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NTIS 바로가기환경생물 = Korean journal of environmental biology, v.35 no.1, 2017년, pp.83 - 94
한중수 (상지대학교 생명과학과) , 왕주현 (상지대학교 생명과학과) , 김정은 (상지대학교 생명과학과) , 정진호 (고려대학교 환경생태공학부) , 배연재 (고려대학교 환경생태공학부) , 최준길 (상지대학교 생명과학과) , 이황구 (상지대학교 생명과학과)
Benthic macroinvertebrates were investigated in thermal discharge that flows Buso stream region from December 2015 to February 2016, Korea. Study site was selected for the upstream, downstream relative to the mixing station and mixing station which thermal effluent flows, water quality analysis and ...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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고온의 방류수가 하천에 유입될 경우 대형무척추동물의 군집구조에 영향을 미친다고 생각되는 조사 결과는 무엇인가? | 전체적으로 상류와 하류 지점에서는 콩알하루살이 (Acentrella sibirica), 감초하루살이, 깜장하루살이, 몽땅하루살이, 두점하루살이(Ecdyonuruskibunensis), 민강도래 KUa (Nemoura KUa), 먹파리류, 물날도래 KUa, 검은머리물날도래, 네모집날도래 KUa 등 냉수성을 선호하는 종의 출현이 높은 것으로 나타났으며, 반대로 온도에 내성이 강한 실지렁이 및 깔따구류와 비교적 내성의 범위가 넓은 동양하루살이(Ephemera orientalis), 등딱지하루살이 KUa (Caenis KUa) 등은 혼합역에서 높게 출현하였다. 결과적으로 혼합역에서 상대적으로 출현종 및 개체수가 가장 낮은 것으로 조사되었으며, 오염 및 수온의 내성 범위가 높은 종들이 대부분을 차지하고 있었다. 따라서 고온의 방류수가 하천에 유입될 경우, 냉수성 종에 대한 서식환경의 교란으로 인해 고수온의 영향권내에 서식하는 저서성 대형무척추동물의 군집구조에 부정적인 영향을 미치고 있는 것으로 생각되며, 이로 인해 냉수성 종들의 분포에 제한을 받는 것으로 판단된다. | |
온배수란 무엇인가? | 온배수(Thermal discharges)란 발전소에서 사용한 냉각수, 온천, 폐수처리장 등에서 이용되는 자연 수온보다 높은 온도의 상태로 주변의 하천, 호소 등에 방출되는 방류수를 의미한다 (Kim 2000). 수온은 하천생태계에서 물리적 특성을 결정하고 생리기능, 생물의 분포 및 진화에 영향을 미치며(Leeper and Taylor 1995), 자연 수온보다 높은 온배수는 하천 생태계의 인위적 온도변화 요인으로 하천, 호소의 수온을 상승시킨다(Kim 2000). | |
저서성 대형무척추동물이 환경 변화 지표생물이 될 수 있는 까닭은 무엇인가? | 하천 생태계의 생물군집은 동·식물성 플랑크톤, 연체동물, 환형동물 등의 하등생물부터 담수어류 등과 같은 고등동물까지 다양한 생물군으로 구성되어 있으며(McCafferty 1981), 이러한 생물군 중에서 저서성 대형무척추동물은 하천 생태계의 주요 변화요인인 물리적 요인, 화학적 요인, 생물학적 요인 등의 환경변화에 민감하게 작용한다 (Kim 2013). 대부분이 고착생활을 하고, 제한된 이동성을 가진 저서성 대형무척추동물은 환경의 급격한 변화에 능동적으로 대처하는 능력이 낮고(Im 2015), 비교적 뚜렷한 내성범위를 갖고 있어 환경 변화를 평가하는 지표생물로써 매우 효과적인 것으로 알려져 있다(Hynes 1960; Wiederholm 1983; Bea et al. 2003). |
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