논 생태계에서 영양관계에 대한 지방산 바이오마커
Fatty acid biomarkers of trophic relations in rice paddy fields
- 주제(키워드) biomarker , fatty acid , food web , food source
- 발행기관 아주대학교
- 지도교수 박상규
- 발행년도 2011
- 학위수여년월 2011. 8
- 학위명 석사
- 학과 및 전공 일반대학원 생명과학과
- 실제URI http://www.dcollection.net/handler/ajou/000000011915
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
To search useful fatty acid biomarkers in evaluating trophic relations or food web structure of complex rice paddy food webs, fatty acid compositions of a large number of aquatic invertebrates and vertebrates were investigated at rice paddy fields in Hong-Sung, South Korea. The studied paddy fields were managed under conventional practice, organic practice with winter flooding, and organic practice without winter flooding. In our study, 18:1ω9 content showed very strong relationship with δ15N signature, indicating that oleic acid would be a good biomarker for inferring trophic position. Also we found that three fatty acids appeared to be good biomarkers for food sources in organic rice paddy fields. α-linoleic acid (18:3ω3) contents were high in green plants such as green algae, vascular plants and chara species. 16:1ω7/16:0 appeared to be a good biomarker for diatoms. 18:1ω9 (oleic acid) contents appear to be a good biomarker for detrital sediment. Using these three identified biomarkers for food sources and stable isotope data, we summarize food webs in rice paddy field ecosystem.
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