보고서 정보
주관연구기관 |
전남대학교 Chonnam National University |
연구책임자 |
서해립
|
참여연구자 |
김광용
,
조수근
,
한경호
,
최상덕
,
정준호
|
발행국가 | 대한민국 |
언어 |
한국어
|
발행년월 | 2001-12 |
주관부처 |
해양수산부 |
사업 관리 기관 |
전남대학교 Chonnam National University |
등록번호 |
TRKO200300000096 |
DB 구축일자 |
2013-04-18
|
초록
▼
본 연구는 3개년에 걸쳐 이루어졌으며, 종묘방류해역의 해양환경과 생태계를 구명하기 위하여 1차년도에는 생태기초조사를 실시하였고, 2차년도에는 생태적 수용능 조사에 필요한 자료를 수집하였다. 1·2차년도의 연구결과를 바탕으로 3차년도에는 치어의 적정 방류량과 어종을 구명하였다. 전체 연구내용과 과정은 다음 표와 같다.
◎ 1차년도(1998년)
구분 : 전남 동부 종묘방류해역의 상태 기초조사
내용 및 범위
1) 해양환경 기초조사
2) 부유동식물상 조사
3) 저서동물상 조사
본 연구는 3개년에 걸쳐 이루어졌으며, 종묘방류해역의 해양환경과 생태계를 구명하기 위하여 1차년도에는 생태기초조사를 실시하였고, 2차년도에는 생태적 수용능 조사에 필요한 자료를 수집하였다. 1·2차년도의 연구결과를 바탕으로 3차년도에는 치어의 적정 방류량과 어종을 구명하였다. 전체 연구내용과 과정은 다음 표와 같다.
◎ 1차년도(1998년)
구분 : 전남 동부 종묘방류해역의 상태 기초조사
내용 및 범위
1) 해양환경 기초조사
2) 부유동식물상 조사
3) 저서동물상 조사
4) 유영동물상 조사
◎ 2차년도(1999년)
구분 : 전남 동부 종묘방류해역의 생태적 수용능 조사
내용 및 범위
1) 해양환경 기초조사
2) 일차생산량(부유식물, 해조류) 조사
3) 이차생산량(저서, 부유동물) 조사
4) 어류 섭식생리생태 조사
◎ 3차년도(2000년)
구분 : 참돔·넙치 치어 적정방류 기술개발
내용 및 범위
1) 해양환경 기초조사
2) 방류해역의 먹이사슬 조사
3) 치어 적정 방류량 및 시기 조사
4) 생태계 모델링 분석
Abstract
▼
Phytoplankton biomass and primary productivity at the surf zone of sandy beach
Seasonal and diel variations of Chl-α and primary productivity of phytoplankton were measured at the surf zone of sandy beach inDolsan-do, Jeonnam Province. During the study period, Chl-α concentration at the sur
Phytoplankton biomass and primary productivity at the surf zone of sandy beach
Seasonal and diel variations of Chl-α and primary productivity of phytoplankton were measured at the surf zone of sandy beach inDolsan-do, Jeonnam Province. During the study period, Chl-α concentration at the surf zone varied larger than that at the nearshore. At the surf zone, Chl-α concentration was higher in the period of flood tide than ebb tide. The benthic microalgae, suchas Navicula sp., Pseudo-nitzchia se. and Pleurosigma sp. predominated in the phytoplankton communities. Proportion ofnanoplankton increased in ebb tide to 120% larger than in flood tide. This suggests that tidal currents directly affected suspensionof benthic algae. Primary productivity at the surf zone, 6.5-317.1 mg $C·m^{-3}·h^{-1}$, was higher thanthat at the near shore. Productivity per Chl-α was 2.4-27.1 mg C·mg Chl-α¹·$h^{-1}$. Optimum light intensity ofphytoplankton at surf zone ranged 165-634 $μmol·m^{-2}·sec^{-1}$, suggesting that there is a higher light adaptationof the surf-zone phytoplankton
Diel, tidal and seasonal effects on the distribution of Acartia omorii (Copepoda: Calanoida) in a sandy-shore surf zone of Dolsan Island
In s sandy shore surf zone of Dolsan Island, diel, tidal, and seasonal effects on abundance of Acartia omorii were investigated from three sites, the bottom and surface of 1 m depth and water's edge using a sledge-net. Of these sites the abundance of A.omorii was the highest in the bottom. Seasonal abundance data showed that A. omorii was more abundant in winter than other seasons. During the study period, the abundance of A. omorii was always higher during ebb tide than flood. The distribution pattern of A. omorii was more influenced by tide than diel change. Strong current during spring tide possiblely affected the dielmigration pattern. In winter A. omorii showed a diel vertical migration in neap tide, whereas it showed a reverse vertical dielmigration in spring tide. Distribution centers were located at a layer of 50∼100 cm below mean sea level (MSL) during neap tide, and then it moved slightly upward during spring tide.
