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Lorenz S. Sediment characteristics mediate mixture effect of metconazole and thiacloprid on the activity behavior of the amphipod Hyalella azteca. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2024; 266:106781. [PMID: 38043484 DOI: 10.1016/j.aquatox.2023.106781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 11/25/2023] [Accepted: 11/29/2023] [Indexed: 12/05/2023]
Abstract
Pesticide mixtures occur frequently in freshwaters. Here, pesticides can persist over long periods and alter aquatic communities and ecosystems by causing chronic indirect effects. Particularly effects on activity behavior of organisms can be considered as starting points of cascading effects as they provide the basis for further sublethal responses such as reproduction or feeding. Therefore, the impact of two pesticides in combination, the fungicide metconazole and the insecticide thiacloprid, was evaluated on the immobilization and activity behavior of Hyalella azteca with varying sediment conditions. The results showed a change from additive effects to synergism in the mobility tests for sediment with higher contents of total carbon but not for the activity behavior tests using a Multispecies Freshwater Biomonitoring system. However, sediments with high carbon, nitrogen and phosphorous contents led to comparable activity behavior of H. azteca to control conditions after three days of contaminant exposure which was not the case in all other treatments. The autoregressive integrated moving average (ARIMA) forecast approach used showed that this activity behavior remained constant after recovery to pre-exposure levels at least for a time period of 16 h. This study showed that mobility and activity of H. azteca are largely affected by the exposure to pesticides, which is mediated by the structure of the sediment. However, further studies are needed that test activity behavior impairments in environments where the individuals are in direct contact with the sediment that may buffer the pesticide exposure from the water column.
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Affiliation(s)
- Stefan Lorenz
- Institute for Ecological Chemistry, Plant Analysis and Stored Product Protection, Julius Kühn Institute, Königin-Luise-Str. 19, Berlin 14195, Germany.
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2
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Schreiner VC, Liebmann L, Feckler A, Liess M, Link M, Schneeweiss A, Truchy A, von Tümpling W, Vormeier P, Weisner O, Schäfer RB, Bundschuh M. Standard Versus Natural: Assessing the Impact of Environmental Variables on Organic Matter Decomposition in Streams Using Three Substrates. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2023; 42:2007-2018. [PMID: 36718721 DOI: 10.1002/etc.5577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 11/29/2022] [Accepted: 01/25/2023] [Indexed: 06/18/2023]
Abstract
The decomposition of allochthonous organic matter, such as leaves, is a crucial ecosystem process in low-order streams. Microbial communities, including fungi and bacteria, colonize allochthonous organic material, break up large molecules, and increase the nutritional value for macroinvertebrates. Environmental variables are known to affect microbial as well as macroinvertebrate communities and alter their ability to decompose organic matter. Studying the relationship between environmental variables and decomposition has mainly been realized using leaves, with the drawbacks of differing substrate composition and consequently between-study variability. To overcome these drawbacks, artificial substrates have been developed, serving as standardizable surrogates. In the present study, we compared microbial and total decomposition of leaves with the standardized substrates of decotabs and, only for microbial decomposition, of cotton strips, across 70 stream sites in a Germany-wide study. Furthermore, we identified the most influential environmental variables for the decomposition of each substrate from a range of 26 variables, including pesticide toxicity, concentrations of nutrients, and trace elements, using stability selection. The microbial as well as total decomposition of the standardized substrates (i.e., cotton strips and decotabs) were weak or not associated with that of the natural substrate (i.e., leaves, r² < 0.01 to r² = 0.04). The decomposition of the two standardized substrates, however, showed a moderate association (r² = 0.21), which is probably driven by their similar composition, with both being made of cellulose. Different environmental variables were identified as the most influential for each of the substrates and the directions of these relationships contrasted between the substrates. Our results imply that these standardized substrates are unsuitable surrogates when investigating the decomposition of allochthonous organic matter in streams. Environ Toxicol Chem 2023;42:2007-2018. © 2023 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.
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Affiliation(s)
- Verena C Schreiner
- iES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau, Germany
| | - Liana Liebmann
- Helmholtz Centre for Environmental Research, UFZ, Leipzig, Germany
- Department Evolutionary Ecology & Environmental Toxicology, Faculty of Biological Sciences, Institute of Ecology, Diversity and Evolution, Goethe University Frankfurt, Frankfurt am Main, Germany
| | - Alexander Feckler
- iES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau, Germany
- Eusserthal Ecosystem Research Station, RPTU Kaisterslautern-Landau, Eusserthal, Germany
| | - Matthias Liess
- Helmholtz Centre for Environmental Research, UFZ, Leipzig, Germany
- Institute for Environmental Research, RWTH Aachen University, Aachen, Germany
| | - Moritz Link
- iES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau, Germany
| | - Anke Schneeweiss
- iES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau, Germany
| | - Amélie Truchy
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden
- INRAE, Centre Lyon-Grenoble Auvergne-Rhône-Alpes, Villeurbanne, France
| | | | - Philipp Vormeier
- Helmholtz Centre for Environmental Research, UFZ, Leipzig, Germany
- Institute for Environmental Research, RWTH Aachen University, Aachen, Germany
| | - Oliver Weisner
- iES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau, Germany
- Helmholtz Centre for Environmental Research, UFZ, Leipzig, Germany
| | - Ralf B Schäfer
- iES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau, Germany
| | - Mirco Bundschuh
- iES Landau, Institute for Environmental Sciences, RPTU Kaiserslautern-Landau, Landau, Germany
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden
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3
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Sumudumali I, Jayawardana CK, Malavipathirana S, Gunatilake SK, Udayakumara N. Effects of fungicide chlorothalonil on freshwater plankton communities: a microcosm study. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:52062-52072. [PMID: 36826773 DOI: 10.1007/s11356-023-25995-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 02/14/2023] [Indexed: 06/18/2023]
Abstract
Direct and indirect effects of the fungicide chlorothalonil on aquatic plankton community structure were investigated by exposing plankton to chlorothalonil concentrations of 0.010, 0.025, 0.100, 0.250 and 1.000 mg/L over 20 days in 18 microcosms (glass tanks having 8 L of pond water). Each treatment was executed in three replicates. Total phytoplankton and zooplankton abundance and chlorophyll-a concentrations in microcosms were measured 5, 10 and 20 days after pesticide exposure. Plankton community and taxa response to pesticide concentrations were analyzed using the similarity of percentages procedure (SIMPER) and one-way ANOVA test. The results of the study indicated that highest concentration levels of chlorothalonil exposure had a significant impact on phytoplankton and zooplankton taxa. Phytoplankton taxa Amphora sp. and Staurastrum sp. and zooplankton taxa Moina sp. and copepod Nauplius were highly sensitive to chlorothalonil exposure. Phytoplankton taxa Mougeotia sp. increased with increased chlorothalonil (0.1-1.0 mg/L) concentrations, and zooplankton taxa of Aeolosoma sp. showed no significant reduction of individuals in response to pesticide exposure. Results showed that pesticide residues have a direct and rapid impact on phytoplankton and zooplankton community structure. Changes in diversity and species composition induced by pesticides indicate the importance of considering indirect effects of pesticides on the ecological food chain in the aquatic environment.
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Affiliation(s)
- Iresha Sumudumali
- Faculty of Graduate Studies, Sabaragamuwa University of Sri Lanka, Belihiloya, Sri Lanka
| | - Chandramali Kumari Jayawardana
- Department of Natural Resources, Faculty of Applied Sciences, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka.
| | - Sarath Malavipathirana
- Department of Physical Science and Technology, Faculty of Applied Sciences, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka
| | - Sunethra Kanthi Gunatilake
- Department of Natural Resources, Faculty of Applied Sciences, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka
| | - Nimal Udayakumara
- Department of Natural Resources, Faculty of Applied Sciences, Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka
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4
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Villamarín C, Cañedo-Argüelles M, Carvajal-Rebolledo C, Ríos-Touma B. Effects of Pesticides on the Survival of Shredder Nectopsyche sp. (Trichoptera) and Leaf Decomposition Rates in Tropical Andes: A Microcosm Approach. TOXICS 2022; 10:720. [PMID: 36548553 PMCID: PMC9781452 DOI: 10.3390/toxics10120720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 11/18/2022] [Accepted: 11/21/2022] [Indexed: 06/17/2023]
Abstract
Andean streams are becoming increasingly impacted by agricultural activities. However, the potential effects of pesticides on their aquatic biodiversity remain unassessed. In order to address this knowledge gap, we conducted an experiment over 37 days in microcosms to assess the effect of two pesticides commonly used in Ecuador (Engeo and Chlorpyrifos) on the aquatic insect Nectopsyche sp. (Trichoptera: Leptoceridae) at 0, 0.10, 5 and 10 μg L-1 concentrations. The highest concentration corresponds to the maximum concentration allowed by the Equatorian legislation. We assessed insect mortality every 24 h, with leaf litter decomposition rates of organic matter determined by deploying Andean alder (Alnus acuminata) dry leaf packs in the microcosms. We found significant mortality of Nectopsyche sp. at high concentrations of Chlorpyrifos, whereas leaf litter was not significantly affected by any of the treatments. We conclude that the environmental legislation of Ecuador might not be fully protecting aquatic biodiversity from pesticide pollution. Further studies are needed, especially when considering that the maximum permitted concentration is very likely exceeded in many areas of the country. We also suggest that the maximum permissible values should be reviewed, considering each pesticide individually.
