Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Assessment of the impact of suspended solids on the survival of marine invertebrates

부유물질이 해산무척추동물 생존에 미치는 영향평가

  • Jin-Hyeok Park (Ulleungdo-Docdo Ocean Science Station, Korea Institute of Ocean Science & Technology) ;
  • Sung Jin Yoon (Ulleungdo-Docdo Ocean Science Station, Korea Institute of Ocean Science & Technology)
  • 박진혁 (한국해양과학기술원 울릉도.독도해양연구기지) ;
  • 윤성진 (한국해양과학기술원 울릉도.독도해양연구기지)
  • Received : 2022.06.16
  • Accepted : 2022.09.05
  • Published : 2022.09.30
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Abstract

Suspended solids play an important role in the growth and survival of aquatic organisms. The marine zooplankton species tested in this study were Tigriopus west (Copepoda) and Haustorioides koreanus (Amphipoda) sampled from the intertidal zone, including Artemia nauplii(Branchiopoda) hatched from cysts. The study design included six concentrations (0, 50, 100, 250, 500, and 1,000mg L-1) of the suspended test particles assayed in triplicate. Experimental cultures in 500 mL-round polycarbonate bottles were subsampled after 96 h to count dead zooplankton. The culture bottles were agitated at 4 RPM on a rotating wheel at 23℃ and 30 PSU. The survival rates of Artemia nauplii and T. west were not affected by suspended solid concentrations higher than 50.0 mg L-1, whereas the survival rate of H. koreanus decreased with increasing concentrations (p<0.05). In conclusion, H. koreanus and T. west, which were continuously exposed to suspended solid concentrations higher than 50.0 mg L-1, were affected by low-intensity ecological stress. However, in the case of H. koreanus, a concentration of 50.0 mg L-1 may be considered to be the limit of tolerance to suspended solids, suggesting that the number of individuals who eventually die will increase if continuously exposed.

부유물질은 수생생물의 성장과 생존에 중요한 역할을 한다. 본 논문은 cyst에서 부화한 Artemia 유생(branchiopoda), 조간대에서 채집한 T. west (copepod)와 H. koreanus (amphipoda)를 사용하여 96시간 동안 부유물질에 노출된 생물의 생존 영향을 규명하였다. 실험 결과 Artemia 유생과 T. west의 생존율은 50.0mg L-1 이상의 부유물질 농도에 영향을 받지 않으나 H. koreanus는 부유물질 농도가 증가함에 따라 낮은 생존율을 보였다(p<0.05). 결론적으로 50.0mg L-1 이상의 부유물질에 지속적으로 노출된 Artemia 유생과 T. west는 미세한 생태 스트레스의 영향을 받지만 H. koreanus는 생존 가능한 내성범위를 벗어나 사망한 개체가 증가할 것으로 판단된다.

Keywords

Acknowledgement

본 논문은 한국해양과학기술원 기관목적사업 (PEA0016)의 연구비 지원으로 수행하였습니다.

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