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Shahid N, Siddique A, Liess M. Predicting the Combined Effects of Multiple Stressors and Stress Adaptation in Gammarus pulex. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:12899-12908. [PMID: 38984974 PMCID: PMC11270985 DOI: 10.1021/acs.est.4c02014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 06/19/2024] [Accepted: 06/26/2024] [Indexed: 07/11/2024]
Abstract
Global change confronts organisms with multiple stressors causing nonadditive effects. Persistent stress, however, leads to adaptation and related trade-offs. The question arises: How can the resulting effects of these contradictory processes be predicted? Here we show that Gammarus pulex from agricultural streams were more tolerant to clothianidin (mean EC50 148 μg/L) than populations from reference streams (mean EC50 67 μg/L). We assume that this increased tolerance results from a combination of physiological acclimation, epigenetic effects, and genetic evolution, termed as adaptation. Further, joint exposure to pesticide mixture and temperature stress led to synergistic interactions of all three stressors. However, these combined effects were significantly stronger in adapted populations as shown by the model deviation ratio (MDR) of 4, compared to reference populations (MDR = 2.7). The pesticide adaptation reduced the General-Stress capacity of adapted individuals, and the related trade-off process increased vulnerability to combined stress. Overall, synergistic interactions were stronger with increasing total stress and could be well predicted by the stress addition model (SAM). In contrast, traditional models such as concentration addition (CA) and effect addition (EA) substantially underestimated the combined effects. We conclude that several, even very disparate stress factors, including population adaptations to stress, can act synergistically. The strong synergistic potential underscores the critical importance of correctly predicting multiple stresses for risk assessment.
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Affiliation(s)
- Naeem Shahid
- System-Ecotoxicology, Helmholtz Centre for Environmental Research −
UFZ, Permoserstraße 15, 04318 Leipzig, Germany
- Department
of Evolutionary Ecology and Environmental Toxicology, Goethe University Frankfurt, 60629 Frankfurt am Main, Germany
| | - Ayesha Siddique
- System-Ecotoxicology, Helmholtz Centre for Environmental Research −
UFZ, Permoserstraße 15, 04318 Leipzig, Germany
- Institute
for Environmental Research (Biology V), RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
| | - Matthias Liess
- System-Ecotoxicology, Helmholtz Centre for Environmental Research −
UFZ, Permoserstraße 15, 04318 Leipzig, Germany
- Institute
for Environmental Research (Biology V), RWTH Aachen University, Worringerweg 1, 52074 Aachen, Germany
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2
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Ijzerman MM, Raby M, Izma GB, Kudla YM, Letwin NV, Gallant MJ, Schiffer SR, Atkinson BJ, Rooney RC, Sibley PK, Prosser RS. An Assessment of the Toxicity of Pesticide Mixtures in Periphyton from Agricultural Streams to the Mayfly Neocloeon triangulifer. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2023; 42:2143-2157. [PMID: 37341551 DOI: 10.1002/etc.5698] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/05/2023] [Accepted: 06/15/2023] [Indexed: 06/22/2023]
Abstract
Residual concentrations of pesticides are commonly found outside the intended area of application in Ontario's surface waters. Periphyton are a vital dietary component for grazing organisms in aquatic ecosystems but can also accumulate substantial levels of pesticides from the surrounding water. Consequently, grazing aquatic organisms are likely subjected to pesticide exposure through the consumption of pesticide-contaminated periphyton. The objectives of the present study were to determine if pesticides partition into periphyton in riverine environments across southern Ontario and, if so, to determine the toxicity of pesticides in periphyton when fed to the grazing mayfly Neocloeon triangulifer. Sites with low, medium, and high pesticide exposure based on historic water quality monitoring data were selected to incorporate a pesticide exposure gradient into the study design. Artificial substrate samplers were utilized to colonize periphyton in situ, which were then analyzed for the presence of approximately 500 pesticides. The results demonstrate that periphyton are capable of accumulating