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Affiliation(s)
- Christian Villamarín
- Grupo de Investigación Biodiversidad, Medio Ambiente y Salud (BIOMAS), Universidad de Las Américas, Quito 170503, Ecuador
- Ingeniería Ambiental, Facultad de Ingenierías y Ciencias Aplicadas, Universidad de Las Américas, Quito 170503, Ecuador
| | - Miguel Cañedo-Argüelles
- FEHM-Lab, Institute of Environmental Assessment and Water Research (IDAEA-CSIC), 08016 Barcelona, Spain
| | - Constanza Carvajal-Rebolledo
- Ingeniería Ambiental, Facultad de Ingenierías y Ciencias Aplicadas, Universidad de Las Américas, Quito 170503, Ecuador
| | - Blanca Ríos-Touma
- Grupo de Investigación Biodiversidad, Medio Ambiente y Salud (BIOMAS), Universidad de Las Américas, Quito 170503, Ecuador
- Ingeniería Ambiental, Facultad de Ingenierías y Ciencias Aplicadas, Universidad de Las Américas, Quito 170503, Ecuador
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5
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Zhang D, Zhou N, Yang LJ, Yu ZL, Ma DJ, Wang DW, Li YH, Liu B, Wang BF, Xu H, Xi Z. Discovery of (5-(Benzylthio)-4-(3-(trifluoromethyl)phenyl)-4 H-1,2,4-triazol-3-yl) Methanols as Potent Phytoene Desaturase Inhibitors through Virtual Screening and Structure Optimization. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:10144-10157. [PMID: 35946897 DOI: 10.1021/acs.jafc.2c02981] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Phytoene desaturase (PDS) is not only an important enzyme in the biosynthesis of carotenoids but also a promising target for herbicide discovery. However, in recent years, no expected PDS inhibitors with new scaffolds have been reported. Hence, a solution for developing PDS inhibitors is to search for new compounds with novel chemotypes based on the PDS protein structure. In this work, we integrated structure-based virtual screening, structure-guided optimization, and biological evaluation to discover some PDS inhibitors with novel chemotypes. It is noteworthy that the highly potent compound 1b, 1-(4-chlorophenyl)-2-((5-(hydroxymethyl)-4-(3-(trifluoromethyl)phenyl)-4H-1,2,4-triazol-3-yl)thio)ethan-1-one, exhibited a broader spectrum of post-emergence herbicidal activity at 375-750 g/ha against six kinds of weeds than the commercial PDS inhibitor diflufenican. Surface plasmon resonance (SPR) assay showed that the affinity of our compound 1b (KD = 65.9 μM) to PDS is slightly weaker but at the same level as diflufenican (KD = 38.3 μM). Meanwhile, determination of the phytoene content and PDS mRNA quantification suggested that 1b could induce PDS mRNA reduction and phytoene accumulation. Moreover, 1b also caused the increase of reactive oxygen species (ROS) and the change of ROS-associated enzyme activity in albino leaves. Hence, all these results indicated the feasibility of PDS protein structure-based virtual screen and structure optimization to search for highly potent PDS inhibitors with novel chemotypes for weed control.
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Affiliation(s)
- Di Zhang
- National Pesticide Engineering Research Center (Tianjin), Department of Chemical Biology, State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Nuo Zhou
- National Pesticide Engineering Research Center (Tianjin), Department of Chemical Biology, State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Li-Jun Yang
- National Pesticide Engineering Research Center (Tianjin), Department of Chemical Biology, State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Zhi-Lei Yu
- National Pesticide Engineering Research Center (Tianjin), Department of Chemical Biology, State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - De-Jun Ma
- National Pesticide Engineering Research Center (Tianjin), Department of Chemical Biology, State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Da-Wei Wang
- National Pesticide Engineering Research Center (Tianjin), Department of Chemical Biology, State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Yong-Hong Li
- National Pesticide Engineering Research Center (Tianjin), Department of Chemical Biology, State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Bin Liu
- National Pesticide Engineering Research Center (Tianjin), Department of Chemical Biology, State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Bai-Fan Wang
- National Pesticide Engineering Research Center (Tianjin), Department of Chemical Biology, State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Han Xu
- National Pesticide Engineering Research Center (Tianjin), Department of Chemical Biology, State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Zhen Xi
- National Pesticide Engineering Research Center (Tianjin), Department of Chemical Biology, State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, P. R. China
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6
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Lin Y, Xie J, Xiang Q, Liu Y, Wang P, Wu Y, Zhou Y. Effect of propiconazole on plastic film microplastic degradation: Focusing on the change in microplastic morphology and heavy metal distribution. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 822:153609. [PMID: 35121034 DOI: 10.1016/j.scitotenv.2022.153609] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 01/03/2022] [Accepted: 01/28/2022] [Indexed: 06/14/2023]
Abstract
With the rapid increase in the use of plastic films, microplastic (MP) pollution in agricultural soils has become a global environmental problem. Propiconazole is widely used in agriculture and horticulture; however, its role in plastic film degradation remains elusive. Butylene adipate-co-terephthalate (PBAT) and polyethylene (PE) films were used to analyze the effects of propiconazole on plastic film and MP degradation. We identified the surface morphologies of PBAT and PE at different propiconazole concentrations and soil pH values, as well as the adsorption and release characteristics of heavy metals during the degradation process via scanning electron microscopy, Fourier transform infrared spectroscopy and inductively coupled plasma mass spectrometry. Propiconazole accelerated the degradation of MPs, adsorption of heavy metals (Ni and Zn), and release of Sn at low concentrations (≤40 mg/kg); however, these effects were evidently absent at a high concentration (120 mg/kg). Furthermore, MPs were more prone to degradation in acidic or alkaline soils than in neutral soil when they coexisted with propiconazole. Hence, we suggest that PBAT and PE plastic films may not be suitable for application in acidic and alkaline soils with propiconazole, because of shorter rupture time and more heavy metal adsorption. PBAT degraded faster, absorbed and released more heavy metals than PE. Under all tested conditions, the heavy metal contents in MPs gradually approached those in soil, which proves that MPs are carriers of heavy metal pollutants. These results may help in assessing the impact of MPs on soil environments and provide a theoretical basis for the standardized propiconazole and plastic film usage.
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Affiliation(s)
- Yimiao Lin
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Jiafei Xie
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Qingqing Xiang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yi Liu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Pingya Wang
- Zhoushan Institute for Food and Drug Control, Zhoushan 316012, China
| | - Yichun Wu
- Zhoushan Institute for Food and Drug Control, Zhoushan 316012, China
| | - Ying Zhou
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China; Environmental Microplastic Pollution Research Center, Zhejiang University of Technology, Hangzhou 310014, China.
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7
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Wang Y, Chen C, Yang G, Wang X, Wang Q, Weng H, Zhang Z, Qian Y. Combined lethal toxicity, biochemical responses, and gene expression variations induced by tebuconazole, bifenthrin and their mixture in zebrafish (Danio rerio). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 230:113116. [PMID: 34979316 DOI: 10.1016/j.ecoenv.2021.113116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 12/20/2021] [Accepted: 12/21/2021] [Indexed: 06/14/2023]
Abstract
Pesticides commonly occur as mixtures in an aqueous environment, causing deleterious effects on human health and the environment. However, the mechanism underlying the combined effects on aqueous organisms remains largely unknown, especially at low concentrations. In the current study, we inspected the interactive toxicity of tebuconazole (TEB), a triazole fungicide, and bifenthrin (BIF), a pyrethroid insecticide, to zebrafish (Danio rerio) using various toxicological assays. Our data revealed that the 96 h-LC50 (lethal concentration 50) values of BIF to fish at different life periods (embryonic, larval, juvenile, and adult periods) ranged from 0.013 (0.011-0.016) to 0.41 (0.35-0.48) mg a.i. L-1, which were lower than that of TEB ranging from 1.1 (0.88-1.3) to 4.8 (4.1-5.7) mg a.i. L-1. Combination of TEB and BIF induced synergetic acute toxicity to embryonic fish. Activities of T-SOD, POD, and GST were distinctly altered in most individual and joint administrations. Expressions of 16 genes associated with oxidative stress, cellular apoptosis, immune system, and endocrine system at the mRNA level were evaluated, and the information revealed that embryonic zebrafish were impacted by both individual compounds and their combinations. Six genes (cas9, P53, gr, TRα, IL-8, and cxcl-clc) exhibited greater changes when exposed to pesticide mixtures. Therefore, the joint effects induced by the pesticides at low concentrations should be considered in the risk assessment of mixtures and regulated as priorities for mixture risk management in the aqueous ecosystem. More research is needed to identify the threshold concentrations of the realistic pesticide mixtures above which synergistic interactions occur.
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Affiliation(s)
- Yanhua Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, Zhejiang, China
| | - Chen Chen
- School of Public Health, Shandong University, Jinan 250012, Shandong, China
| | - Guiling Yang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, Zhejiang, China
| | - Xinquan Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, Zhejiang, China
| | - Qiang Wang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, Zhejiang, China
| | - Hongbiao Weng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, Zhejiang, China
| | - Zhiheng Zhang
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products, Institute of Quality and Standard for Agro-products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, Zhejiang, China.
| | - Yongzhong Qian
- Key Laboratory of Agro-Product Quality and Safety of Ministry of Agriculture, Institute of Quality Standards and Testing Technology for Agro-Products, Chinese Academy of Agricultural Sciences, Beijing 100081, China.
