Collembola Reproduction Decreases with Aging of Silver Nanoparticles in a Sewage Sludge-Treated Soil

McKee, Moira S.; Engelke, Maria; Zhang, Xin; Lesnikov, Elena; Köser, Jan; Eickhorst, Thilo; Filser, Juliane

doi:10.3389/fenvs.2017.00019

Cited by 21 publications

(15 citation statements)

References 45 publications

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“…6 days) reduced NP-induced effects substantially as NP agglomerates exceeded the size range retained by daphnids’ filter apparatus [ 192 ]. Similarly, Collembola ( F. candida ) showed more severe effects in their reproductive output with increasing ageing duration of Ag NP in spiked sewage sludge [ 193 ]. It is suspected that this is due to the continuous release of Ag ions from Ag NP.…”

Section: Interactions Of Nanoparticles In a Complex Environmentmentioning

confidence: 99%

Nanoparticles in the environment: where do we come from, where do we go to?

et al. 2018

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Nanoparticles serve various industrial and domestic purposes which is reflected in their steadily increasing production volume. This economic success comes along with their presence in the environment and the risk of potentially adverse effects in natural systems. Over the last decade, substantial progress regarding the understanding of sources, fate, and effects of nanoparticles has been made. Predictions of environmental concentrations based on modelling approaches could recently be confirmed by measured concentrations in the field. Nonetheless, analytical techniques are, as covered elsewhere, still under development to more efficiently and reliably characterize and quantify nanoparticles, as well as to detect them in complex environmental matrixes. Simultaneously, the effects of nanoparticles on aquatic and terrestrial systems have received increasing attention. While the debate on the relevance of nanoparticle-released metal ions for their toxicity is still ongoing, it is a re-occurring phenomenon that inert nanoparticles are able to interact with biota through physical pathways such as biological surface coating. This among others interferes with the growth and behaviour of exposed organisms. Moreover, co-occurring contaminants interact with nanoparticles. There is multiple evidence suggesting nanoparticles as a sink for organic and inorganic co-contaminants. On the other hand, in the presence of nanoparticles, repeatedly an elevated effect on the test species induced by the co-contaminants has been reported. In this paper, we highlight recent achievements in the field of nano-ecotoxicology in both aquatic and terrestrial systems but also refer to substantial gaps that require further attention in the future.

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Section: Interactions Of Nanoparticles In a Complex Environmentmentioning

confidence: 99%

Nanoparticles in the environment: where do we come from, where do we go to?

et al. 2018

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“…Rask and Hiisivuori 1985;Krisp and Maier 2005). While direct toxicity is typically observed at high AgNP concentrations (Zhao and Wang 2011;Topuz and Van Gestel 2015;Baptista et al 2015;Mckee et al 2016), we observed low AgNP-concentration effects on microbial communities to translate to invertebrate growth effects. This calls for further investigations and consideration of trophic interactions assessing hazards and risks of NPs for the environment.…”

Section: Discussionmentioning

confidence: 51%

“…It is likely that waterborne metals adsorb and accumulate in leaves and OM, as observed for CuNP (Pradhan et al 2012), and therewith fuel the dietary toxicity towards invertebrates. Overall, the waterborne concentrations were low and typically do not elicit direct effects (Baptista et al 2015;Mckee et al 2016), however, we cannot rule out the possibility of waterborne Ag ions contributing to the impairments in A. aquaticus growth. Likewise, ingestion of OM containing AgNP may have contributed to growth impairment.…”

Section: Discussionmentioning

confidence: 84%

Microbially-mediated indirect effects of silver nanoparticles on aquatic invertebrates

et al. 2018

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Complex natural systems are affected by multiple anthropogenic stressors, and therefore indirect effects within food webs are increasingly investigated. In this context, dead organic matter (OM) or detritus provides a food source sustaining detrital food webs that recycle the retained energy through microbial decomposition and invertebrate consumption. In aquatic environments, poorly water-soluble contaminants, including nanoparticles (NPs), quickly adsorb onto OM potentially modifying OM-associated microbial communities. Since invertebrates often depend on microbial conditioning to enhance OM quality, adverse effects on OM-associated microbial communities could potentially affect invertebrate performances. Therefore, this study assessed the effect of environmentally relevant concentrations of the model emerging contaminant, silver nanoparticles (AgNPs), on OM-associated microorganisms and subsequent indirect effects on growth of the invertebrate Asellus aquaticus. At low concentrations (0.8 ug/L), AgNPs inhibited activity and altered metabolic diversity of the OM-associated microbial community. This was observed to coincide with a negative effect on the growth of A. aquaticus due to antimicrobial properties, as a decreased growth was observed when offered AgNP-contaminated OM. When A. aquaticus were offered sterile OM in the absence of AgNPs, invertebrate growth was observed to be strongly retarded, illustrating the importance of microorganisms in the diet of this aquatic invertebrate. This outcome thus hints that environmentally relevant concentrations of AgNPs can indirectly affect the growth of aquatic invertebrates by affecting OM-associated microbial communities, and hence that microorganisms are an essential link in understanding bottom-up directed effects of chemical stressors in food webs.

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“…For characterization, we summarize the findings of Klein et al (2011) [ 18 ] and Köser et al (2017) [ 7 ]; for further details, refer to these publications. NM-300K are about 15 nm in size and 99% of the silver particles are below 20 nm [ 18 ].…”

Section: Methodsmentioning

confidence: 99%

“…Currently the environmental concentrations are still very low, for example, 20–350 ng·kg −1 [ 3 ] in Denmark, but are expected to increase. Numerous studies have examined the toxicity of AgNP to soil invertebrates and detected negative effects on reproduction, survival, biomass, and gene expression (e.g., [ 4 , 5 , 6 , 7 , 8 , 9 ]). Species-, particle-, and concentration-dependent effects were found.…”

Section: Introductionmentioning

confidence: 99%

Is a Water Content of 60% Maximum Water Holding Capacity Suitable for Folsomia candida Reproduction Tests? A Study with Silver Nanoparticles and AgNO3

McKee

Guerrero

Filser

2018

IJERPH

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Silver nanoparticles (AgNP) are increasingly emitted to the environment due to a rise in application in various products; therefore, assessment of their potential risks for biota is important. In this study the effects of AgNP at environmentally relevant concentrations (0.6–375 µg kg−1 soil) on the soil invertebrate Folsomia candida in OECD (Organisation for Economic Co-operation and Development) soil was examined at different soil water contents. Animals were retrieved by heat extraction, which had an efficiency of about 90% compared with the floatation method. The tested water content range is set by OECD Guideline 232 (40–60% of the maximum water holding capacity, WHC), and we detected significant differences in toxicity due to these. With AgNO3, used as an ionic control, the number of juveniles significantly decreased only at 40% WHC, which might be due to dilution of the toxicant at higher soil water content. In turn, at 60% WHC, the reproduction of F. candida significantly increased in the presence of AgNP compared with in the control. However, at this water content, the required number of juveniles in the control treatment was not reached in three independent tests. The fact that the OECD validity criterion is not met indicates that the soil conditions are not suitable for reproduction at 60% WHC.

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Collembola Reproduction Decreases with Aging of Silver Nanoparticles in a Sewage Sludge-Treated Soil

Cited by 21 publications

References 45 publications

Nanoparticles in the environment: where do we come from, where do we go to?

Nanoparticles in the environment: where do we come from, where do we go to?

Microbially-mediated indirect effects of silver nanoparticles on aquatic invertebrates

Is a Water Content of 60% Maximum Water Holding Capacity Suitable for Folsomia candida Reproduction Tests? A Study with Silver Nanoparticles and AgNO3

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