제 3 장 황해 Calanus sinicus의 개체군 구조와 생산력 61
3.1 서 론 61
3.2 재료 및 방법 63
3.2.1 연구 정점 63
3.2.2 개체군 구조 63
3.2.3 생산력 측정 65
3.2.3.1 몸 생산력(Somatic production rate) 측정 65
3.2.3.1.1 생체량 추정 65
3.2.3.1.2 성장률(Growth rate) 실험 및 계산 66
3.2.3.2 알 생산력(Egg production rate) 측정 67
3.2.3.2.1 암컷 개체당 알 생산력 실험 67
3.2.3.2.2 암컷 무게당 알 생산력 계산 68
3.2.4 자료 분석 69
3.3 결 과 70
3.3.1 Calanus sinicus 개체군 구조 70
3.3.1.1 개체군 개체수 분포와 발생 단계 구성 70
3.3.1.2 개체군 생체량 분포와 발생 단계 구성 71
3.3.1.3 개체군 개체수와 생체량에 대한 환경 요인의 영향 80
3.3.2 Calanus sinicus 생체량 추정 83
3.3.2.1 두흉부 길이의 계절 변동 83
3.3.2.2 길이-무게 관계식 87
3.3.3 Calanus sinicus 생산력 88
3.3.3.1 몸 생산력 88
3.3.3.1.1 성장률 88
3.3.3.1.2 몸 생산력의 계절 변동 89
3.3.3.2 알 생산력 89
3.3.3.2.1 암컷 개체당 알 생산력 89
3.3.3.2.2 암컷 무게당 알 생산력 90
3.3.3.2.3 알 생산력의 계절 변동 91
3.3.3.3 총 생산력 91
3.3.4 생산력 변수들에 대한 환경 요인의 영향 99
3.3.4.1 계절별 상관 분석 99
3.3.4.2 계절 종합 상관 분석 99
3.4 고 찰 105
제 4 장 황해 Calanus sinicus의 섭식 111
4.1 서 론 111
4.2 재료 및 방법 113
4.2.1 연구 정점 113
4.2.2 시료 채집 및 분석 113
4.2.3 체내색소량(Gut pigment contents) 측정 115
4.2.4 섭식률(Ingestion rate) 115
4.2.5 개체군 섭식률(Population ingestion rate) 116
4.2.6 섭식압(Grazing pressure) 116
4.2.7 자료분석 116
4.3 결 과 118
4.3.1 Calanus sinicus 발생 단계별 섭식률 118
4.3.1.1 체내색소량의 계절 변동 118
4.3.1.2 섭식률의 계절 변동 118
4.3.1.3 개체군 섭식률의 계절 변동 119
4.3.1.4 섭식압의 계절 변동 120
4.3.2 섭식에 대한 환경 요인의 영향 127
4.3.2.1 계절별 상관 분석 127
4.3.2.2 계절 종합 상관 분석 127
4.4 고 찰 135
제 5 장 종합 결론 138
제 6 장 참고문헌 141
부 록 159
- Degree
- Doctor
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