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8
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Sánchez-Bayo F. Indirect Effect of Pesticides on Insects and Other Arthropods. TOXICS 2021; 9:177. [PMID: 34437495 PMCID: PMC8402326 DOI: 10.3390/toxics9080177] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 12/04/2022]
Abstract
Pesticides released to the environment can indirectly affect target and non-target species in ways that are often contrary to their intended use. Such indirect effects are mediated through direct impacts on other species or the physical environment and depend on ecological mechanisms and species interactions. Typical mechanisms are the release of herbivores from predation and release from competition among species with similar niches. Application of insecticides to agriculture often results in subsequent pest outbreaks due to the elimination of natural enemies. The loss of floristic diversity and food resources that result from herbicide applications can reduce populations of pollinators and natural enemies of crop pests. In aquatic ecosystems, insecticides and fungicides often induce algae blooms as the chemicals reduce grazing by zooplankton and benthic herbivores. Increases in periphyton biomass typically result in the replacement of arthropods with more tolerant species such as snails, worms and tadpoles. Fungicides and systemic insecticides also reduce nutrient recycling by impairing the ability of detritivorous arthropods. Residues of herbicides can reduce the biomass of macrophytes in ponds and wetlands, indirectly affecting the protection and breeding of predatory insects in that environment. The direct impacts of pesticides in the environment are therefore either amplified or compensated by their indirect effects.
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Affiliation(s)
- Francisco Sánchez-Bayo
- School of Life and Environmental Sciences, The University of Sydney, Eveleigh, NSW 2015, Australia
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9
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Boyero L, López-Rojo N, Tonin AM, Pérez J, Correa-Araneda F, Pearson RG, Bosch J, Albariño RJ, Anbalagan S, Barmuta LA, Basaguren A, Burdon FJ, Caliman A, Callisto M, Calor AR, Campbell IC, Cardinale BJ, Jesús Casas J, Chará-Serna AM, Chauvet E, Ciapała S, Colón-Gaud C, Cornejo A, Davis AM, Degebrodt M, Dias ES, Díaz ME, Douglas MM, Encalada AC, Figueroa R, Flecker AS, Fleituch T, García EA, García G, García PE, Gessner MO, Gómez JE, Gómez S, Gonçalves JF, Graça MAS, Gwinn DC, Hall RO, Hamada N, Hui C, Imazawa D, Iwata T, Kariuki SK, Landeira-Dabarca A, Laymon K, Leal M, Marchant R, Martins RT, Masese FO, Maul M, McKie BG, Medeiros AO, Erimba CMM, Middleton JA, Monroy S, Muotka T, Negishi JN, Ramírez A, Richardson JS, Rincón J, Rubio-Ríos J, Dos Santos GM, Sarremejane R, Sheldon F, Sitati A, Tenkiano NSD, Tiegs SD, Tolod JR, Venarsky M, Watson A, Yule CM. Impacts of detritivore diversity loss on instream decomposition are greatest in the tropics. Nat Commun 2021; 12:3700. [PMID: 34140471 PMCID: PMC8211652 DOI: 10.1038/s41467-021-23930-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 05/25/2021] [Indexed: 11/29/2022] Open
Abstract
The relationship between detritivore diversity and decomposition can provide information on how biogeochemical cycles are affected by ongoing rates of extinction, but such evidence has come mostly from local studies and microcosm experiments. We conducted a globally distributed experiment (38 streams across 23 countries in 6 continents) using standardised methods to test the hypothesis that detritivore diversity enhances litter decomposition in streams, to establish the role of other characteristics of detritivore assemblages (abundance, biomass and body size), and to determine how patterns vary across realms, biomes and climates. We observed a positive relationship between diversity and decomposition, strongest in tropical areas, and a key role of abundance and biomass at higher latitudes. Our results suggest that litter decomposition might be altered by detritivore extinctions, particularly in tropical areas, where detritivore diversity is already relatively low and some environmental stressors particularly prevalent. It is unclear whether stream detritivore diversity enhances decomposition across climates. Here the authors manipulate litter diversity and examine detritivore assemblages in a globally distributed stream litterbag experiment, finding a positive diversity-decomposition relationship stronger in tropical streams, where detritivore diversity is lower.
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Affiliation(s)
- Luz Boyero
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Leioa, Spain. .,IKERBASQUE, Bilbao, Spain.
| | - Naiara López-Rojo
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Alan M Tonin
- Department of Ecology, University of Brasília (UnB), Brasília, Brazil
| | - Javier Pérez
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | | | - Richard G Pearson
- Centre for Tropical Water and Aquatic Ecosystem Research (TropWATER), James Cook University, Townsville, QLD, Australia.,College of Science and Engineering, James Cook University, Townsville, QLD, Australia
| | - Jaime Bosch
- Research Unit of Biodiversity (CSIC, UO, PA), Oviedo University, Mieres, Spain.,Museo Nacional de Ciencias Naturales-CSIC, Madrid, Spain
| | - Ricardo J Albariño
- INIBIOMA (Universidad Nacional del Comahue - CONICET), Bariloche, Argentina
| | | | - Leon A Barmuta
- Biological Sciences, School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia
| | - Ana Basaguren
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Francis J Burdon
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Adriano Caliman
- Department of Ecology, Federal University of Rio Grande do Norte (UFRN), Rio Grande do Norte, Brazil
| | - Marcos Callisto
- Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Adolfo R Calor
- Instituto de Biologia, Universidade Federal da Bahia, Bahia, Brazil
| | | | - Bradley J Cardinale
- Department of Ecosystem Science and Management, Penn State University, University Park, PA, USA
| | - J Jesús Casas
- Department of Biology and Geology, University of Almería, Almería, Spain
| | - Ana M Chará-Serna
- Centro para la Investigación en Sistemas Sostenibles de Producción Agropecuaria (CIPAV), Cali, Colombia.,Illinois River Biological Station, University of Illinois Urbana-Champaign, Havana, IL, USA
| | - Eric Chauvet
- Laboratoire Écologie Fonctionnelle et Environnement, Université de Toulouse, CNRS, Toulouse, France
| | - Szymon Ciapała
- Faculty of Tourism and Leisure, University of Physical Education, Kraków, Poland
| | - Checo Colón-Gaud
- Department of Biology, Georgia Southern University, Statesboro, GA, USA
| | - Aydeé Cornejo
- Freshwater Macroinvertebrate Laboratory Gorgas Memorial Institute for Health Studies (COZEM-ICGES), Panama City, Panama
| | - Aaron M Davis
- Centre for Tropical Water and Aquatic Ecosystem Research (TropWATER), James Cook University, Townsville, QLD, Australia
| | - Monika Degebrodt
- Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Stechlin, Germany
| | - Emerson S Dias
- Graduate Program in Ecology, Federal University of Rio Grande do Norte (UFRN), Natal, Brazil
| | - María E Díaz
- Departamento de Ciencias Ambientales, Universidad Católica de Temuco, Temuco, Chile.,Facultad de Ciencias Ambientales y Centro EULA-Chile, Universidad de Concepción, Concepción, Chile
| | - Michael M Douglas
- School of Biological Sciences, The University of Western Australia, Crawley, WA, Australia
| | - Andrea C Encalada
- Instituto BIOSFERA, Universidad San Francisco de Quito, Quito, Ecuador.,Department of Life Sciences and Marine and Environmental Sciences Centre (MARE), University of Coimbra, Coimbra, Portugal
| | - Ricardo Figueroa
- Facultad de Ciencias Ambientales y Centro EULA-Chile, Universidad de Concepción, Concepción, Chile
| | - Alexander S Flecker
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, USA
| | - Tadeusz Fleituch
- Institute of Nature Conservation, Polish Academy of Sciences, Kraków, Poland
| | - Erica A García
- Research Institute for the Environment and Livelihoods, Charles Darwin University, Casuarina, NT, Australia
| | - Gabriela García
- Water Laboratory and Physicochemical Services (LASEF), Autonomous University of Chiriqui, David City, Panama
| | - Pavel E García
- Escuela de Biología, Universidad de San Carlos de Guatemala, Guatemala City, Guatemala.,Organismal Biology, Ecology and Evolution (OBEE) program, University of Montana, Montana, MO, USA
| | - Mark O Gessner
- Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Stechlin, Germany.,Berlin Institute of Technology (TU Berlin), Berlin, Germany
| | - Jesús E Gómez
- Departamento de Ciencias Ambientales, Universidad de Puerto Rico, San Juan, Puerto Rico
| | - Sergio Gómez
- Department of Ecology and Evolutionary Biology, Cornell University, Ithaca, NY, USA
| | - Jose F Gonçalves
- Department of Ecology, University of Brasília (UnB), Brasília, Brazil
| | - Manuel A S Graça
- Department of Life Sciences and Marine and Environmental Sciences Centre (MARE), University of Coimbra, Coimbra, Portugal
| | | | - Robert O Hall
- Flathead Lake Biological Station, University of Montana, Polson, MT, USA
| | - Neusa Hamada
- Instituto Nacional de Pesquisas da Amazônia-INPA, Coordenação de Biodiversidade-COBIO, Manaus, Amazonas, Brazil
| | - Cang Hui
- Department of Mathematical Sciences, Stellenbosch University, Matieland, South Africa.,Biodiversity Informatics Unit, African Institute for Mathematical Sciences, Cape Town, South Africa
| | - Daichi Imazawa
- Integrated Graduate School of Medicine, Engineering, and Agricultural Sciences, University of Yamanashi, Kofu, Japan
| | - Tomoya Iwata
- Faculty of Life and Environmental Sciences, University of Yamanashi, Kofu, Japan
| | | | - Andrea Landeira-Dabarca
- Instituto BIOSFERA, Universidad San Francisco de Quito, Quito, Ecuador.,Biometric Research, South Fremantle, WA, Australia
| | - Kelsey Laymon
- Department of Biology, Georgia Southern University, Statesboro, GA, USA
