Assessing combined impacts of agrochemicals: Aquatic macroinvertebrate population responses in outdoor mesocosms

TY - JOUR

T1 - Assessing combined impacts of agrochemicals: Aquatic macroinvertebrate population responses in outdoor mesocosms

AU - Barmentlo, S. H.

AU - Schrama, M.

AU - Hunting, E. R.

AU - Heutink, R.

AU - van Bodegom, P. M.

AU - de Snoo, G. R.

AU - Vijver, M. G.

N1 - ISI Document Delivery No.: GG1UC Times Cited: 5 Cited Reference Count: 40 Barmentlo, S. Henrik Schrama, Maarten Hunting, Ellard R. Heutink, Roel van Bodegom, Peter M. de Snoo, Geert R. Vijver, Martina G. van Bodegom, Peter/N-8150-2015 van Bodegom, Peter/0000-0003-0771-4500; Barmentlo, Henrik/0000-0001-5279-3047; Vijver, Martina/0000-0003-2999-1605 NWO-ASPASIANetherlands Organization for Scientific Research (NWO) [015.009.009]; NWO-VIDINetherlands Organization for Scientific Research (NWO) [864.13.010] Snails from the breeding facility of Vrije Universiteit Amsterdam (Amsterdam, The Netherlands) were kindly provided by Dr. J.M. Koene of the Department of Ecological Science. Determination of imidacloprid concentrations was performed by Laura Buijse from Wageningen Environmental Research. We like to thank Rody Blom, Arjen van Putten and Erik Gertenaar for practical assistance and colleagues of the conservation biology department of Leiden University for their help with collecting the data. S. Henrik Barmentlo, Ellard R. Hunting and Martina G. Vijver were funded by NWO-ASPASIA 015.009.009 and NWO-VIDI 864.13.010 granted to Martina G. Vijver. 5 4 40 Elsevier science bv Amsterdam 1879-1026 <Go to ISI>://WOS:000432471900037

PY - 2018

Y1 - 2018

N2 - Agricultural ditches host a diverse community of species. These species often are unwarrantedly exposed to fertilizers and a wide-array of pesticides (hereafter: agrochemicals). Standardized ecotoxicological research provides valuable information to predict whether these pesticides possibly pose a threat to the organisms living within these ditches, in particular macro-invertebrates. However, knowledge on how mixtures of these agrochemicals affect macro-invertebrates under realistic abiotic conditions and with population and community complexity is mostly lacking. Therefore we examined here, using a full factorial design, the population responses of macroinvertebrate species assemblages exposed to environmentally relevant concentrations of three commonly used agrochemicals (for 35 days) in an outdoor experiment. The agrochemicals selected were an insecticide (imidacloprid), herbicide (terbuthylazine) and nutrients (NPK), all having a widespread usage and often detected together in watersheds. Effects on species abundance and body length caused by binary mixture combinations could be described from single substance exposure. However, when agrochemicals were applied as terDaly mixtures, as they are commonly found in agricultural waters, species' abundance often deviated from expectations made based on the three single treatments. This indicates that pesticide-mixture induced toxicity to population relevant endpoints are difficult to extrapolate to field conditions. As in agricultural ditches often a multitude (approx. up to 7) of agrochemicals residues are detected, we call other scientist to verify the ecological complexity of non-additive induced shifts in natural aquatic invertebrate populations and aquatic species assemblages. (C) 2018 Elsevier B.V. All rights reserved.

AB - Agricultural ditches host a diverse community of species. These species often are unwarrantedly exposed to fertilizers and a wide-array of pesticides (hereafter: agrochemicals). Standardized ecotoxicological research provides valuable information to predict whether these pesticides possibly pose a threat to the organisms living within these ditches, in particular macro-invertebrates. However, knowledge on how mixtures of these agrochemicals affect macro-invertebrates under realistic abiotic conditions and with population and community complexity is mostly lacking. Therefore we examined here, using a full factorial design, the population responses of macroinvertebrate species assemblages exposed to environmentally relevant concentrations of three commonly used agrochemicals (for 35 days) in an outdoor experiment. The agrochemicals selected were an insecticide (imidacloprid), herbicide (terbuthylazine) and nutrients (NPK), all having a widespread usage and often detected together in watersheds. Effects on species abundance and body length caused by binary mixture combinations could be described from single substance exposure. However, when agrochemicals were applied as terDaly mixtures, as they are commonly found in agricultural waters, species' abundance often deviated from expectations made based on the three single treatments. This indicates that pesticide-mixture induced toxicity to population relevant endpoints are difficult to extrapolate to field conditions. As in agricultural ditches often a multitude (approx. up to 7) of agrochemicals residues are detected, we call other scientist to verify the ecological complexity of non-additive induced shifts in natural aquatic invertebrate populations and aquatic species assemblages. (C) 2018 Elsevier B.V. All rights reserved.

KW - Agrochemicals Mixtures Outdoor testing Aquatic invertebrates Mesocosm chronic toxicity daphnia-magna mayfly nymphs pesticides ecotoxicology biodiversity herbicides stressors mixtures ecology Environmental Sciences & Ecology

U2 - 10.1016/j.scitotenv.2018.03.021

DO - 10.1016/j.scitotenv.2018.03.021

M3 - Article

SN - 0048-9697

VL - 631-632

SP - 341

EP - 347

JO - Science of the Total Environment

JF - Science of the Total Environment

ER -