Journal article
Effects of aqueous stable fullerene nanocrystals (nC(60)) on Daphnia magna: Evaluation of sub-lethal reproductive responses and accumulation
Chemosphere (Oxford), v 77(11), pp 1482-1487
01 Dec 2009
PMID: 19897225
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Abstract
Concerns exist regarding the inadvertent release of engineered nanomaterials into natural systems, and the possible negative ecosystem response that may occur. Understanding sub-lethal effects may be particularly important to determining ecosystem responses as current levels of nanomaterial release are low compared to levels projected for the future. in this work, the sub-lethal effects and bioaccumulation of water stable, nanocrystalline fullerenes as C-60, (termed nC(60)) were studied in Daphnia magna, a globally distributed, parthenogenetic zooplankton. Sub-lethal concentrations were first determined for both mature mother (LD50 = 0.4 mg L-1) and neonate (gestating) daphnids (0.2 mg L-1) in standard 48 h exposure tests. Subsequent experiments focused on the accumulation and effects (at temperatures of 18-28 degrees C) of nC(60), during the D. magna reproductive cycle. The results demonstrate that upon sub-lethal exposure, the mortality rates of gestating daphnids increased with time and developmental stage. The maturation of daughter daphnids was negatively impacted. The mother daphnids were unable to reproduce again after exposure during pregnancy, and differential bioaccumulation occurred as a function of lipid content in the daphnia with the highest accumulation level of 7000 mg kg(-1) wet weight. Taken together, these results not only describe the accumulation and sub-lethal effects of nC(60) on exposed daphnia, but also highlight the importance of sub-lethal exposure scenarios, which are critical to fully understanding the potential impact of fullerenes and other engineered nanoscale materials on natural systems. (C) 2009 Elsevier Ltd. All rights reserved.
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Details
- Title
- Effects of aqueous stable fullerene nanocrystals (nC(60)) on Daphnia magna: Evaluation of sub-lethal reproductive responses and accumulation
- Creators
- Xianji Tao - Shanghai Jiao Tong UniversityJohn D. Fortner - Rice UniversityBo Zhang - Georgia Institute of TechnologyYihang He - Shanghai Jiao Tong UniversityYongsheng Chen - Georgia Institute of TechnologyJoseph B. Hughes - Georgia Institute of Technology
- Publication Details
- Chemosphere (Oxford), v 77(11), pp 1482-1487
- Publisher
- Elsevier
- Number of pages
- 6
- Grant note
- China Scholarship Council (CSC); China Scholarship Council Center for Biological and Environmental Nanotechnology (CBEN)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:000272598700004
- Scopus ID
- 2-s2.0-71749104652
- Other Identifier
- 991021931902504721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Environmental Sciences