Seasonal zonation patterns of benthic amphipods in a sandy shore surf zone of Korea
Seasonal zonation patterns of amphipods haven with various life styles and feeding habits were analyzed in a temperate sandy shore surf zone using a sledge net. The range in distribution of the burrowers Synchelidium lenorostralum and Urothoeconvexa did not change seasonally: the former was usually found in the sandy shore from 1.0 to 3.0 m below mean sea level (MSL) and the latter from 3.0 to 0 m below MSL. On the other hand, the distribution ranges of the nestlers Pontogeneia rostrata and Allorchestes angusta and the epifaunal tube-dweller Jassa slatteryi were restricted from 1.0 m above to 2.0 m below MSL, showing seasonal movement from below MSL in winter to above MSL in summer. Distribution centers of P. rostrata and A. angusta were located at 1.0 m below MSL and at 1.0 m above MSL in summer, respectively. This implies that habitat segregation occurred in summer. Gut contents analysis revealed that S. lenorostralum fed mainly on harpacticoid copepods, while P. rostrata, A. angusta, and U. convexa fed on phytoplankton and detritus. It is likely, therefore, that in summer, the segregation between P. rostrata and A. angusta may reduce competition for food. We suggest that feeding habits and life styles of amphipods in the sandy shore surf zone may be important factors controlling seasonal zonation patterns.
Life history and reproduction of Synchelidium lenorostralum in a temperate sandy shore, southern Korea
The life history and population structure of the amphipod Synchelidium lenorostralum were studied monthly for one year in the sandy shore at Dolsando, southern Korea. The life history pattern was annual and iteroparous, with two dominant recruitments in fall(October to December) and spring (March to May). The sex ratio was female-biased, especially during breeding periods. The maximum size of females was 10.8 mm and 1.4 times larger than that of males. The mean body length of adults and brood size were greater in the spring breeding period than in the fall. There was a positive relationship between the brood size and body length of ovigerous females. The mean egg volume of stage I was more than 0.04 mm3 in December and March, but in other months it was less than 0.03 mm3. Egg volume was positively related to body length of ovigerous females and increased significantly at the phase between stage I and II. However, no significant relationship between egg volume and brood size was found. At any given female size, egg volume was significantly higher in the fall breeding than in the spring, whereas brood size was not different between the two main breeding periods, suggesting higher reproductive effort during the fall breeding period
Secondary production of Synchelidium lenorostralum in a temperate sandy shore, southern Korea
Secondary production of the amphipod Synchelidium lenorostralum was examined in a temperate sandy shore, southern Korea, on the basis of monthly samples from June 1996 to July 1997. Secondary production was estimated by the size-frequency method. Biomass structure showed two peaks in fall and spring, with maximum biomass in April. Biomass in the spring breeding period was higher than that in the fall. The annual secondary production of S. lenorostralum was 1.09 g DW m-2 yr 1 with an annual P/B ratio of 5.68. Secondary production of S. lenorostralum fell within the range observed for other amphipods from intertidal sandy shores, whereas the P/B ratio was higher than that recorded previously. The combination of high abundance and a high P/B ratio suggests an important role for S. lenorostralum in the sandy ecosystem as a trophic link from primary producers to higher consumers
Trophic structure model and energy flux in a sandy beach ecosystem of Dolsan-do
Using Ecopath program trophic structure model and energy fluxes in a sandy beach ecosystem of Dolsan-do were predicted. Maximum release number of flounder larvae was calculated with Ecosim simulation. Energy flux of harpacticoid copepods was 309.4 g$DW·m^{-2}·yr^{-1}$, suggesting that harpacticoids acted as a remarkable linker between primary producer and secondary consumer. In contrast, energy flux of benthos was 79.8 g$DW·m^{-2}·yr^{-1}$. Important secondary consumers were amphipods and planktonic copepods, having flux of 8.5 and 37.8g$DW·m^{-2}·yr^{-1}$, respectively. In the study area, maximum release number of flounder larvae (40 mm in BL) was calculated at 25,600.
목차 Contents
- 제1장. 서론...25
- 제2장. 모래해안 쇄파대 식물플랑크톤의 일차생산력...27
- 제1절. 서론...27
- 제2절. 재료 및 방법...28
- 제3절. 결과...31
- 참고문헌...36
- 제3장. 돌산도 모래해안 쇄파대에 나타나는 요각류 Acartia omorii 분포에 미치는 주야ㆍ조석ㆍ계절효과...39
- 제1절. 서론...39
- 제2절. 재료 및 방법...40
- 제3절. 결과...42
- 제4절. 토의...50
- 참고문헌...53
- 제4장. 모래해안 쇄파대에서 사는 저서성 단각류의 계절적 분포양상...57
- 제1절. 서론...57
- 제2절. 재료 및 방법...58
- 제3절. 결과...59
- 제4절. 토의...66
- 참고문헌...71
- 제5장. 모래해안에 사는 저서성 단각류 Synchelidium lenorostralum의 생활사와 개체군 역학...77
- 제1절. 서론...77
- 제2절. 재료 및 방법...78
- 제3절. 결과...79
- 제4절. 토의...87
- 참고문헌...91
- 제6장. 모래해안에서 사는 저서성 단각류 Synchelidium lenorostralum의 이차생산...97
- 제1절. 서론...97
- 제2절. 재료 및 방법...98
- 제3절. 결과...99
- 제4절. 토의...104
- 참고문헌...108
- 제7장. 돌산도 모래해안 생태계의 영양구조 모델과 에너지 수지...115
- 제1절. 서론...115
- 제2절. 재료 및 방법...116
- 제3절. 결과 및 토의...121
- 참고문헌...127
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