| | - María Leal
- Laboratorio de Contaminación Acuática y Ecología Fluvial, Universidad del Zulia, Maracaibo, Venezuela
| | - Richard Marchant
- Department of Entomology, Museums Victoria, Melbourne, VIC, Australia
| | - Renato T Martins
- Instituto Nacional de Pesquisas da Amazônia-INPA, Coordenação de Biodiversidade-COBIO, Manaus, Amazonas, Brazil
| | - Frank O Masese
- Department of Fisheries and Aquatic Science, University of Eldoret, Eldoret, Kenya
| | - Megan Maul
- Department of Biological Sciences, Oakland University, Rochester, MI, USA
| | - Brendan G McKie
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | | | | | - Jen A Middleton
- School of Biological Sciences, The University of Western Australia, Crawley, WA, Australia
| | - Silvia Monroy
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Timo Muotka
- INRAE, UR-RiverLy, Centre de Lyon-Villeurbanne, Villeurbanne Cedex, France
| | - Junjiro N Negishi
- Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Alonso Ramírez
- Department of Applied Ecology, North Carolina State University, Raleigh, NC, USA
| | - John S Richardson
- Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, BC, Canada
| | - José Rincón
- Laboratorio de Contaminación Acuática y Ecología Fluvial, Universidad del Zulia, Maracaibo, Venezuela
| | - Juan Rubio-Ríos
- Department of Biology and Geology, University of Almería, Almería, Spain
| | - Gisele M Dos Santos
- Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.,Departamento de Ecologia, Universidade Federal de Goiás (UFG), Goiânia, Goiás, Brazil
| | - Romain Sarremejane
- INRAE, UR-RiverLy, Centre de Lyon-Villeurbanne, Villeurbanne Cedex, France
| | - Fran Sheldon
- Australian Rivers Institute, Griffith University, Nathan, QLD, Australia
| | - Augustine Sitati
- Department of Fisheries and Aquatic Science, University of Eldoret, Eldoret, Kenya
| | | | - Scott D Tiegs
- Department of Biological Sciences, Oakland University, Rochester, MI, USA
| | - Janine R Tolod
- Faculty of Environmental Earth Science, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Michael Venarsky
- Australian Rivers Institute, Griffith University, Nathan, QLD, Australia
| | - Anne Watson
- Biological Sciences, School of Natural Sciences, University of Tasmania, Hobart, TAS, Australia
| | - Catherine M Yule
- School of Science, Technology and Engineering, University of the Sunshine Coast, Sunshine Coast, QLD, Australia
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10
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Arias M, Bonetto C, Mugni H. Sublethal effects on Simocephalus vetulus (Cladocera: Daphnidae) of pulse exposures of cypermethrin. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 196:110546. [PMID: 32251952 DOI: 10.1016/j.ecoenv.2020.110546] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 03/22/2020] [Accepted: 03/25/2020] [Indexed: 06/11/2023]
Abstract
Pyrethroids are among the most widely applied insecticides worldwide and cypermethrin is the pyrethroid most used in Argentina. Pesticides used in crops can reach adjacent watercourses through runoff and may lead to non-target fauna receiving toxic pulse exposures. The aim of this study was to determine the effects of cypermethrin pulse exposures on the widely distributed crustacean Simocephalus vetulus. The 48h-LC50 of cypermethrin for S. vetulus was determined at 0.18 ± 0.09 μg/L. To assess the effects of cypermethrin under environmentally realistic exposures, two experiments were performed. In the first one, specimens were exposed for 90 min to cypermethrin at 0.02 (T1), 0.2 (T2) and 1 μg/L (T3), transferred to clean water and monitored for 24 h as regards survival and feeding rates; specimens exposed to T2 and T3 concentrations showed significant lower feeding rates than those in the control group. In the second experiment, specimens were exposed for 90 min every 7 days and monitored over 25 days; S. vetulus showed lower cumulative fecundity and reproduction rates at all concentrations tested, and lower population growth at the highest concentration. All exposure concentrations lay within reported environmental concentrations and risk assessment indicated risk (RQ > 1), suggesting that sensitive species would be affected by such pulse exposures of cypermethrin. The present study thus suggests that ongoing agricultural practices affect the non-target invertebrates in streams adjacent to crops.
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Affiliation(s)
- Marina Arias
- Instituto de Limnología "Dr. Raúl A. Ringuelet" (ILPLA), UNLP-CONICET-FCNyM, Boulevard 120 y 62, 1900, La Plata, Buenos Aires, Argentina.
| | - Carlos Bonetto
- Instituto de Limnología "Dr. Raúl A. Ringuelet" (ILPLA), UNLP-CONICET-FCNyM, Boulevard 120 y 62, 1900, La Plata, Buenos Aires, Argentina
| | - Hernán Mugni
- Instituto de Limnología "Dr. Raúl A. Ringuelet" (ILPLA), UNLP-CONICET-FCNyM, Boulevard 120 y 62, 1900, La Plata, Buenos Aires, Argentina
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11
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Cornejo A, Pérez J, Alonso A, López-Rojo N, Monroy S, Boyero L. A common fungicide impairs stream ecosystem functioning through effects on aquatic hyphomycetes and detritivorous caddisflies. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 263:110425. [PMID: 32179487 DOI: 10.1016/j.jenvman.2020.110425] [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: 12/13/2019] [Revised: 02/24/2020] [Accepted: 03/08/2020] [Indexed: 06/10/2023]
Abstract
Fungicides can reach streams through runoff or adhered to leaf litter, and have the potential to adversely affect processes such as litter decomposition and associated communities. This study investigated the effects of chlorothalonil, a widely used fungicide, on litter decomposition, detritivorous invertebrates (larvae of the insect Sericostoma pyrenaicum) and aquatic hyphomycetes (AHs), using stream microcosms. We considered the single and combined effects of two exposure modes: waterborne fungicide (at two concentrations: 0.125 μg L-1 and 1.25 μg L-1) and litter previously sprayed with the fungicide (i.e., pre-treated litter, using the application dose concentration of 1250 μg L-1). We also assessed whether fungicide effects on invertebrates, AHs and decomposition varied among litter types (i.e., different plant species), and whether plant diversity mitigated any of those effects. Invertebrate survival and AH sporulation rate and taxon richness were strongly reduced by most combinations of fungicide exposure modes; however, invertebrates were not affected by the low waterborne concentration, whereas AHs suffered the highest reduction at this concentration. Total decomposition was slowed down by both exposure modes, and microbial decomposition was reduced by litter pre-treatment, while the waterborne fungicide had different effects depending on plant species. In general, with the exception of microbial decomposition, responses varied little among litter types. Moreover, and contrary to our expectation, plant diversity did not modulate the fungicide effects. Our results highlight the severity of fungicide inputs to streams through effects on invertebrate and microbial communities and ecosystem functioning, even in streams with well-preserved, diverse riparian vegetation.
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Affiliation(s)
- Aydeé Cornejo
- Freshwater Macroinvertebrate Laboratory. Zoological Collection Dr. Eustorgio Mendez, Gorgas Memorial Institute for Health Studies (COZEM-ICGES), Ave. Justo Arosemena and Calle 35, 0816-02593, Panama City, Panama; Doctoral Program in Natural Sciences with emphasis in Entomology, University of Panama, Panama City, Panama.
| | - Javier Pérez
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Alberto Alonso
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Naiara López-Rojo
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Silvia Monroy
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa, Spain
| | - Luz Boyero
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Leioa, Spain; IKERBASQUE, Bilbao, Spain
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12
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López-Rojo N, Pérez J, Alonso A, Correa-Araneda F, Boyero L. Microplastics have lethal and sublethal effects on stream invertebrates and affect stream ecosystem functioning. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 259:113898. [PMID: 31927275 DOI: 10.1016/j.envpol.2019.113898] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 11/22/2019] [Accepted: 12/28/2019] [Indexed: 06/10/2023]
Abstract
Microplastics (MPs) are contaminants of increasing concern due to their abundance, ubiquity and persistence over time. However, knowledge about MP distribution in fresh waters and their effects on freshwater organisms is still scarce, and there is virtually no information about their potential influence on ecosystem functioning. We used a microcosm experiment to examine the effects of MPs (fluorescent, 10-μm polystyrene microspheres) at different concentrations (from 0 to 103 particles mL-1) on leaf litter decomposition (a key process in stream ecosystems) and associated organisms (the caddisfly detritivore Sericostoma pyrenaicum), and the extent to which MPs were attached to leaf litter and ingested and egested by detritivores, thus assessing mechanisms of MP trophic transfer. We found that MPs caused detritivore mortality (which increased 9-fold at the highest concentration) but did not affect their growth. Analysis of fluorescence in samples suggested that MPs were rapidly ingested (most likely through ingestion of particles attached to leaf litter) and egested. Leaf litter decomposition was reduced as a result of increasing MP concentrations; the relationship was significant only in the presence of detritivores, but microbially-mediated decomposition showed a similar trend. Our findings provide novel evidence of harmful effects of MPs on aquatic insects and stream ecosystem functioning, and highlight the need for the standardization of methods in future experiments with MPs in order to allow comparisons and generalizations.
