Impacts of a novel controlled-release TiO 2 -coated (nano-) formulation of carbendazim and its constituents on freshwater macroinvertebrate communities.

Autor: Nederstigt TAP; Institute of Environmental Sciences, University of Leiden, Leiden, the Netherlands. Electronic address: t.a.p.nederstigt@cml.leidenuniv.nl., Peijnenburg WJGM; Institute of Environmental Sciences, University of Leiden, Leiden, the Netherlands; National Institute for Public Health and the Environment, Bilthoven, the Netherlands., Schrama M; Institute of Environmental Sciences, University of Leiden, Leiden, the Netherlands., van Ommen JR; Department of Chemical Engineering, TU Delft Process & Product Technology Institute, Delft University of Technology, Delft, the Netherlands., Vijver MG; Institute of Environmental Sciences, University of Leiden, Leiden, the Netherlands.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2022 Sep 10; Vol. 838 (Pt 4), pp. 156554. Date of Electronic Publication: 2022 Jun 09.
DOI: 10.1016/j.scitotenv.2022.156554
Abstrakt: Recently, the delivery of pesticides through novel controlled-release (nano-)formulations has been proposed intending to reduce (incidental) pesticide translocation to non-target sites. Concerns have however been raised with regards to the potentially enhanced toxicity of controlled-release (nano-)formulations to non-target organisms and ecosystems. We evaluated long-term (i.e. 1 and 3 month-) impacts of a novel controlled-release pesticide formulation (nano-TiO 2 -coated carbendazim) and its individual and combined constituents (i.e. nano-sized TiO 2 and carbendazim) on naturally established freshwater macroinvertebrate communities. In doing so, we simultaneously assessed impacts of nano-sized TiO 2 (nTiO 2 ), currently one of the most used and emitted engineered nanomaterials world-wide. We determined ecological impacts on diversity (i.e. β-diversity), structure (i.e. rank abundance parameters), and functional composition (i.e. feeding guilds & trophic groups) of communities and underlying effects at lower organizational levels (i.e. population dynamics of individual taxa). Freshwater macroinvertebrate communities were negligibly impacted by nTiO 2 at environmentally realistic concentrations. The controlled-release (nano-)formulation significantly delayed release of carbendazim to the water column. Nevertheless, conventional- (i.e. un-coated-) and nTiO 2 -coated carbendazim induced a similar set of adverse impacts at all investigated levels of ecological organization and time points. Our findings show fundamental restructuring of the taxonomic- and functional composition of macroinvertebrate communities as a result of low-level pesticide exposure, and thereby highlight the need for mitigating measures to reduce pesticide-induced stress on freshwater ecosystems.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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