pesticides in agricultural streams. A novel 7-day toxicity test method was created to investigate the effects of pesticides partitioned into periphyton when fed to N. triangulifer. Periphyton collected from the field sites were fed to N. triangulifer and survival and biomass production recorded. Survival and biomass production significantly decreased when fed periphyton colonized in streams with catchments dominated by agricultural land use (p < 0.05). However, the relationship between pesticide concentration and survival or biomass production was not consistent. Using field-colonized periphyton allowed us to assess the dietary toxicity of environmentally relevant concentrations of pesticide mixtures; however, nutrition and taxonomic composition of the periphyton may vary between sites. Environ Toxicol Chem 2023;42:2143-2157. © 2023 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
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Affiliation(s)
- Moira M Ijzerman
- School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Melanie Raby
- Ontario Ministry of the Environment, Conservation and Parks, Toronto, Ontario, Canada
| | - Gab B Izma
- Department of Biology, University of Waterloo, Waterloo, Ontario, Canada
| | - Yaryna M Kudla
- School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Nicholas V Letwin
- School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
| | | | | | - Brian J Atkinson
- Agriculture and Food Laboratory, University of Guelph, Guelph, Ontario, Canada
| | - Rebecca C Rooney
- Department of Biology, University of Waterloo, Waterloo, Ontario, Canada
| | - Paul K Sibley
- School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Ryan S Prosser
- School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
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3
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Bellot P, Brischoux F, Budzinski H, Dupont SM, Fritsch C, Hope SF, Michaud B, Pallud M, Parenteau C, Prouteau L, Rocchi S, Angelier F. Chronic exposure to tebuconazole alters thyroid hormones and plumage quality in house sparrows (Passer domesticus). ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023:10.1007/s11356-023-28259-5. [PMID: 37365357 DOI: 10.1007/s11356-023-28259-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 06/10/2023] [Indexed: 06/28/2023]
Abstract
Triazoles belong to a family of fungicides that are ubiquitous in agroecosystems due to their widespread use in crops. Despite their efficiency in controlling fungal diseases, triazoles are also suspected to affect non-target vertebrate species through the disruption of key physiological mechanisms. Most studies so far have focused on aquatic animal models, and the potential impact of triazoles on terrestrial vertebrates has been overlooked despite their relevance as sentinel species of contaminated agroecosystems. Here, we examined the impact of tebuconazole on the thyroid endocrine axis, associated phenotypic traits (plumage quality and body condition) and sperm quality in wild-caught house sparrows (Passer domesticus). We experimentally exposed house sparrows to realistic concentrations of tebuconazole under controlled conditions and tested the impact of this exposure on the levels of thyroid hormones (T3 and T4), feather quality (size and density), body condition and sperm morphology. We found that exposure to tebuconazole caused a significant decrease in T4 levels, suggesting that this azole affects the thyroid endocrine axis, although T3 levels did not differ between control and exposed sparrows. Importantly, we also found that exposed females had an altered plumage structure (larger but less dense feathers) relative to control females. The impact of tebuconazole on body condition was dependent on the duration of exposure and the sex of individuals. Finally, we did not show any effect of exposure to tebuconazole on sperm morphology. Our study demonstrates for the first time that exposure to tebuconazole can alter the thyroid axis of wild birds, impact their plumage quality and potentially affect their body condition. Further endocrine and transcriptomic studies are now needed not only to understand the underlying mechanistic effects of tebuconazole on these variables, but also to further investigate their ultimate consequences on performance (i.e. reproduction and survival).
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Affiliation(s)
- Pauline Bellot
- Centre d'Etudes Biologiques de Chizé, UMR 7372, CNRS-La Rochelle Université, 79360, Villiers en Bois, France.