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Affiliation(s)
- Naiara López-Rojo
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940, Leioa, Spain.
| | - Javier Pérez
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940, Leioa, Spain
| | - Alberto Alonso
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940, Leioa, Spain
| | - Francisco Correa-Araneda
- Unidad de Cambio Climático y Medio Ambiente, Instituto de Estudios del Hábitat, Facultad de Arquitectura y Construcción, Universidad Autónoma de Chile, Temuco, Chile
| | - Luz Boyero
- Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940, Leioa, Spain; IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
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13
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Rico A, Brock TCM, Daam MA. Is the Effect Assessment Approach for Fungicides as Laid Down in the European Food Safety Authority Aquatic Guidance Document Sufficiently Protective for Freshwater Ecosystems? ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2019; 38:2279-2293. [PMID: 31211455 DOI: 10.1002/etc.4520] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 05/22/2019] [Accepted: 06/14/2019] [Indexed: 06/09/2023]
Abstract
In Europe, the European Food Safety Authority aquatic guidance document describes the procedures for the derivation of regulatory acceptable concentrations (RACs) for pesticides in edge-of-field surface waters on the basis of tier-1 (standard test species), tier-2 (geometric mean and species sensitivity distributions [SSDs]), and tier-3 (model ecosystem studies) approaches. In the present study, the protectiveness of such a tiered approach was evaluated for fungicides. Acute and chronic RACs for tier-1 and tier-2B (SSDs) were calculated using toxicity data for standard and additional test species, respectively. Tier-3 RACs based on ecological thresholds (not considering recovery) could be derived for 18 fungicides. We show that tier-1 RACs, in the majority of cases, are more conservative than RACs calculated based on model ecosystem experiments. However, acute tier-2B RACs do not show a sufficient protection level compared with tier-3 RACs from cosm studies that tested a repeated pulsed exposure regime or when relatively persistent compounds were tested. Chronic tier-2B RACs showed a sufficient protection level, although they could only be evaluated for 6 compounds. Finally, we evaluated the suitability of the calculated RACs for 8 compounds with toxicity data for fungi. The comparison shows that the current RACs for individual fungicides, with a few exceptions (e.g., tebuconazole), show a sufficient protection level for structural and functional fungal endpoints. However, more data are needed to extend this comparison to other fungicides with different modes of action. Environ Toxicol Chem 2019;38:2279-2293. © 2019 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals, Inc. on behalf of SETAC.
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Affiliation(s)
- Andreu Rico
- Madrid Institute of Advanced Studies on Water (IMDEA Water Institute), Science and Technology Campus of the University of Alcalá, Alcalá de Henares, Madrid, Spain
| | - Theo C M Brock
- Wageningen Environmental Research, Wageningen University and Research, Wageningen, The Netherlands
| | - Michiel A Daam
- Center for Environmental and Sustainability Research, Department of Environmental Sciences and Engineering, Faculty of Sciences and Technology, New University of Lisbon, Caparica, Portugal
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14
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Raby M, Maloney E, Poirier DG, Sibley PK. Acute Effects of Binary Mixtures of Imidacloprid and Tebuconazole on 4 Freshwater Invertebrates. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2019; 38:1093-1103. [PMID: 30724382 DOI: 10.1002/etc.4386] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 11/20/2018] [Accepted: 02/04/2019] [Indexed: 06/09/2023]
Abstract
Receiving waters from agricultural areas can contain multiple pesticides such as the neonicotinoid imidacloprid and the fungicide tebuconazole, leading to the potential for aquatic life to be exposed to such mixtures. In the present study, the effects of tebuconazole were tested alone and in binary mixtures with imidacloprid on 4 aquatic invertebrates: Chironomus dilutus, Hyalella azteca, Lumbriculus variegatus, and Neocloeon triangulifer. Acute (96-h) median lethal concentrations (LC50s) were derived for individual compounds and used to design a binary mixture study to determine cumulative effects. The LC50s showed that imidacloprid was more potent than tebuconazole by 1 to 3 orders of magnitude for the 4 species. Lethality data from mixture experiments were analyzed using MIXTOX to determine deviations from independent action, followed by the model deviation ratio (MDR) technique to determine the biological significance and reproducibility of observed mixture effects. MIXTOX showed that the cumulative toxicities of imidacloprid-tebuconazole differed between the species: for C. dilutus there was no deviation from independent action; however, for H. azteca the mixture was antagonistic (specifically dose ratio-dependent), and for N. triangulifer it was synergistic. The MDR method showed that only observations with H. azteca significantly deviated from independent action. Because of the lack of evidence of a clear deviation from independent action and the much greater potency of imidacloprid, the weight of evidence indicates that the presence of tebuconazole is unlikely to appreciably increase the hazard from imidacloprid exposure to aquatic invertebrates. Environ Toxicol Chem 2019;00:1-17. © 2019 SETAC.
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Affiliation(s)
- Melanie Raby
- School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Erin Maloney
- Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - David G Poirier
- Laboratory Services Branch, Ontario Ministry of the Environment, Conservation and Parks, Toronto, Ontario, Canada
| | - Paul K Sibley
- School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
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15
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Zubrod JP, Bundschuh M, Arts G, Brühl CA, Imfeld G, Knäbel A, Payraudeau S, Rasmussen JJ, Rohr J, Scharmüller A, Smalling K, Stehle S, Schulz R, Schäfer RB. Fungicides: An Overlooked Pesticide Class? ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:3347-3365. [PMID: 30835448 PMCID: PMC6536136 DOI: 10.1021/acs.est.8b04392] [Citation(s) in RCA: 268] [Impact Index Per Article: 53.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 12/14/2018] [Accepted: 03/05/2019] [Indexed: 05/23/2023]
Abstract
Fungicides are indispensable to global food security and their use is forecasted to intensify. Fungicides can reach aquatic ecosystems and occur in surface water bodies in agricultural catchments throughout the entire growing season due to their frequent, prophylactic application. However, in comparison to herbicides and insecticides, the exposure to and effects of fungicides have received less attention. We provide an overview of the risk of fungicides to aquatic ecosystems covering fungicide exposure (i.e., environmental fate, exposure modeling, and mitigation measures) as well as direct and indirect effects of fungicides on microorganisms, macrophytes, invertebrates, and vertebrates. We show that fungicides occur widely in aquatic systems, that the accuracy of predicted environmental concentrations is debatable, and that fungicide exposure can be effectively mitigated. We additionally demonstrate that fungicides can be highly toxic to a broad range of organisms and can pose a risk to aquatic biota. Finally, we outline central research gaps that currently challenge our ability to predict fungicide exposure and effects, promising research avenues, and shortcomings of the current environmental risk assessment for fungicides.
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Affiliation(s)
- Jochen P. Zubrod
- Institute
for Environmental Sciences, University of
Koblenz-Landau, Fortstraße
7, D-76829 Landau, Germany
- Eußerthal
Ecosystem Research Station, University of
Koblenz-Landau, Birkenthalstraße
13, D-76857 Eußerthal, Germany
| | - Mirco Bundschuh
- Institute
for Environmental Sciences, University of
Koblenz-Landau, Fortstraße
7, D-76829 Landau, Germany
- Department
of Aquatic Sciences and Assessment, Swedish
University of Agricultural Sciences, Lennart Hjelms väg 9, SWE-75007 Uppsala, Sweden
| | - Gertie Arts
- Wageningen
Environmental Research, Wageningen University
and Research, Wageningen, The Netherlands
| | - Carsten A. Brühl
- Institute
for Environmental Sciences, University of
Koblenz-Landau, Fortstraße
7, D-76829 Landau, Germany
| | - Gwenaël Imfeld
- Laboratoire
d’Hydrologie et de Géochimie de Strasbourg (LHyGeS), Université de Strasbourg/ENGEES, CNRS, 1 rue Blessig, 67084 Strasbourg Cedex, France
| | - Anja Knäbel
- Institute
for Environmental Sciences, University of
Koblenz-Landau, Fortstraße
7, D-76829 Landau, Germany
| | - Sylvain Payraudeau
- Laboratoire
d’Hydrologie et de Géochimie de Strasbourg (LHyGeS), Université de Strasbourg/ENGEES, CNRS, 1 rue Blessig, 67084 Strasbourg Cedex, France
| | - Jes J. Rasmussen
- Aarhus
University, Dept. of Bioscience, Vejlsoevej 25, 8600 Silkeborg, Denmark
| | - Jason Rohr
- University
of South Florida, Department of Integrative
Biology, Tampa, Florida, United States
- Department
of Biological Sciences, Environmental Change Initiative, and Eck Institute
for Global Health, University of Notre Dame, Notre Dame, Indiana, United
States
| | - Andreas Scharmüller
- Institute
for Environmental Sciences, University of
Koblenz-Landau, Fortstraße
7, D-76829 Landau, Germany
| | - Kelly Smalling
- U.S.
