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NTIS 바로가기한국환경생태학회지 = Korean journal of environment and ecology, v.25 no.5, 2011년, pp.691 - 709
박영준 (국립환경과학원 자연자원연구과) , 김기동 (국립환경과학원 자연자원연구과) , 조영호 (대전대학교 생명과학과) , 한용구 (대전대학교 생명과학과) , 김영진 (대전대학교 생명과학과) , 남상호 (대전대학교 생명과학과)
This study was performed to classify habitat types depending on environmental factors and to find out distribution characteristics of functional feeding groups of aquatic insects which were collected at that habitat types. Field survey was conducted twice in a year for every spring and fall from 200...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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기존 하천생태계 평가 및 관리의 문제점은 무엇인가? | 또한 최근 4대강 살리기 사업과 하천주변 신도시개발 등 다양한 환경변화요인이 하천생태계에 지속적으로 발생되고 있어, 그 관심이 날로 증가하고 있다. 그러나 기존 하천생태계 평가 및 관리는 생물학적 특성을 고려하지 않은 물리적 환경 및 이화학적 수질개선대책 위주의 관리에 의존함으로서 하천환경 악화나 개선의 필요성과 같은 문제점들이 지속적으로 나타나게 되는 원인이 되고 있으며, 향후 계획도 이러한 틀에서 크게 벗어나고 있지 않다(Song and Park, 2003; Hwang et al., 2006). | |
하천생태계에 영향을 미치는 주요한 환경요인 중 화학적 요소에는 어떤 것이 있는가? | 하천생태계에 영향을 미치는 주요한 환경요인은 고도, 유속, 유량, 수심, 하상재료, 토양, 온도, 빛, 강수량과 기후 등의 물리적 요소와 pH, BOD, DO 등의 화학적 요소로 구분할 수 있으며, 생물 구성원은 크게 조류(algae)와 수변 및 수중식물 등의 생산자와 저서성 대형무척추동물과 어류 및 양서류와 같은 소비자 그리고 박테리아와 곰팡이 같은 미생물로 구성된 분해자로 구별된다(Allan, 1995). 특히, 수서곤충은 저서성 대형무척추동물의 종 및 개체수 현존량에서 대부분을 차지하고 있어 하천 담수동물 중에서 가장 다양하고 풍부한 무리일 뿐만 아니라(Rosenberg and Resh, 1993), 영양단계의 저차 소비자(1차 또는 2차 소비자가 대부분)이기 때문에 하천생태계 구성원으로서 매우 중요한 역할을 하고 있다(Hynes, 1970; Ward, 1992; Willam and Feltmate, 1992). | |
하천생태계의 효율적인 관리 및 평가를 위해서는 무엇이 선행되어야 하는가? | , 1980; Horne and Goldman, 1994; Allan, 1995), 그 안에 서식하는 생물군집의 구조와 기능을 결정하는 중요한 요인으로서 영향을 미치게 된다. 하천의 효율적인 관리 및 평가를 위해서는 하천들의 특성이 파악되어야하며, 이들 특성의 유사성과 상이점 등에 의해 비슷한 종류끼리 묶어내는 유형화 작업이 선행되어야 한다(Song and Park, 2003). 이와 같은 생물적인 요소의 환경변화에 대한 반응은 생태계내에 기능적 구성요소인 군집의 범위 내에서 일어나는 현상이며 (Ro et al. |
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