Stable isotope approach for aquatic ecology and environmental sciences has been introduced as very useful technique since 1980s and also has been applied to investigate various issues in aquatic ecology and environmental study last 10 years in Korea. Especially carbon and nitrogen isotope ratios have been mainly used to understand food web energy flow and ecosystem structure. In addition, nitrogen isotope ratio has been applied for nitrogen cycle and source identification as well as biomagnification studies. However, large temporal or spatial variations of nitrogen isotope ratio of primary producer have been found in many aquatic environments, and it is regarded as the critical problems to determine trophic level of aquatic animals. Recently, the compound specific isotope analysis of nitrogen within individual amino acids has been developed as an alternative method for trophic ecology. This article introduces the progress history of stable isotope application in aquatic ecology and environmental sciences, and also suggests new direction based on future prospects in stable isotope ecology and environmental study.

Abstract
 안정동위원소를 활용한 수생태계먹이망 구조 연구
 국내 수생태계 먹이망 구조 연구에 안정동위원소비의 활용 사례
 질소 안정동위원소비를 이용한 수생태계주요 생물의 영양단계 파악 연구
 영양단계 산정 연구를 위한 아 미노산의질소 안정동위원소비 분석기법의 도입
 다양한 수생태계 연구에 아미노산의질소 안정동위원소비의 활용 전망
 적 요
 References

• 최보형(한양대학교 해양융합과학과) | Choi, Bohyung (Department of Marine Sciences and Convergent Technology, Hanyang University)
• 신경훈(한양대학교 해양융합과학과) | Kyung-Hoon Shin (Department of Marine Sciences and Convergent Technology, Hanyang University) Corresponding author