Effects of Amorphous Silica Nanopowders on the Avoidance Behavior of Five Soil Species-A Screening Study
authors Santos, J; Barreto, A; Nogueira, J; Daniel-da-Silva, AL; Trindade, T; Amorim, MJB; Maria, VL
nationality International
journal NANOMATERIALS
author keywords engineered nanomaterials; nanosilica; terrestrial invertebrates; avoidance assay; ecotoxicology
keywords ENCHYTRAEUS-ALBIDUS; FOLSOMIA-CANDIDA; TOXICITY ASSESSMENT; EXPOSURE TIME; NANOPARTICLES; TESTS; REPRODUCTION; ECOTOXICITY; TOXICOLOGY; LARVAE
abstract Silica nanoparticles (SiO(2)NPs) are one of the most used in commercial products and biomedical tools, however, their environmental effects have not been fully described. Although negative effects of SiO(2)NPs on the behavior of freshwater invertebrates have been reported, the knowledge is limited, especially the effect of nanopowders in terrestrial organisms. Accordingly, the aim of the present study is to understand the effects of SiO(2)NPs on the avoidance behavior of five soil species, whose niche may differ thus contributing to differential harmful SiO(2)NPs effects. Hence, avoidance assays testing SiO(2)NPs concentrations of 0, 10, 100, 250, 500 and 1000 mg/kg were performed with Enchytraeus crypticus, Folsomia candida, Tenebrio molitor, Porcellionides pruinosus and Eisenia fetida. SiO(2)NPs induced different behavioral effects, depending on the invertebrate ecology/habitat, exposure route and physiology. T. molitor, P. pruinosus and F. candida did not avoid contaminated soil; however, E. crypticus and E. fetida significantly avoided SiO(2)NPs spiked soil. Since these terrestrial worms (oligochaetes) live mostly burrowed in the soil, this can provide greater opportunity for SiO(2)NPs' uptake. On the other hand, the other tested organisms mainly living on the upper part of the soil did not avoid the SiO(2)NPs spiked soil. The avoidance data obtained here also highlight the need for further studies to understand whether (or not) the detected behavioral responses are linked to either neurotransmission processes or sensorial aspects of the biological models.
publisher MDPI
year published 2020
volume 10
issue 3
digital object identifier (doi) 10.3390/nano10030402
web of science category Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000526090400002
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journal impact factor 4.324
5 year journal impact factor 4.514
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