The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY (한국해양학회지:바다)

The Korean Society of Oceanography (한국해양학회)
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Development of Sediment Toxicity Test Protocols using Korean Indigenous Marine Benthic Amphipods

국내산 저서 단각류를 이용한 퇴적물 독성시험법 개발에 관한 연구

  • 이정석 ((주)네오엔비즈 환경안전연구소) ;
  • 이승민 (국립수산과학원 서해수산연구소) ;
  • 박경수 (안양대학교 해양생명공학과)
  • Published : 2008.05.31
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Abstract

A series of experiments were conducted to find standard test organisms and to develop test protocols for sediment toxicity tests using indigenous amphipods inhabited in Korean coastal environments. The indigenous amphipods Mandibulophoxus mai and Monocorophium acherusicum were well associated with various sediment substrates from sand to mud. The tolerance limits to various physico-chemical factors affecting bioassay results such as temperature, salinity and total ammonium as well as the sensitivities to contaminants in water and sediments were investigated using M. mai and M. acherusicum in the present study. These amphipods were tolerable to the adequate ranges of salinity ($10{\sim}30\;psu$), temperature ($10{\sim}25^{\circ}C$) and ammonia (<50 ppm). They have relevant sensitivities to the reference toxicants, dissolved cadmium as well as other metals and organic pollutants, when compared to the standard test species used in other countries. Field-sediment toxicity tests revealed that M. mai would be more sensitive to sediment-associated pollutants than M. acherusicum, while the sensitivity of M. acherusicum was comparable to those of other sediment test species in other countries. Overall results of this first attempt to develop an amphipod sediment toxicity test protocol in Korea indicated that M. mai and M. acherusicum should be applicable in the toxicity assessment of contaminated sediments, following the further evaluation encompassing various ecological and toxicological evaluation and the standardization of test method.

본 논문은 저서 단각류를 이용한 해양생태독성시험법 개발을 위하여 국내에 분포하는 후보종을 이용하여 수행된 일련의 생태독성시험결과를 제시하고, 이에 근거하여 퇴적물 독성시험을 위한 표준 시험종과 방법을 제시하였다. 퇴적물 독성평가를 위한 시험종으로는 저서단각류인 Mandibulophoxus mai, Monocorophium acherusicum 그리고 여러 국내산 단각류를 이용하였다. 시험법 개발 및 표준화를 위한 시험항목으로는 퇴적물 입도, 수온, 염분 및 암모니아에 대한 내성범위를 파악하기 위한 실험과 카드뮴과 같은 중금속이나 PAHs와 같은 유기오염물질에 대한 민감도를 파악하기 위한 실험이 포함되었다. 시험 결과 두 종 모두 여러 환경요인에 대한 적합한 내성과 민감도를 갖고 있어 퇴적물 시험종으로서 활용이 가능한 것으로 나타났다. 최종적으로 이들 저서 단각류의 현장 적용성 평가를 위해서 다양한 오염도를 갖는 현장 퇴적물에서 10일간 노출한 이후 사망독성을 평가하고, 오염정도와 생물반응의 관계성 등을 분석하였다. 두 종을 비교한 결과, 민감도의 측면에서는 M. mai가, 시험생물 공급, 배양, 유지 및 실험수행의 편의성에서는 M. acherusicum이 상대적으로 뛰어난 것으로 나타났다. 하지만, 두 종 모두 10일간의 퇴적물 사망 독성시험의 시험종으로서 충분한 적합성을 갖고 있는 것으로 판단할 수 있다. 본 연구결과는 향후 단각류를 이용한 퇴적물 공정시험법의 작성에 활용될 수 있을 것으로 판단된다.

Keywords

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