| | - François Brischoux
- Centre d'Etudes Biologiques de Chizé, UMR 7372, CNRS-La Rochelle Université, 79360, Villiers en Bois, France
| | - Hélène Budzinski
- CNRS-EPOC, UMR 5805, LPTC Research Group, University of Bordeaux, 33400, Talence, France
| | - Sophie M Dupont
- BOREA, MNHN, CNRS 8067, SU, IRD 207, UCN, UA, 97233, Schoelcher, Martinique, France
- LIENSs, UMR 7266 CNRS-La Rochelle Université, 2 Rue Olympe de Gouges, 17000, La Rochelle, France
| | - Clémentine Fritsch
- Laboratoire Chrono-Environnement, UMR 6249, CNRS/Université de Franche-Comté, F-25000, Besançon, France
| | - Sydney F Hope
- Centre d'Etudes Biologiques de Chizé, UMR 7372, CNRS-La Rochelle Université, 79360, Villiers en Bois, France
| | - Bruno Michaud
- Centre d'Etudes Biologiques de Chizé, UMR 7372, CNRS-La Rochelle Université, 79360, Villiers en Bois, France
| | - Marie Pallud
- Centre d'Etudes Biologiques de Chizé, UMR 7372, CNRS-La Rochelle Université, 79360, Villiers en Bois, France
| | - Charline Parenteau
- Centre d'Etudes Biologiques de Chizé, UMR 7372, CNRS-La Rochelle Université, 79360, Villiers en Bois, France
| | - Louise Prouteau
- CNRS-EPOC, UMR 5805, LPTC Research Group, University of Bordeaux, 33400, Talence, France
| | - Steffi Rocchi
- Laboratoire Chrono-Environnement, UMR 6249, CNRS/Université de Franche-Comté, F-25000, Besançon, France
| | - Frédéric Angelier
- Centre d'Etudes Biologiques de Chizé, UMR 7372, CNRS-La Rochelle Université, 79360, Villiers en Bois, France
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do Prado CCA, Queiroz LG, da Silva FT, de Paiva TCB. Toxicological effects caused by environmental relevant concentrations of ketoconazole in Chironomus sancticaroli (Diptera, Chironomidae) larvae evaluated by oxidative stress biomarkers. Comp Biochem Physiol C Toxicol Pharmacol 2023; 264:109532. [PMID: 36470399 DOI: 10.1016/j.cbpc.2022.109532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/21/2022] [Accepted: 11/30/2022] [Indexed: 12/13/2022]
Abstract
Ketoconazole (KTZ), a broad-spectrum fungicidal drug, has been a significant problem in recent decades due to its toxic action on non-target aquatic organisms. Thus, the present study aimed to evaluate determine the effects that environmental relevant concentration of the commercial formulation of KTZ can exert on benthic macroinvertebrates, more specifically on larvae of the insect Chironomus sancticaroli. Acute toxicity tests with KTZ indicated lethal concentration (LC50) of 9.9 μg/L. Analyses of prolonged exposure to KTZ (chronic toxicity) indicated an increase in the rate of mentum deformity by approximately 3 times at concentrations of 0.6 and 2.4 μg/L. All biomarkers analyzed showed an increase after exposure to KTZ (0.6 and 2.4 μg/L), with average values of 115 % for superoxide dismutase (SOD), 63 % for catalase (CAT), 111 % for glutathione S-transferase (GST) and 59 % for malonaldehyde (MDA) in C. sancticaroli larvae. Thus, the toxic effects on survival, development (length and weight), mentum and redox responses caused by commercial KTZ in low concentrations were observed on C. sancticaroli larvae. In addition, the results suggest that biochemical biomarkers can be used for studies involving environmental disturbances.
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Affiliation(s)
- Caio César Achiles do Prado
- University of Sao Paulo, Engineering School of Lorena, Department of Biotechnology, Lorena 12602-810, Brazil.
| | - Lucas Gonçalves Queiroz
- University of São Paulo, Institute of Biosciences Department of Ecology, São Paulo 05508-090, Brazil
| | - Flávio Teixeira da Silva
- University of Sao Paulo, Engineering School of Lorena, Department of Biotechnology, Lorena 12602-810, Brazil.
| | - Teresa Cristina Brazil de Paiva
- University de Sao Paulo, Engineering School of Lorena, Department of Basic and Environmental Sciences, Lorena 12602-810, Brazil.
