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NTIS 바로가기Ocean and polar research, v.35 no.4, 2013년, pp.427 - 439
고아라 (한국해양과학기술원 심해저자원연구부) , 김민섭 (국립환경과학원 환경측정분석센터) , 주세종 (한국해양과학기술원 심해저자원연구부)
Carbon cycling and productivity within Weno Island of Micronesia enclosed by the coral reef may be likely self-maintained and insignificantly affected by the open ocean. Therefore, it is important to understand the role of the mangrove known as providing the organic matter and habitats for many orga...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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질소 안정동위원소를 통해서 생태계 구성생물들 사이의 영양단계를 추정할 수 있는 이유는 무엇입니까? | 탄소 안정동위원소는 물리화학적 분별작용(fractionation)이 큰 반면, 생물 특히 영양단계를 통한 분별작용은 매우 미미하여 상위 영양단계에서도 생산자의 탄소기원을 추적하는데 적절하다. 질소 안정동위원소의 경우, 동물들은 가벼운 질소(14N)를 우선적으로 배출하고 체내에 무거운 질소(15N)를 축적한다. 따라서 상위 영양단계로 갈수록 무거운 질소가 일정하게 농축되고, 질소 안정동위원소 비도 증가하게 된다. 이를 통해 생태계 구성생물들 사이의 영양단계를 추정할 수 있다(Gu et al. 1996; Vizzini et al. 2002). 이뿐만 아니라, 맹그로브를 포함한 식물의 질소 안정동위원소 비는 퇴적물에서의 식물과 미생물간 상호작용 및 질소 기원 등의 다양한 과정을 반영한다(Dawson et al. | |
지방산이 먹이 추적자로 활용되기에 어려운 이유는 무엇입니까? | 2003; Ju and Harvey 2004). 더욱이 지방산은 생체 내에서의 짧은 순환주기(일~주)로 장기간의 먹이원을 대변하기에는 어려움이 있다(Cook 1991; Pond et al. 1995; Alfaro et al. 2006). | |
생화학적 기법은 어디에 활용되고 있습니까? | 생화학적 기법(지방 바이오 마커 및 안정동위원소)은 다양한 해양생태계에서의 먹이망 구조 및 유기물 기원을 추적하기 위한 연구에 활용되고 있다(Budge et al. 2008; Belicka et al. 2012; Lecea et al. 2013; McMeans et al. 2013). 일부 지방산은 생물의 생존과 성장에 필수적이며, 특정 생산자만이 합성할 수 있어서 소비자는 생산자를 통해서만 이를 직간접적으로 획득할 수 있다. |
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