화학물질에 대한 독성시험 bi-trophic microcosm 구축에 있어 표준시험생물 녹조류(Pseudokirchneriella subcapitata)와 물벼룩(Daphnia magna)의 개체군 특성 연구 (Construction of a Simple Bi-trophic Microcosm System Using Standard Test Species (Pseudokirchneriella subcapitata and Daphnia magna) for Testing Chemical Toxicities.)

서지정보

· 발행기관 : 한국수생태학회
· 수록지 정보 : 생태와 환경 / 49권 / 3호 / 228 ~ 235페이지
· 저자명 : 사카모토마사키, 마노히로유키, 하나자토타카유키, 장광현

초록

Aquatic ecosystems are receiving various harmful effects due to anthropogenic chemical pollutions.
To protect wildlife, risk assessments of the chemicals are conducted using reference indexes of toxicity estimated by species-level laboratory tests and/or micro-/mesocosm community-level studies. However, the existing micro-/mesocosm communities are structurally too complicated, and it is also difficult to compare the experimental results directly with those from species-level tests. Here, we developed a procedure of a simple bi-trophic microcosm experiment which contains the common species (a green algae, Pseudokirchneriella subcapitata and a cladoceran, Daphnia magna) for testing chemical toxicities. For the proper operation of bitrophic microcosm experiment, the minimum required concentration of primary producer (P. subcapitata) is 5×105 cells mL-1. The microcosm system showed higher stability when the initially introduced D. magna population was composed of neonates (<24-h old) than adults and those mixture. This simple microcosm system would be an applicable tool to estimate the disturbing impacts of pollutants on plant-herbivore interactions, and linking the species- and population-/community level risk assessments in the future studies.

영어초록

Aquatic ecosystems are receiving various harmful effects due to anthropogenic chemical pollutions.
To protect wildlife, risk assessments of the chemicals are conducted using reference indexes of toxicity estimated by species-level laboratory tests and/or micro-/mesocosm community-level studies. However, the existing micro-/mesocosm communities are structurally too complicated, and it is also difficult to compare the experimental results directly with those from species-level tests. Here, we developed a procedure of a simple bi-trophic microcosm experiment which contains the common species (a green algae, Pseudokirchneriella subcapitata and a cladoceran, Daphnia magna) for testing chemical toxicities. For the proper operation of bitrophic microcosm experiment, the minimum required concentration of primary producer (P. subcapitata) is 5×105 cells mL-1. The microcosm system showed higher stability when the initially introduced D. magna population was composed of neonates (<24-h old) than adults and those mixture. This simple microcosm system would be an applicable tool to estimate the disturbing impacts of pollutants on plant-herbivore interactions, and linking the species- and population-/community level risk assessments in the future studies.

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