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5
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Bellot P, Dupont SM, Brischoux F, Budzinski H, Chastel O, Fritsch C, Lourdais O, Prouteau L, Rocchi S, Angelier F. Experimental Exposure to Tebuconazole Affects Metabolism and Body Condition in a Passerine Bird, the House Sparrow (Passer domesticus). ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2022; 41:2500-2511. [PMID: 35899983 DOI: 10.1002/etc.5446] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 03/01/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
Triazole compounds are among the most widely used fungicides in agroecosystems to protect crops from potential fungal diseases. Triazoles are suspected to have an impact on nontarget species due to their interactions with nonfungal sterol synthesis, and wild birds are likely to be contaminated by triazole fungicides because many of them live in agroecosystems. We experimentally tested whether exposure to environmental concentrations of a triazole could alter key integrative traits (metabolic rates and body condition) of an agroecosystem sentinel species, the house sparrow (Passer domesticus). Wild-caught adult sparrows were maintained in captivity and exposed (exposed group) or not (control group) for 7 continuous months to tebuconazole through drinking water. The metabolic rates of exposed and control sparrows were then measured at two different temperatures (12 °C and 25 °C), which correspond, respectively, to the thermoregulation and thermoneutrality temperatures of this species. We found that exposed sparrows had lower resting metabolic rates (i.e., measured at thermoneutrality, 25 °C) than controls. However, the thermoregulatory metabolic rates (i.e., measured at 12 °C) did not differ between exposed and control sparrows. Although the body mass and condition were not measured at the beginning of the exposure, sparrows at the time of the metabolic measurements 7 months after the onset of such exposure had a higher body condition than controls, supporting further the idea that tebuconazole affects metabolic functions. Our study demonstrates for the first time that the use of tebuconazole can alter metabolism and could potentially lead to adverse effects in birds. Environ Toxicol Chem 2022;41:2500-2511. © 2022 SETAC.
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Affiliation(s)
- Pauline Bellot
- Centre d'Etudes Biologiques de Chizé, CNRS-La Rochelle Université, UMR 7372, Villiers en Bois, France
| | - Sophie Marie Dupont
- Centre d'Etudes Biologiques de Chizé, CNRS-La Rochelle Université, UMR 7372, Villiers en Bois, France
| | - François Brischoux
- Centre d'Etudes Biologiques de Chizé, CNRS-La Rochelle Université, UMR 7372, Villiers en Bois, France
| | - Hélène Budzinski
- University of Bordeaux, CNRS-EPOC, UMR 5805, LPTC Research Group, Talence, France
| | - Olivier Chastel
- Centre d'Etudes Biologiques de Chizé, CNRS-La Rochelle Université, UMR 7372, Villiers en Bois, France
| | - Clémentine Fritsch
- Laboratoire Chrono-Environnement, UMR 6249 CNRS/Université Bourgogne Franche-Comté, Besançon, France
| | - Olivier Lourdais
- Centre d'Etudes Biologiques de Chizé, CNRS-La Rochelle Université, UMR 7372, Villiers en Bois, France
- School of Life Sciences, Arizona State University, Tempe, Arizona, USA
| | - Louise Prouteau
- Centre d'Etudes Biologiques de Chizé, CNRS-La Rochelle Université, UMR 7372, Villiers en Bois, France
- University of Bordeaux, CNRS-EPOC, UMR 5805, LPTC Research Group, Talence, France
| | - Steffi Rocchi
- Laboratoire Chrono-Environnement, UMR 6249 CNRS/Université Bourgogne Franche-Comté, Besançon, France
- Service de Parasitologie-Mycologie, CHU Jean Minjoz, Besançon, France
| | - Frédéric Angelier
- Centre d'Etudes Biologiques de Chizé, CNRS-La Rochelle Université, UMR 7372, Villiers en Bois, France
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6
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Larras F, Charles S, Chaumot A, Pelosi C, Le Gall M, Mamy L, Beaudouin R. A critical review of effect modeling for ecological risk assessment of plant protection products. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:43448-43500. [PMID: 35391640 DOI: 10.1007/s11356-022-19111-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 02/03/2022] [Indexed: 06/14/2023]
Abstract