Geological Survey, New Jersey Water Science
Center, Lawrenceville, New Jersey, United States
| | - Sebastian Stehle
- Institute
for Environmental Sciences, University of
Koblenz-Landau, Fortstraße
7, D-76829 Landau, Germany
- Eußerthal
Ecosystem Research Station, University of
Koblenz-Landau, Birkenthalstraße
13, D-76857 Eußerthal, Germany
| | - Ralf Schulz
- Institute
for Environmental Sciences, University of
Koblenz-Landau, Fortstraße
7, D-76829 Landau, Germany
- Eußerthal
Ecosystem Research Station, University of
Koblenz-Landau, Birkenthalstraße
13, D-76857 Eußerthal, Germany
| | - Ralf B. Schäfer
- Institute
for Environmental Sciences, University of
Koblenz-Landau, Fortstraße
7, D-76829 Landau, Germany
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16
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Konschak M, Zubrod JP, Baudy P, Englert D, Herrmann B, Schulz R, Bundschuh M. Waterborne and diet-related effects of inorganic and organic fungicides on the insect leaf shredder Chaetopteryx villosa (Trichoptera). AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2019; 206:33-42. [PMID: 30445370 DOI: 10.1016/j.aquatox.2018.10.021] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 09/28/2018] [Accepted: 10/27/2018] [Indexed: 06/09/2023]
Abstract
It is well-documented that fungicides can affect crustacean leaf shredders via two effect pathways, namely waterborne exposure and their diet (i.e., via dietary uptake of fungicides adsorbed to leaf material and an altered microorganism-mediated food quality). As a consequence of different life history strategies, the relevance of these effect pathways for aquatic shredders belonging to other taxonomic classes, for instance insects, remains unclear. Therefore, we investigated waterborne and diet-related effects in larvae of the caddisfly leaf shredder Chaetopteryx villosa (Insecta: Trichoptera) and compared our observations to previous reports on effects in adults of the crustacean leaf shredder Gammarus fossarum (Malacostraca: Amphipoda). We assessed acute waterborne effects of an organic fungicide mixture (OFM) and the inorganic fungicide copper (Cu) on the leaf consumption (n = 30) of the fourth-/fifth-instar larvae of C. villosa and their food choice (n = 49) when offered leaf material, which was either conditioned in presence or in absence of the respective fungicide(s). Moreover, the larval leaf consumption (n = 50) and physiological fitness (i.e., growth as well as lipid and protein content) were examined after subjecting C. villosa for 24 days towards the combination of both effect pathways at environmentally relevant concentrations. G. fossarum and C. villosa exhibited similar sensitivities and the same effect direction when exposed to the OFM (either waterborne or dietary pathways). Both shredders also showed the same effect direction when exposed to dietary Cu, while with regards to mortality and leaf consumption C. villosa was less sensitive to waterborne Cu than G. fossarum. Finally, as observed for G. fossarum, the combined exposure to OFM over 24 days negatively affected leaf consumption and the physiology (i.e., growth and lipid reserves) of C. villosa. While no combined Cu effects were observed for larval leaf consumption, contrasting to the observations for G. fossarum, the physiology of both shredders was negatively affected, despite partly differing effect sizes and directions. Our results suggest that C. villosa and G. fossarum are of comparable sensitivity towards waterborne and diet-related organic fungicide exposure, whereas the trichopteran is less sensitive to Cu-based waterborne fungicide exposure. However, when both pathways act jointly, organic and inorganic fungicides can affect the physiology of shredder species with completely different life history strategies. As caddisflies represent a subsidy for terrestrial consumers, these observations indicate that fungicide exposure might not only affect aquatic ecosystem functioning but also the flux of energy across ecosystem boundaries.
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Affiliation(s)
- M Konschak
- Institute for Environmental Sciences, University of Koblenz-Landau, Fortstraße 7, D-76829 Landau, Germany.
| | - J P Zubrod
- Institute for Environmental Sciences, University of Koblenz-Landau, Fortstraße 7, D-76829 Landau, Germany; Eußerthal Ecosystem Research Station, University of Koblenz-Landau, Birkenthalstraße 13, D-76857 Eußerthal, Germany
| | - P Baudy
- Institute for Environmental Sciences, University of Koblenz-Landau, Fortstraße 7, D-76829 Landau, Germany
| | - D Englert
- Institute for Environmental Sciences, University of Koblenz-Landau, Fortstraße 7, D-76829 Landau, Germany
| | - B Herrmann
- Institute for Environmental Sciences, University of Koblenz-Landau, Fortstraße 7, D-76829 Landau, Germany
| | - R Schulz
- Institute for Environmental Sciences, University of Koblenz-Landau, Fortstraße 7, D-76829 Landau, Germany; Eußerthal Ecosystem Research Station, University of Koblenz-Landau, Birkenthalstraße 13, D-76857 Eußerthal, Germany
| | - M Bundschuh
- Institute for Environmental Sciences, University of Koblenz-Landau, Fortstraße 7, D-76829 Landau, Germany; Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Lennart Hjelms väg 9, SWE-75007, Uppsala, Sweden.
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17
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Similar recovery time of microbial functions from fungicide stress across biogeographical regions. Sci Rep 2018; 8:17021. [PMID: 30451978 PMCID: PMC6242862 DOI: 10.1038/s41598-018-35397-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 11/05/2018] [Indexed: 11/09/2022] Open
Abstract
Determining whether the structural and functional stress responses of communities are similar across space and time is paramount for forecasting and extrapolating the consequences of anthropogenic pressures on ecosystems and their services. Stream ecosystems are under high anthropogenic pressure; however, studies have only examined the response of stream communities across large scales over multiple generations. We studied the responses of leaf-associated microbial communities in streams within three European biogeographical regions to chemical stress in a microcosm experiment with multiple cycles of fungicide pollution and resource colonisation. Fungal community composition and the ecosystem function leaf decomposition were measured as response variables. Microbial leaf decomposition showed similar recovery times under environmental levels of fungicide exposure across regions. Initially, the decomposition declined (between 19 and 53%) under fungicide stress and recovered to control levels during the third cycle of pollution and colonisation. Although community composition and its stress response varied between regions, this suggests similar functional community adaptation towards fungicide stress over time. Genetic, epigenetic and physiological adaptations, as well as species turnover, may have contributed to community adaptation but further studies are required to determine if and to which extent these mechanisms are operating. Overall, our findings provide the first evidence of a similar functional response of microbial leaf decomposition to chemical stress across space and time.
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Sanches ALM, Daam MA, Freitas EC, Godoy AA, Meireles G, Almeida AR, Domingues I, Espíndola ELG. Lethal and sublethal toxicity of abamectin and difenoconazole (individually and in mixture) to early life stages of zebrafish. CHEMOSPHERE 2018; 210:531-538. [PMID: 30029145 DOI: 10.1016/j.chemosphere.2018.07.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 07/04/2018] [Accepted: 07/05/2018] [Indexed: 06/08/2023]
Abstract
In recent years, the need for the development of alternative test methods for the conventional acute fish toxicity test (AFT) with adult fish has often been discussed. In addition, concerns have been raised on the potential risks related with environmentally realistic pesticide mixtures since risk evaluations have traditionally been based on individual pesticides. The insecticide/acaricide abamectin and the fungicide difenoconazole are the main pesticides that are intensively used in Brazilian strawberry crop and are hence likely to occur simultaneously in edge-of-field waterbodies. The aim of the present study was therefore to evaluate the lethal and sublethal toxicity of single and mixture exposures of these pesticides to zebrafish early life stages (embryos and juveniles). By comparing the derived toxicity data of the individual compounds with that previously determined for zebrafish adults, the order of life stage sensitivity was juvenile > adult > embryo. The pesticide mixture revealed a dose-level dependent deviation of the independent action model, with antagonism at low dose levels and synergism at high dose levels. Sublethal parameters (especially those related with locomotion) were considerably more sensitive than lethality. Subsequently, the inclusion of sublethal parameters may greatly improve the sensitivity of FET tests and hence its suitability as a substitution of adult fish testing in risk assessment evaluations.
