An Ecological Perspective on Nanomaterial Impacts in the Environment

Bernhardt, Emily S.; Colman, Benjamin P.; Hochella, Michael F.; Cardinale, Bradley J.; Nisbet, Roger M.; Richardson, Curtis J.; Yin, Liyan

doi:10.2134/jeq2009.0479

Cited by 176 publications

(112 citation statements)

References 90 publications

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“…MNPs may also indirectly affect soil bacteria by changing nutrient availability or other physical properties of the soil due to their large surface area and high reactivity (Bernhardt et al, 2010;Ben-Moshe et al, 2013). Although there is no empirical data of nutrient availability in the soils with amendment of MNPs in this study, the varying levels of the stress ratios could be related to nutrient stress.…”

Section: Elementmentioning

confidence: 85%

Distinctive effects of TiO 2 and CuO nanoparticles on soil microbes and their community structures in flooded paddy soil

Peng

Sun

et al. 2015

Soil Biology and Biochemistry

201

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Section: Elementmentioning

confidence: 85%

Distinctive effects of TiO 2 and CuO nanoparticles on soil microbes and their community structures in flooded paddy soil

Peng

Sun

et al. 2015

Soil Biology and Biochemistry

201

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“…The potential mechanism could be the direct toxicity of ENPs on soil bacteria through the release of metal ions or attachment-related cell damage (5,10,23,28,44). ENPs may also indirectly affect soil bacteria by changing nutrient availability or the bioavailability of cooccurring contaminants and by changing physical properties of the soil due to their large surface area and high reactivity (4,25). Further research is needed to partition the relative importance of different factors in influencing soil microbial communities.…”

Section: Do Enps Affect Soil Bacterial Communities?mentioning

confidence: 99%

Identification of Soil Bacteria Susceptible to TiO ₂ and ZnO Nanoparticles

Schimel

Holden

2012

Appl Environ Microbiol

233

124

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ABSTRACTBecause soil is expected to be a major sink for engineered nanoparticles (ENPs) released to the environment, the effects of ENPs on soil processes and the organisms that carry them out should be understood. DNA-based fingerprinting analyses have shown that ENPs alter soil bacterial communities, but specific taxon changes remain unknown. We used bar-coded pyrosequencing to explore the responses of diverse bacterial taxa to two widely used ENPs, nano-TiO2and nano-ZnO, at various doses (0, 0.5, 1.0, and 2.0 mg g−1soil for TiO2; 0.05, 0.1, and 0.5 mg g−1soil for ZnO) in incubated soil microcosms. These ENPs significantly altered the bacterial communities in a dose-dependent manner, with some taxa increasing as a proportion of the community, but more taxa decreasing, indicating that effects mostly reduced diversity. Some of the declining taxa are known to be associated with nitrogen fixation (Rhizobiales,Bradyrhizobiaceae, andBradyrhizobium) and methane oxidation (Methylobacteriaceae), while some positively impacted taxa are known to be associated with the decomposition of recalcitrant organic pollutants (Sphingomonadaceae) and biopolymers including protein (StreptomycetaceaeandStreptomyces), indicating potential consequences to ecosystem-scale processes. The latter was suggested by a positive correlation between protease activity and the relative abundance ofStreptomycetaceae(R= 0.49,P= 0.000) andStreptomyces(R= 0.47,P= 0.000). Our results demonstrate that some metal oxide nanoparticles could affect soil bacterial communities and associated processes through effects on susceptible, narrow-function bacterial taxa.

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“…Aquatic organisms are regularly exposed to natural mineral particles (“NMPs”) in the low µm to nm size-range [19], [20], i.e. sizes comparable to engineered nanoparticles (“ENPs”; [21], [22]).…”

Section: Introductionmentioning

confidence: 99%

Natural Mineral Particles Are Cytotoxic to Rainbow Trout Gill Epithelial Cells In Vitro

et al. 2014

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Worldwide increases in fluvial fine sediment are a threat to aquatic animal health. Fluvial fine sediment is always a mixture of particles whose mineralogical composition differs depending on the sediment source and catchment area geology. Nonetheless, whether particle impact in aquatic organisms differs between mineral species remains to be investigated. This study applied an in vitro approach to evaluate cytotoxicity and uptake of four common fluvial mineral particles (quartz, feldspar, mica, and kaolin; concentrations: 10, 50, 250 mg L−1) in the rainbow trout epithelial gill cell line RTgill-W1. Cells were exposed for 24, 48, 72, and 96 h. Cytotoxicity assays for cell membrane integrity (propidium iodide assay), oxidative stress (H2DCF-DA assay), and metabolic activity (MTT assay) were applied. These assays were complemented with cell counts and transmission electron microscopy. Regardless of mineral species, particles ≤2 µm in diameter were taken up by the cells, suggesting that particles of all mineral species came into contact and interacted with the cells. Not all particles, however, caused strong cytotoxicity: Among all assays the tectosilicates quartz and feldspar caused sporadic maximum changes of 0.8–1.2-fold compared to controls. In contrast, cytotoxicity of the clay particles was distinctly stronger and even differed between the two particle types: mica induced concentration-dependent increases in free radicals, with consistent 1.6–1.8-fold-changes at the 250 mg L−1 concentration, and a dilated endoplasmic reticulum. Kaolin caused concentration-dependent increases in cell membrane damage, with consistent 1.3–1.6-fold increases at the 250 mg L−1 concentration. All effects occurred in the presence or absence of 10% fetal bovine serum. Cell numbers per se were marginally affected. Results indicate that (i.) natural mineral particles can be cytotoxic to gill epithelial cells, (ii.) their cytotoxic potential differs between mineral species, with clay particles being more cytotoxic, and (iii.) some clays might induce effects comparable to engineered nanoparticles.

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An Ecological Perspective on Nanomaterial Impacts in the Environment

Cited by 176 publications

References 90 publications

Distinctive effects of TiO 2 and CuO nanoparticles on soil microbes and their community structures in flooded paddy soil

Distinctive effects of TiO 2 and CuO nanoparticles on soil microbes and their community structures in flooded paddy soil

Identification of Soil Bacteria Susceptible to TiO ₂ and ZnO Nanoparticles

Natural Mineral Particles Are Cytotoxic to Rainbow Trout Gill Epithelial Cells In Vitro

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An Ecological Perspective on Nanomaterial Impacts in the Environment

Cited by 176 publications

References 90 publications

Distinctive effects of TiO 2 and CuO nanoparticles on soil microbes and their community structures in flooded paddy soil

Distinctive effects of TiO 2 and CuO nanoparticles on soil microbes and their community structures in flooded paddy soil

Identification of Soil Bacteria Susceptible to TiO 2 and ZnO Nanoparticles

Natural Mineral Particles Are Cytotoxic to Rainbow Trout Gill Epithelial Cells In Vitro

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Product

Resources

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Identification of Soil Bacteria Susceptible to TiO ₂ and ZnO Nanoparticles