A wide diversity of plant protection products (PPP) is used for crop protection leading to the contamination of soil, water, and air, which can have ecotoxicological impacts on living organisms. It is inconceivable to study the effects of each compound on each species from each compartment, experimental studies being time consuming and cost prohibitive, and animal testing having to be avoided. Therefore, numerous models are developed to assess PPP ecotoxicological effects. Our objective was to provide an overview of the modeling approaches enabling the assessment of PPP effects (including biopesticides) on the biota. Six categories of models were inventoried: (Q)SAR, DR and TKTD, population, multi-species, landscape, and mixture models. They were developed for various species (terrestrial and aquatic vertebrates and invertebrates, primary producers, micro-organisms) belonging to diverse environmental compartments, to address different goals (e.g., species sensitivity or PPP bioaccumulation assessment, ecosystem services protection). Among them, mechanistic models are increasingly recognized by EFSA for PPP regulatory risk assessment but, to date, remain not considered in notified guidance documents. The strengths and limits of the reviewed models are discussed together with improvement avenues (multigenerational effects, multiple biotic and abiotic stressors). This review also underlines a lack of model testing by means of field data and of sensitivity and uncertainty analyses. Accurate and robust modeling of PPP effects and other stressors on living organisms, from their application in the field to their functional consequences on the ecosystems at different scales of time and space, would help going toward a more sustainable management of the environment. Graphical Abstract Combination of the keyword lists composing the first bibliographic query. Columns were joined together with the logical operator AND. All keyword lists are available in Supplementary Information at https://doi.org/10.5281/zenodo.5775038 (Larras et al. 2021).
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Affiliation(s)
- Floriane Larras
- INRAE, Directorate for Collective Scientific Assessment, Foresight and Advanced Studies, Paris, 75338, France
| | - Sandrine Charles
- University of Lyon, University Lyon 1, CNRS UMR 5558, Laboratory of Biometry and Evolutionary Biology, Villeurbanne Cedex, 69622, France
| | - Arnaud Chaumot
- INRAE, UR RiverLy, Ecotoxicology laboratory, Villeurbanne, F-69625, France
| | - Céline Pelosi
- Avignon University, INRAE, UMR EMMAH, Avignon, 84000, France
| | - Morgane Le Gall
- Ifremer, Information Scientifique et Technique, Bibliothèque La Pérouse, Plouzané, 29280, France
| | - Laure Mamy
- Université Paris-Saclay, INRAE, AgroParisTech, UMR ECOSYS, Thiverval-Grignon, 78850, France
| | - Rémy Beaudouin
- Ineris, Experimental Toxicology and Modelling Unit, UMR-I 02 SEBIO, Verneuil en Halatte, 65550, France.
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7
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M S, N W, K C, Rs P. Pulsed exposure of the macrophyte Lemna minor to herbicides and the mayfly Neocloeon triangulifer to diamide insecticides. CHEMOSPHERE 2021; 273:128582. [PMID: 33081998 DOI: 10.1016/j.chemosphere.2020.128582] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 09/26/2020] [Accepted: 10/06/2020] [Indexed: 05/22/2023]
Abstract
Pesticides applied to agricultural land can enter aquatic ecosystems through runoff or leaching during precipitation events. In a lotic system, these events result in a pulse of exposure to biota living in these systems. The concentration of pesticide increases, peaks, and then gradually declines, and this pulsed exposure may occur multiple times over the course of a growing season. The dynamic nature of exposure to pesticides in the environment is not often mimicked in the laboratory testing of the toxicity of pesticides. The present study investigated the potential latent effects of a 24-h pulsed exposure of metolachlor, metribuzin, MCPA (2-methyl-4-chlorophenoxyacetic acid), MCPP (methylchlorophenoxypropionic acid or mecoprop), dicamba, and 2,4-D to the aquatic macrophyte Lemna minor followed by a 5-day recovery period. The relative sensitivity of L. minor to the herbicides were, in this decreasing order: metolachlor > metribuzin >2,4-D > MCPA > MCPP > dicamba. This study also investigated the effects of short-term exposures of the diamide insecticides cyantraniliprole and chlorantraniliprole on the survival of the larvae of the parthenogenetic mayfly Neocloeon triangulifer. The median lethal concentrations (96-h LC50s) for cyantraniliprole and chlorantraniliprole were 8.60 and 2.92 μg/L, respectively.
