Korean Journal of Ecology and Environment (생태와환경)

The Korean Society of Limnology (한국수생태학회)
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Determination of the Origin of Particulate Organic Matter at the Lake Paldang using Stable Isotope Ratios (${\delta}^{13}C$, ${\delta}^{15}N$)

입자성 유기물의 안정동위원소비를 이용한 팔당호 수계내의 유기물 기원 연구

  • 김민섭 (국립환경과학원 환경측정분석센터) ;
  • 김종민 (국립환경과학원 환경측정분석센터) ;
  • 황종연 (국립환경과학원 환경측정분석센터) ;
  • 김보경 (국립환경과학원 환경측정분석센터) ;
  • 조항수 (국립환경과학원 환경측정분석센터) ;
  • 윤석제 (국립환경과학원 환경측정분석센터) ;
  • 홍석영 (국립환경과학원 환경측정분석센터) ;
  • 권오상 (국립환경과학원 환경측정분석센터) ;
  • 이원석 (국립환경과학원 환경측정분석센터)
  • Received : 2014.06.13
  • Accepted : 2014.06.30
  • Published : 2014.06.30
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Abstract

Organic carbon and nitrogen stable isotope ratios of particulate organic matter (POM) were determined at 7 stations (6 stations in Han river and Paldang dam outflow station) from May to October 2013, in order to understand the origin of POM at the Han river. ${\delta}^{13}C$ values of POM in four stations showed significant seasonal changes season, but ${\delta}^{15}N$ values were enriched in around Kyeongan stream (K). POC, PN and Chl-a concentration showed a similar seasonal pattern in Kyeongan stream, with an apparent decrease from July to August. POC and PN concentration has a higher correlation with Chl-a concentration in Kyeongan stream (K). ${\delta}^{13}C$ and ${\delta}^{15}N$ values of POM has a lighter value during lower Chl-a concentration peroid, compared to other seasons. Our results revealed that Kyeongan stream (K) seemed to be influenced by substantial amount of organic manure or fertilizer input in 2013, compared to the previous year (2012). These results suggest that the analysis of stable isotope ratios is a simple but useful tool for the identification of organic matter origin in aquatic environments.

본 연구는 안정동위원소 분석방법을 적용하여, 호소내 식물플랑크톤 성장에 영향을 미치는 외부 오염원의 기원을 추정함으로써, 효율적인 수질 관리 및 수생태계 기능해석을 제공하기 위하여 연구하였다. POC, PN, Chl. a, 탄소 안정동위원소비 및 질소 안정동위원소비의 자료로 유추해 보았을 때, 팔당댐, 남한강, 북한강 지역에 비해서 경안천 지역에서 계절에 따른 유기물의 기원 변동이 뚜렷하게 관찰되고 있다. 유입량 및 강우량이 많은 시기인 7, 8월경에 입자성 유기물의 기원이 자생기원 유기물보다는 외부기원 유기물이 높은 영향을 미치는 것으로 여겨진다. 한강 유역에서 입자성 유기물의 탄소 및 질소 안정동위원소비를 이용한 유기물 기원 연구는 적용가능 할 것으로 여겨지며, 추후 유역 오염원의 대표값(end member)의 지속적인 조사를 통하여 자료구축이 이루어져야 할 것이다.

Keywords

References

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