Environmental impacts of suspended solids (SS) released in coastal area by dredging, reclamation and construction can cause serious damages to coastal habitats and benthic organisms. Acute toxicity tests (4-7 days) were conducted to identify the relationship between SS concentration and mortality of three marine benthic species; benthic copepod (Tigriopus japonicus) adult, Pacific abalone (Haliotis discus hannai) spat, and olive flounder (Paralichthys olivaceus) fry. Benthic copepod was the most sensitive to SS followed by olive flounder fry and Pacific abalone spat, with an LC50 (lethal concentration of 50% mortality) value of 61.0 mg/L and LOEC (lowest observed effective concentration) value of 31.3 mg/L for benthic copepod. LOEC and 7 day-LC50 for Pacific abalone spat were 500.0 mg/L and 1887.7 mg/L, and those for olive flounder fry were 125.0 mg/L and 156.9 mg/L, respectively. The tolerance limits of the test species to SS revealed the various concentration ranges of SS, which reflects the physiology and ecology of the test species. These results are very valuable for the determination of SS concentration of effluents released into the coastal area by dredging, reclamation and construction etc. Also, sharp increase of SS can cause long-term damages to the benthic and sessile fauna by blanketing of benthic substratum. These experimental procedures for marine bioassay and acute toxicity results can be a useful guideline for practical management planning of SS discharge into coastal area.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 저서성 요각류 성체 부유물질 노출실험
  2.2. 참전복 치패 부유물질 노출실험
  2.3. 넙치 치어 부유물질 노출실험
  2.4. 통계처리
 3. 결과 및 고찰
  3.1. 부유물질 노출에 따른 저서성 요각류 성체의 사망률변화
  3.2. 부유물질 노출에 따른 참전복 치패의 사망률 변화
  3.3. 부유물질 노출에 따른 넙치 치어의 사망률 변화
 4. 결 론
 참 고 문 헌

• 윤성진(안양대학교 해양생명공학과) | Sung Jin Yoon (Department of Marine Biotechnology, Anyang University)
• 박경수(안양대학교 해양생명공학과) | Gyung Soo Park (Department of Marine Biotechnology, Anyang University) Corresponding Author