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Affiliation(s)
- Sanford M
- University of Guelph, School of Environmental Sciences, Guelph, Ontario, Canada
| | - Washuck N
- University of Guelph, School of Environmental Sciences, Guelph, Ontario, Canada
| | - Carr K
- University of Guelph, School of Environmental Sciences, Guelph, Ontario, Canada
| | - Prosser Rs
- University of Guelph, School of Environmental Sciences, Guelph, Ontario, Canada.
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8
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Cao D, Wu R, Dong S, Wang F, Ju C, Yu S, Xu S, Fang H, Yu Y. Triazole resistance in Aspergillus fumigatus in crop plant soil after tebuconazole applications. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 266:115124. [PMID: 32673931 DOI: 10.1016/j.envpol.2020.115124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 05/30/2020] [Accepted: 06/26/2020] [Indexed: 06/11/2023]
Abstract
Aspergillus fumigatus is the primary agent of invasive aspergillosis (IA) causing high morbidity and mortality in immunocompromised patients. Triazole resistance in A. fumigatus and its sources have gained wide attention. For several years, environmental fungicides use has been proposed as the major cause for triazole resistance in A. fumigatus. However, there are few studies on azole-resistant A. fumigatus (ARAF) selected by triazole fungicides in agricultural systems. We studied the possible emergence of ARAF in the field after exposure to triazole fungicide tebuconazole. Our results showed that exposure to tebuconazole in soil selects for resistance to triazoles in A. fumigatus. The probability of ARAF developing in soils depends upon the concentrations of tebuconazole after application. We suggest that tebuconazole applications should be minimized to reduce selective pressure for the generation of ARAFs.
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Affiliation(s)
- Duantao Cao
- Institute of Pesticide and Environmental Toxicology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Ruilin Wu
- Institute of Pesticide and Environmental Toxicology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Suxia Dong
- Institute of Pesticide and Environmental Toxicology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Feiyan Wang
- Institute of Pesticide and Environmental Toxicology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Chao Ju
- Institute of Pesticide and Environmental Toxicology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Sumei Yu
- Institute of Pesticide and Environmental Toxicology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Shiji Xu
- Institute of Pesticide and Environmental Toxicology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Hua Fang
- Institute of Pesticide and Environmental Toxicology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Yunlong Yu
- Institute of Pesticide and Environmental Toxicology, Key Laboratory of Molecular Biology of Crop Pathogens and Insects, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China.
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9
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Contardo-Jara V, Gessner MO. Uptake and physiological effects of the neonicotinoid imidacloprid and its commercial formulation Confidor® in a widespread freshwater oligochaete. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 264:114793. [PMID: 32559875 DOI: 10.1016/j.envpol.2020.114793] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 04/30/2020] [Accepted: 05/09/2020] [Indexed: 06/11/2023]
Abstract
The neonicotinoid imidacloprid (IMI) is one of the most extensively applied neuro-active insecticides worldwide and continues to enter surface waters in many countries despite a recent ban for outdoor use in the EU. Yet little is known about ecotoxicological effects on non-target benthic freshwater species exposed to environmentally relevant concentrations of IMI and its marketed products. The aim of the present study was to narrow this gap by assessing effects of pure IMI and its commercial formulation Confidor® on the aquatic oligochaete Lumbriculus variegatus, a key species in freshwater sediments. To this end, we determined dose-response relationships in 24 h toxicity tests, bioconcentration during 24 h and 5 d of exposure to 0.1, 1 and 10 μg IMI L-1, and physiological stress responses by measuring glutathione S-transferase, glutathione reductase and catalase activity in the same conditions. Maximum neonicotinoid concentrations reported from the field were lethal to L. variegatus within 24 h (LC50 of 65 and 88 μg IMI L-1 in pure form and as active ingredient of Confidor®, respectively). At sub-lethal exposure concentrations, tissue content of IMI significantly increased with exposure time. The observed bioconcentration factors (BCFs) were far above the water octanol coefficient (KOW), indicating a potentially large underestimation of IMI bioaccumulation when based on KOW. Activities of biotransformation and antioxidant enzymes indicated attempts of L. variegatus to counter xenobiotic-triggered oxidative stress to very low IMI and Confidor® concentrations. Together, our data add significantly to growing evidence that the continued proliferation of neonicotinoids require increased efforts in environmental risk assessment, especially in view of species-specific differences in sensitivities to the insecticide and possibly to additives of commercial formulations.