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Affiliation(s)
- Ana Letícia Madeira Sanches
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970 São Carlos, Brazil.
| | - Michiel Adriaan Daam
- CENSE, Department of Environmental Sciences and Engineering, Faculty of Sciences and Technology, New University of Lisbon, Quinta da Torre, 2829-516 Caparica, Portugal
| | - Emanuela Cristina Freitas
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970 São Carlos, Brazil
| | - Aline Andrade Godoy
- Department of Clinical and Toxicological Analysis, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Gabriela Meireles
- School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, 14040-903 Ribeirão Preto, São Paulo, Brazil
| | - Ana Rita Almeida
- Department of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Inês Domingues
- Department of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal
| | - Evaldo Luiz Gaeta Espíndola
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970 São Carlos, Brazil
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Echeverría-Sáenz S, Mena F, Arias-Andrés M, Vargas S, Ruepert C, Van den Brink PJ, Castillo LE, Gunnarsson JS. In situ toxicity and ecological risk assessment of agro-pesticide runoff in the Madre de Dios River in Costa Rica. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:13270-13282. [PMID: 27757743 DOI: 10.1007/s11356-016-7817-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 10/03/2016] [Indexed: 06/06/2023]
Abstract
The River Madre de Dios (RMD) and its lagoon is a biodiversity rich watershed formed by a system of streams, rivers, channels, and a coastal lagoon communicating with the Caribbean Sea. This basin sustains a large area of agricultural activity (mostly banana, rice, and pineapple) with intensive use of pesticides, continually detected in water samples. We investigated in situ the toxicological effects caused by pesticide runoff from agriculture and the relation of pesticide concentrations with different biological organization levels: early responses in fish biomarkers (sub-organismal), acute toxicity to Daphnia magna (organismal), and aquatic macroinvertebrate community structure. The evaluation was carried out between October 2011 and November 2012 at five sites along the RMD influenced by agricultural discharges and a reference site in a stream outside the RMD that receives less pesticides. Acute toxicity to D. magna was observed only once in a sample from the RMD (Caño Azul); the index of biomarker responses in fish exposed in situ was higher than controls at the same site and at the RMD-Freeman. However, only macroinvertebrates were statistically related to the presence of pesticides, combined with both physical-chemical parameters and habitat degradation. All three groups of variables determined the distribution of macroinvertebrate taxa through the study sites.
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Affiliation(s)
- Silvia Echeverría-Sáenz
- Central American Institute for Studies in Toxic Substances (IRET), Universidad Nacional, P.O. Box 86-3000, Heredia, Costa Rica.
| | - Freylan Mena
- Central American Institute for Studies in Toxic Substances (IRET), Universidad Nacional, P.O. Box 86-3000, Heredia, Costa Rica
| | - María Arias-Andrés
- Central American Institute for Studies in Toxic Substances (IRET), Universidad Nacional, P.O. Box 86-3000, Heredia, Costa Rica
| | - Seiling Vargas
- Central American Institute for Studies in Toxic Substances (IRET), Universidad Nacional, P.O. Box 86-3000, Heredia, Costa Rica
| | - Clemens Ruepert
- Central American Institute for Studies in Toxic Substances (IRET), Universidad Nacional, P.O. Box 86-3000, Heredia, Costa Rica
| | - Paul J Van den Brink
- Department of Aquatic Ecology and Water Quality Management, Wageningen University, P.O. Box 47, 6700 AA, Wageningen, The Netherlands
- Alterra, Wageningen University and Research centre, P.O. Box 47, 6700 AA, Wageningen, The Netherlands
| | - Luisa E Castillo
- Central American Institute for Studies in Toxic Substances (IRET), Universidad Nacional, P.O. Box 86-3000, Heredia, Costa Rica
| | - Jonas S Gunnarsson
- Department of Ecology, Environment and Plant Sciences (DEEP), Stockholm University, SE-106 91, Stockholm, Sweden
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20
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Saraiva AS, Sarmento RA, Golovko O, Randak T, Pestana JLT, Soares AMVM. Lethal and sub-lethal effects of cyproconazole on freshwater organisms: a case study with Chironomus riparius and Dugesia tigrina. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:12169-12176. [PMID: 29455353 DOI: 10.1007/s11356-017-1180-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 12/28/2017] [Indexed: 06/08/2023]
Abstract
The fungicide cyproconazole (CPZ) inhibits the biosynthesis of ergosterol, an essential sterol component in fungal cell membrane and can also affect non-target organisms by its inhibitory effects on P450 monooxygenases. The predicted environmental concentration of CPZ is up to 49.05 μg/L and 145.89 μg/kg in surface waters and sediments, respectively, and information about CPZ toxicity towards non-target aquatic organisms is still limited. This study aimed to address the lack of ecotoxicological data for CPZ, and thus, an evaluation of the lethal and sub-lethal effects of CPZ was performed using two freshwater invertebrates (the midge Chironomus riparius and the planarian Dugesia tigrina). The estimated CPZ 48 h LC50 (95% CI) was 17.46 mg/L for C. riparius and 47.38 mg/L for D. tigrina. The emergence time (EmT50) of C. riparius was delayed by CPZ exposure from 0.76 mg/L. On the other hand, planarians showed higher tolerance to CPZ exposure. Sub-lethal effects of CPZ on planarians included reductions in locomotion (1.8 mg/L), delayed photoreceptors regeneration (from 0.45 mg/L), and feeding inhibition (5.6 mg/L). Our results confirm the moderate toxicity of CPZ towards aquatic invertebrates but sub-lethal effects observed also suggest potential chronic effects of CPZ with consequences for population dynamics.
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Affiliation(s)
- Althiéris S Saraiva
- Departamento de Agropecuária (Conservação de Agroecossistemas e Ecotoxicologia), Instituto Federal de Educação, Ciência e Tecnologia Goiano - campus Campos Belos, Campos Belos, Goiás, 73840-000, Brazil
- Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins, Campus Universitário de Gurupi, Gurupi, Tocantins, 77402-970, Brazil
| | - Renato A Sarmento
- Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins, Campus Universitário de Gurupi, Gurupi, Tocantins, 77402-970, Brazil.
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal.
| | - Oksana Golovko
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in Ceske Budejovice, Zatisi 728/II, 389 25, Vodnany, Czech Republic
| | - Tomas Randak
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in Ceske Budejovice, Zatisi 728/II, 389 25, Vodnany, Czech Republic
| | - João L T Pestana
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
| | - Amadeu M V M Soares
- Programa de Pós-Graduação em Produção Vegetal, Universidade Federal do Tocantins, Campus Universitário de Gurupi, Gurupi, Tocantins, 77402-970, Brazil
- Departamento de Biologia & CESAM, Universidade de Aveiro, Campus Universitário de Santiago, 3810-193, Aveiro, Portugal
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21
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Sanches ALM, Vieira BH, Reghini MV, Moreira RA, Freitas EC, Espíndola ELG, Daam MA. Single and mixture toxicity of abamectin and difenoconazole to adult zebrafish (Danio rerio). CHEMOSPHERE 2017; 188:582-587. [PMID: 28917210 DOI: 10.1016/j.chemosphere.2017.09.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 09/05/2017] [Accepted: 09/06/2017] [Indexed: 06/07/2023]
Abstract
Concerns have been raised in recent years on the potential risks related with pesticide mixtures that are likely to be present in agricultural edge-of-field waterbodies. Despite the high use of pesticides in tropical countries like Brazil, studies evaluating pesticide mixtures are especially scarce in the tropics. The insecticide abamectin and the fungicide difenoconazole are the main pesticides intensively used in Brazilian strawberry crop and are hence likely to occur simultaneously. The aim of the present study was therefore to evaluate the toxicity of abamectin, difenoconazole and their mixture to the tropical fish Danio rerio. Laboratory toxicity tests with the individual pesticides indicated 48 h-LC50 values of 59 μg L-1 for abamectin and 1.4 mg L-1 for difenoconazole. Mixtures of the two pesticides revealed a synergistic deviation of the independent action model. Implications of study findings for the aquatic risk assessment of pesticide mixtures, especially in tropical countries and indications for future research are discussed.
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Affiliation(s)
- Ana Letícia Madeira Sanches
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970 São Carlos, Brazil.
| | - Bruna Horvath Vieira
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970 São Carlos, Brazil
| | - Marina Vanderlei Reghini
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970 São Carlos, Brazil
| | - Raquel Aparecida Moreira
- Department of Ecology and Evolutionary Biology, Federal University of São Carlos, Rodovia Washington Luis, Km 235, 13565-905, São Carlos, SP, Brazil
| | - Emanuela Cristina Freitas
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970 São Carlos, Brazil
| | - Evaldo L G Espíndola
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970 São Carlos, Brazil
| | - Michiel A Daam
- NEEA/CRHEA/SHS, São Carlos Engineering School, University of São Paulo, Av. Trabalhador São Carlense, 400, 13.560-970 São Carlos, Brazil; CENSE, Department of Environmental Sciences and Engineering, Faculty of Sciences and Technology, New University of Lisbon, Quinta da Torre, 2829-516 Caparica, Portugal
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22
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Münze R, Hannemann C, Orlinskiy P, Gunold R, Paschke A, Foit K, Becker J, Kaske O, Paulsson E, Peterson M, Jernstedt H, Kreuger J, Schüürmann G, Liess M. Pesticides from wastewater treatment plant effluents affect invertebrate communities. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 599-600:387-399. [PMID: 28478367 DOI: 10.1016/j.scitotenv.2017.03.008] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 03/01/2017] [Accepted: 03/01/2017] [Indexed: 06/07/2023]
Abstract
We quantified pesticide contamination and its ecological impact up- and downstream of seven wastewater treatment plants (WWTPs) in rural and suburban areas of central Germany. During two sampling campaigns, time-weighted average pesticide concentrations (cTWA) were obtained using Chemcatcher® passive samplers; pesticide peak concentrations were quantified with event-driven samplers. At downstream sites, receiving waters were additionally grab sampled for five selected pharmaceuticals. Ecological effects on macroinvertebrate structure and ecosystem function were assessed using the biological indicator system SPEARpesticides (SPEcies At Risk) and leaf litter breakdown rates, respectively. WWTP effluents substantially increased insecticide and fungicide concentrations in receiving waters; in many cases, treated wastewater was the exclusive source for the neonicotinoid insecticides acetamiprid and imidacloprid in the investigated streams. During the ten weeks of the investigation, five out of the seven WWTPs increased in-stream pesticide toxicity by a factor of three. As a consequence, at downstream sites, SPEAR values and leaf litter degradation rates were reduced by 40% and 53%, respectively. The reduced leaf litter breakdown was related to changes in the macroinvertebrate communities described by SPEARpesticides and not to altered microbial activity. Neonicotinoids showed the highest ecological relevance for the composition of invertebrate communities, occasionally exceeding the Regulatory Acceptable Concentrations (RACs). In general, considerable ecological effects of insecticides were observed above and below regulatory thresholds. Fungicides, herbicides and pharmaceuticals contributed only marginally to acute toxicity. We conclude that pesticide retention of WWTPs needs to be improved.
