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팔당호 난분해성 유기물에 대한 조류기원 유기물의 기여
Algal Contribution to the Occurrence of Refractory Organic Matter in Lake Paldang, South Korea: Inferred from Dual Stable Isotope (13C and 15N) Tracer Experiment 원문보기

생태와 환경 = Korean journal of ecology and environment, v.52 no.3, 2019년, pp.192 - 201  

이연정 (한국해양과학기술원 해양생태연구센터) ,  하선용 (극지연구소 극지해양과학 연구부) ,  허진 (세종대학교 환경에너지공간융합학과) ,  신경훈 (한양대학교 해양융합과학과)

초록
AI-Helper 아이콘AI-Helper

효과적인 물환경관리계획을 수립하기 위해서는 다양한 기원의 유기물이 난분해성 유기물 농도 증가에 영향을 줄 수 있는지 여부를 파악하는 것이 중요하다. 특히 상당량의 광합성 산물은 식물플랑크톤에 의해 매일 생성되고 있지만, 이들이 수계 내 난분해성 유기물에 기여하는지에 대한 정보는 부족하다. 본 연구에서는 $^{13}C$ 및 $^{15}N$ 추적자 첨가실험을 통해 조류기원 유기물이 생분해(60일, 암배양) 및 산화제(과망간산칼륨) 처리 후 분해되지 않고 잔존하는지 여부를 확인하였다. 생분해 실험 결과 광합성을 통해 생성된 총 유기탄소($TO^{13}C$), 입자성 유기탄소($PO^{13}C$), 입자성 질소($P^{15}N$)는 각각 26%, 20%, 17%가 비 생분해성 유기물로 잔존하였다. 또한 상당량의 $PO^{13}C$가 과망간산칼륨에 의해 산화되지 않고 잔존하였다(초기: 12%, 60일 암배양 후: 38%). 이는 미생물에 의해 사용된 후 남아있는 조류기원 유기물이 난분해성 유기물에 기여할 수 있음을 의미한다. 또한 미생물에 의해 변형된 조류기원 유기물의 양은 COD 산화율 및 유기물 지표 간 격차에 영향을 줄 것으로 사료된다.

Abstract ▼ AI-Helper 아이콘AI-Helper

While a fairly large amount of organic matter is produced daily via phytoplankton photosynthesis in Lake Paldang, South Korea, knowledge of the role of algal-derived organic matter (OM) as a refractory OM source is not adequate. To understand the contribution of algal-derived OM to the refractory po...

주제어

# $^{13}C$ tracer method   #primary productivity   # $KMnO_4$ oxidation   #non-biodegradable organic matter   #non-oxidized organic matter  

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