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pp.80-88
In order to reconstruct a benthic foodweb structure and assess the role of benthic microalgaes as a diet source for benthos, we analyzed the carbon and nitrogen stable isotopes of diverse benthos (bivalves, crustaceans, gastropods and fishes) and potential diets (particulate organic matter, sedimentary organic matter, benthic microalgae, seagrass, and macroalgaes) in the intertidal mudflat surrounding Yeongheung Island. The δ13C values of the diets indicated wide ranges (- 26.5‰ to - 8.4‰) while benthos showed a small range of δ13C values (-12.1‰ to - 17.8‰), although they were in the same range. Except for green algaes among the macroalgaes as well as sedimentary organic matter, δ15N values of the diet candidates (5.7±1.0‰) were lighter in comparison to those of the benthos (11.8±1.9‰). Based on the δ13C and δ15N data, the benthos were classified into 3 groups, indicating a different diet and trophic position. But benthic microalgae is the most important diet source for all three benthos groups based on their stable isotope ratios, suggesting benthic microalgae should be a main diet to the intertidal ecosystem. Hence this study highlights that the biomass of benthic microalgae as biological resource should be evaluated for the management of the intertidal ecosystem of Yeongheung Island.
재료 및 방 법
1. 연구 정점
2. 시료의 채집 및 전처리
3. 안정동위원소 분석
4. 영양단계 (Trophic Position, TP)
5. Iso source mixing model
결과 및 고 찰
1. 먹이원의 안정동위원소비
2. 저서동물의 안정동위원소비
3. 생태적 지위 (Trophic position, TP)
4. 먹이원 기여도 평가
적 요
REFERENCES
