title: Trophic transfer of gold nanoparticles from Euglena gracilis or Chlamydomonas reinhardtii to Daphnia magna.
abstract: Understanding the trophic transfer of nanoparticles (NPs) is important because NPs are small enough to easily penetrate into organisms. In this study, we evaluated the trophic transfer of gold NPs (AuNPs) within the aquatic food chain. We observed AuNPs transfer from 2 species of primary producers (Chlamydomonas reinhardtii or Euglena gracilis) to the primary consumer (Daphnia magna). Also, bioaccumulation of AuNPs in E. gracilis was higher than that in C. reinhardtii. The reasons for the difference in Au accumulation may be the physical structure of these organisms, and the surface area that is available for interaction with NPs. C. reinhardtii has a cell wall that may act as a barrier to the penetration of NPs. The size of E. gracilis is larger than that of C. reinhardtii. This study demonstrates the trophic transfer of AuNPs from a general producer to a consumer in an aquatic environment.
authors.affiliation: Department of Environmental Health Science, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 143-701, Republic of Korea.
authors.forename: Woo-Mi
authors.initials: WM
authors.lastname: Lee
authors.affiliation: Department of Environmental Health Science, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 143-701, Republic of Korea.
authors.forename: Sung-Ji
authors.initials: SJ
authors.lastname: Yoon
authors.affiliation: Department of Environmental Health Science, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 143-701, Republic of Korea.
authors.forename: Yu-Jin
authors.initials: YJ
authors.lastname: Shin
authors.affiliation: Department of Environmental Health Science, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 143-701, Republic of Korea. Electronic address: anyjoo@konkuk.ac.kr.
authors.forename: Youn-Joo
authors.initials: YJ
authors.lastname: An
mesh_terms: D000818:Animals; D016825:Chlamydomonas reinhardtii / Q000737:chemistry*; D003621:Daphnia / Q000737:chemistry*; D005056:Euglena gracilis / Q000737:chemistry*; D020387:Food Chain; D006046:Gold / Q000032:analysis*; D053758:Nanoparticles / Q000032:analysis*
chemical_list: D006046:Gold
keywords: Chlamydomonas reinhardtii; Daphnia magna; Euglena gracilis; Gold nanoparticles (AuNPs); Trophic transfer