Sammanfattning

Interactions with environmental parameters may alter the ecotoxicity of nanoparticles. The present study therefore assessed the (in)direct effects of nanoparticulate titanium dioxide (nano-TiO2) towards Gammarus fossarum, considering nano-TiO2's photocatalytic properties at ambient UV-intensities. Gammarids' habitat selection was investigated using its feeding preference on leaf discs either exposed to or protected from UV-irradiation in presence of nano-TiO2 as proxy (n = 49). UV-irradiation alone induced a significant preference for UV-protected habitats, which was more pronounced in simultaneous presence of nano-TiO2. This behaviour may be mainly explained by the UV-induced formation of reactive oxygen species (ROS) by nano-TiO2. Besides their direct toxicity, ROS may have lowered the leaf-quality in UV-exposed areas contributing (approximately 30%) to the observed behavioural pattern. Since the predicted no effect concentration of nano-TiO2 in combination with UVirradiation falls below the predicted environmental concentration this study underpins the importance of considering environmental parameters during the risk assessment of nanoparticles. (C) 2014 Elsevier Ltd. All rights reserved.

Nyckelord

Gammarus; UV-irradiation; Interaction effect; Reactive oxygen species; Behavioural response

Publicerad i

Environmental Pollution
2015, Volym: 196, sidor: 276-283
Utgivare: ELSEVIER SCI LTD

SLU författare

• Feckler, Alexander

  • Institutionen för vatten och miljö, Sveriges lantbruksuniversitet
    
  • Universität Koblenz-Landau

• Bundschuh, Mirco

  • Institutionen för vatten och miljö, Sveriges lantbruksuniversitet
    
  • Universität Koblenz-Landau

Globala målen

SDG6 Säkerställa tillgången till och en hållbar förvaltning av vatten och sanitet för alla


UKÄ forskningsämne

Ekologi


Publikationens identifierare

DOI: https://doi.org/10.1016/j.envpol.2014.09.022

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/68257