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Affiliation(s)
- Valeska Contardo-Jara
- Technische Universität Berlin, Department of Ecology, Ernst-Reuter-Platz 1, 10587, Berlin, Germany.
| | - Mark O Gessner
- Technische Universität Berlin, Department of Ecology, Ernst-Reuter-Platz 1, 10587, Berlin, Germany; Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Department of Experimental Limnology, Alte Fischerhütte 2, 16775, Stechlin, Germany
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Wei F, Wang D, Li H, Xia P, Ran Y, You J. Toxicogenomics provides insights to toxicity pathways of neonicotinoids to aquatic insect, Chironomus dilutus. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 260:114011. [PMID: 31991362 DOI: 10.1016/j.envpol.2020.114011] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Revised: 01/03/2020] [Accepted: 01/16/2020] [Indexed: 06/10/2023]
Abstract
Neonicotinoid insecticides have posed a great threat to non-target organisms, yet the mechanisms underlying their toxicity are not well characterized. Major modes of action (MoAs) of imidacloprid were analyzed in an aquatic insect Chironomus dilutus. Lethal and sublethal outcomes were assessed in the midges after 96-h exposure to imidacloprid. Global transcriptomic profiles were determined using de novo RNA-sequencing to more holistically identify toxicity pathways. Transcriptional 10% biological potency values derived from ranked KEGG pathways and GO terms were 0.02 (0.01-0.08) (mean (95% confidence interval) and 0.05 (0.04-0.06) μg L-1, respectively, which were more sensitive than those from phenotypic traits (10% lethal concentration: 0.44 (0.23-0.79) μg L-1; 10% burrowing behavior concentration: 0.30 (0.22-0.43) μg L-1). Major MoAs of imidacloprid in aquatic species were identified as follows: the activation of nicotinic acetylcholine receptors (nAChRs) induced by imidacloprid impaired organisms' nerve system through calcium ion homeostasis imbalance and mitochondrial dysfunction, which posed oxidative stress and DNA damage and eventually caused death of organisms. The current investigation highlighted that imidacloprid affected C. dilutus at environmentally relevant concentrations, and elucidated toxicity pathways derived from gene alteration to individual outcomes, calling for more attention to toxicity of neonicotinoids to aquatic organisms.
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Affiliation(s)
- Fenghua Wei
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 511443, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Dali Wang
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 511443, China
| | - Huizhen Li
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 511443, China
| | - Pu Xia
- Department of Biology, University of Ottawa, Ontario, K1N 6N5, Canada
| | - Yong Ran
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China
| | - Jing You
- Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou, 511443, China.
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Food Shortage Amplifies Negative Sublethal Impacts of Low-Level Exposure to the Neonicotinoid Insecticide Imidacloprid on Stream Mayfly Nymphs. WATER 2019. [DOI: 10.3390/w11102142] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Interactions of pesticides with biotic or anthropogenic stressors affecting stream invertebrates are still poorly understood. In a three-factor laboratory experiment, we investigated effects of the neonicotinoid imidacloprid, food availability, and population density on the New Zealand mayfly Deleatidium spp. (Leptophlebiidae). Larval mayflies (10 or 20 individuals) were exposed to environmentally realistic concentrations of imidacloprid (controls, 0.97 and 2.67 μg L−1) for nine days following five days during which individuals were either starved or fed with stream algae. Imidacloprid exposure had severe lethal and sublethal effects on Deleatidium, with effects of the lower concentration occurring later in the experiment. The starvation period had delayed interactive effects, with prior starvation amplifying imidacloprid-induced increases in mayfly impairment (inability to swim or right themselves) and immobility (no signs of movement besides twitching appendages). Few studies have investigated interactions with other stressors that may worsen neonicotinoid impacts on non-target freshwater organisms, and experiments manipulating food availability or density-dependent processes are especially rare. Therefore, we encourage longer-term multiple-stressor experiments that build on our study, including mesocosm experiments involving realistic stream food webs.
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