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논 생태계에서 영양관계에 대한 지방산 바이오마커
- Alternative Title
- Soonjea, Eum
- Author(s)
- 엄순재
- Alternative Author(s)
- Soonjea, Eum
- Advisor
- 박상규
- Department
- 일반대학원 생명과학과
- Publisher
- The Graduate School, Ajou University
- Publication Year
- 2011-08
- Language
- eng
- Keyword
- biomarker; fatty acid; food web; food source
- Alternative Abstract
- 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.
- Fulltext
- Appears in Collections:
- Graduate School of Ajou University > Department of Bioscience > 3. Theses(Master)
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