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Effects of silver nanoparticles on survival, biomass change and avoidance behaviour of the endogeic earthworm Allolobophora chlorotica.
Ecotoxicol Environ Saf. 2017 Jul; 141:64-69.EE

Abstract

Increasing commercial application of silver nanoparticles (Ag NP) and subsequent presence in wastewater and sewage sludge has raised concerns regarding their effects in the aquatic and terrestrial environment. Several studies have employed standardised acute and chronic earthworm-based tests to establish the toxicological effects of Ag NP within soil. These studies have relied heavily on the use of epigiec earthworm species which may have limited ecological relevance in mineral soil. This study assessed the influence of Ag NP (uncoated 80nm powder) and AgNO3 on survival, change in biomass and avoidance behaviour in a soil dwelling (endogiec) species, Allolobophora chlorotica. Earthworms were exposed for 14 days to soils spiked with Ag NP or AgNO3 at 0, 12.5, 25, 50 and 100mgkg-1 either separately for survival and biomass measurement, or combined within a linear gradient to assess avoidance. Avoidance behaviour was shown to provide the most sensitive endpoint with an observable effect at an Ag NP/AgNO3 concentration of 12.5mgkg-1 compared with 50mgkg-1 for biomass change and 100mgkg-1 for survival. Greater mortality was observed in AgNO3 (66.7%) compared with Ag NP-spiked soils (12.5%) at 100mgkg-1, attributed to increased presence of silver ions. Although comparison of results with studies employing Eisenia fetida and Eisenia andrei suggest that the A. chlorotica response to Ag NP is more sensitive, further research employing both epigeic and endogeic earthworms under similar experimental conditions is required to confirm this observation.

Authors+Show Affiliations

School of Forensic and Applied Sciences, University of Central Lancashire, Preston PR1 2HE, United Kingdom. Electronic address: claire@brami.fr.School of Forensic and Applied Sciences, University of Central Lancashire, Preston PR1 2HE, United Kingdom. Electronic address: arglover@uclan.ac.uk.School of Forensic and Applied Sciences, University of Central Lancashire, Preston PR1 2HE, United Kingdom. Electronic address: krbutt@uclan.ac.uk.School of Forensic and Applied Sciences, University of Central Lancashire, Preston PR1 2HE, United Kingdom. Electronic address: cnlowe@uclan.ac.uk.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28319860

Citation

Brami, C, et al. "Effects of Silver Nanoparticles On Survival, Biomass Change and Avoidance Behaviour of the Endogeic Earthworm Allolobophora Chlorotica." Ecotoxicology and Environmental Safety, vol. 141, 2017, pp. 64-69.
Brami C, Glover AR, Butt KR, et al. Effects of silver nanoparticles on survival, biomass change and avoidance behaviour of the endogeic earthworm Allolobophora chlorotica. Ecotoxicol Environ Saf. 2017;141:64-69.
Brami, C., Glover, A. R., Butt, K. R., & Lowe, C. N. (2017). Effects of silver nanoparticles on survival, biomass change and avoidance behaviour of the endogeic earthworm Allolobophora chlorotica. Ecotoxicology and Environmental Safety, 141, 64-69. https://doi.org/10.1016/j.ecoenv.2017.03.015
Brami C, et al. Effects of Silver Nanoparticles On Survival, Biomass Change and Avoidance Behaviour of the Endogeic Earthworm Allolobophora Chlorotica. Ecotoxicol Environ Saf. 2017;141:64-69. PubMed PMID: 28319860.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of silver nanoparticles on survival, biomass change and avoidance behaviour of the endogeic earthworm Allolobophora chlorotica. AU - Brami,C, AU - Glover,A R, AU - Butt,K R, AU - Lowe,C N, Y1 - 2017/03/19/ PY - 2016/11/10/received PY - 2017/03/07/revised PY - 2017/03/10/accepted PY - 2017/3/21/pubmed PY - 2017/7/25/medline PY - 2017/3/21/entrez KW - Allolobophora chlorotica KW - Avoidance behaviour KW - Ecotoxicology KW - Linear gradient KW - Silver nanoparticles SP - 64 EP - 69 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 141 N2 - Increasing commercial application of silver nanoparticles (Ag NP) and subsequent presence in wastewater and sewage sludge has raised concerns regarding their effects in the aquatic and terrestrial environment. Several studies have employed standardised acute and chronic earthworm-based tests to establish the toxicological effects of Ag NP within soil. These studies have relied heavily on the use of epigiec earthworm species which may have limited ecological relevance in mineral soil. This study assessed the influence of Ag NP (uncoated 80nm powder) and AgNO3 on survival, change in biomass and avoidance behaviour in a soil dwelling (endogiec) species, Allolobophora chlorotica. Earthworms were exposed for 14 days to soils spiked with Ag NP or AgNO3 at 0, 12.5, 25, 50 and 100mgkg-1 either separately for survival and biomass measurement, or combined within a linear gradient to assess avoidance. Avoidance behaviour was shown to provide the most sensitive endpoint with an observable effect at an Ag NP/AgNO3 concentration of 12.5mgkg-1 compared with 50mgkg-1 for biomass change and 100mgkg-1 for survival. Greater mortality was observed in AgNO3 (66.7%) compared with Ag NP-spiked soils (12.5%) at 100mgkg-1, attributed to increased presence of silver ions. Although comparison of results with studies employing Eisenia fetida and Eisenia andrei suggest that the A. chlorotica response to Ag NP is more sensitive, further research employing both epigeic and endogeic earthworms under similar experimental conditions is required to confirm this observation. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/28319860/Effects_of_silver_nanoparticles_on_survival_biomass_change_and_avoidance_behaviour_of_the_endogeic_earthworm_Allolobophora_chlorotica_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0147-6513(17)30148-3 DB - PRIME DP - Unbound Medicine ER -