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Affiliation(s)
- Ronald Münze
- UFZ - Helmholtz Centre for Environmental Research, Department System-Ecotoxicology, Permoserstr. 15, 04318 Leipzig, Germany; TU Bergakademie Freiberg, Institute of Biosciences, Leipziger Straße 29, 09596 Freiberg, Germany
| | - Christin Hannemann
- Brandenburg State Office of the Environment, Department of Water Management - River Basin Management, Seeburger Chaussee 2, 14476 Potsdam, Germany
| | - Polina Orlinskiy
- UFZ - Helmholtz Centre for Environmental Research, Department System-Ecotoxicology, Permoserstr. 15, 04318 Leipzig, Germany; University of Koblenz-Landau, Institute of Environmental Sciences, Fortstraße 7, 76829 Landau, Germany
| | - Roman Gunold
- UFZ - Helmholtz Centre for Environmental Research, Department of Ecological Chemistry, Permoserstr. 15, 04318 Leipzig, Germany; TU Bergakademie Freiberg, Institute of Organic Chemistry, Leipziger Straße 29, 09596 Freiberg, Germany
| | - Albrecht Paschke
- UFZ - Helmholtz Centre for Environmental Research, Department of Ecological Chemistry, Permoserstr. 15, 04318 Leipzig, Germany
| | - Kaarina Foit
- UFZ - Helmholtz Centre for Environmental Research, Department System-Ecotoxicology, Permoserstr. 15, 04318 Leipzig, Germany
| | - Jeremias Becker
- UFZ - Helmholtz Centre for Environmental Research, Department System-Ecotoxicology, Permoserstr. 15, 04318 Leipzig, Germany
| | - Oliver Kaske
- UFZ - Helmholtz Centre for Environmental Research, Department System-Ecotoxicology, Permoserstr. 15, 04318 Leipzig, Germany
| | - Elin Paulsson
- Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment, Lennart Hjelms väg 9, 75007 Uppsala, Sweden
| | - Märit Peterson
- Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment, Lennart Hjelms väg 9, 75007 Uppsala, Sweden
| | - Henrik Jernstedt
- Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment, Lennart Hjelms väg 9, 75007 Uppsala, Sweden
| | - Jenny Kreuger
- Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment, Lennart Hjelms väg 9, 75007 Uppsala, Sweden
| | - Gerrit Schüürmann
- UFZ - Helmholtz Centre for Environmental Research, Department of Ecological Chemistry, Permoserstr. 15, 04318 Leipzig, Germany; TU Bergakademie Freiberg, Institute of Organic Chemistry, Leipziger Straße 29, 09596 Freiberg, Germany
| | - Matthias Liess
- UFZ - Helmholtz Centre for Environmental Research, Department System-Ecotoxicology, Permoserstr. 15, 04318 Leipzig, Germany; RWTH Aachen University, Institute for Environmental Research (Biology V), Worringerweg 1, 52074 Aachen, Germany.
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23
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Kunz JL, Ingersoll CG, Smalling KL, Elskus AA, Kuivila KM. Chronic toxicity of azoxystrobin to freshwater amphipods, midges, cladocerans, and mussels in water-only exposures. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:2308-2315. [PMID: 28181697 DOI: 10.1002/etc.3764] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2015] [Revised: 02/12/2016] [Accepted: 02/08/2017] [Indexed: 05/26/2023]
Abstract
Understanding the effects of fungicides on nontarget organisms at realistic concentrations and exposure durations is vital for determining potential impacts on aquatic ecosystems. Environmental concentrations of the fungicide azoxystrobin have been reported up to 4.6 μg/L in the United States and 30 μg/L in Europe. The objective of the present study was to evaluate the chronic toxicity of azoxystrobin in water-only exposures with an amphipod (Hyalella azteca; 42-d exposure), a midge (Chironomus dilutus; 50-d exposure), a cladoceran (Ceriodaphnia dubia; 7-d exposure), and a unionid mussel (Lampsilis siliquoidea; 28-d exposure) at environmentally relevant concentrations. The potential photo-enhanced toxicity of azoxystrobin accumulated by C. dubia and L. siliquoidea following chronic exposures to azoxystrobin was also evaluated. The 20% effect concentrations (EC20s) based on the most sensitive endpoint were 4.2 μg/L for H. azteca reproduction, 12 μg/L for C. dubia reproduction and C. dilutus emergence, and >28 μg/L for L. siliquoidea. Hyalella azteca was more sensitive to azoxystrobin compared with the other 3 species in the chronic exposures. No photo-enhanced toxicity was observed for either C. dubia or L. siliquoidea exposed to ultraviolet light in control water following azoxystrobin tests. The results of the present study indicate chronic effects of azoxystrobin on 3 of 4 invertebrates tested at environmentally relevant concentrations. The changes noted in biomass and reproduction have the potential to alter the rate of ecological processes driven by aquatic invertebrates. Environ Toxicol Chem 2017;36:2308-2315. Published 2017 Wiley Periodicals Inc. on behalf of SETAC. This article is a US government work and, as such, is in the public domain in the United States of America.
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24
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Zubrod JP, Englert D, Wolfram J, Rosenfeldt RR, Feckler A, Bundschuh R, Seitz F, Konschak M, Baudy P, Lüderwald S, Fink P, Lorke A, Schulz R, Bundschuh M. Long-term effects of fungicides on leaf-associated microorganisms and shredder populations-an artificial stream study. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:2178-2189. [PMID: 28160498 DOI: 10.1002/etc.3756] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 10/10/2016] [Accepted: 02/02/2017] [Indexed: 06/06/2023]
Abstract
Leaf litter is a major source of carbon and energy for stream food webs, while both leaf-decomposing microorganisms and macroinvertebrate leaf shredders can be affected by fungicides. Despite the potential for season-long fungicide exposure for these organisms, however, such chronic exposures have not yet been considered. Using an artificial stream facility, effects of a chronic (lasting up to 8 wk) exposure to a mixture of 5 fungicides (sum concentration 20 μg/L) on leaf-associated microorganisms and the key leaf shredder Gammarus fossarum were therefore assessed. While bacterial density and microorganism-mediated leaf decomposition remained unaltered, fungicide exposure reduced fungal biomass (≤71%) on leaves from day 28 onward. Gammarids responded to the combined stress from consumption of fungicide-affected leaves and waterborne exposure with a reduced abundance (≤18%), which triggered reductions in final population biomass (18%) and in the number of precopula pairs (≤22%) but could not fully explain the decreased leaf consumption (19%), lipid content (≤43%; going along with an altered composition of fatty acids), and juvenile production (35%). In contrast, fine particulate organic matter production and stream respiration were unaffected. Our results imply that long-term exposure of leaf-associated fungi and shredders toward fungicides may result in detrimental implications in stream food webs and impairments of detrital material fluxes. These findings render it important to understand decomposer communities' long-term adaptational capabilities to ensure that functional integrity is safeguarded. Environ Toxicol Chem 2017;36:2178-2189. © 2017 SETAC.
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Affiliation(s)
- Jochen P Zubrod
- Institute for Environmental Sciences, University of Koblenz-Landau, Landau, Germany
| | - Dominic Englert
- Institute for Environmental Sciences, University of Koblenz-Landau, Landau, Germany
| | - Jakob Wolfram
- Institute for Environmental Sciences, University of Koblenz-Landau, Landau, Germany
| | - Ricki R Rosenfeldt
- Institute for Environmental Sciences, University of Koblenz-Landau, Landau, Germany
- nEcoTox, Schifferstadt, Germany
| | - Alexander Feckler
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Rebecca Bundschuh
- Institute for Environmental Sciences, University of Koblenz-Landau, Landau, Germany
| | - Frank Seitz
- Institute for Environmental Sciences, University of Koblenz-Landau, Landau, Germany
- nEcoTox, Schifferstadt, Germany
| | - Marco Konschak
- Institute for Environmental Sciences, University of Koblenz-Landau, Landau, Germany
| | - Patrick Baudy
- Institute for Environmental Sciences, University of Koblenz-Landau, Landau, Germany
| | - Simon Lüderwald
- Institute for Environmental Sciences, University of Koblenz-Landau, Landau, Germany
| | - Patrick Fink
- Cologne Biocenter, University of Cologne, Cologne, Germany
| | - Andreas Lorke
- Institute for Environmental Sciences, University of Koblenz-Landau, Landau, Germany
| | - Ralf Schulz
- Institute for Environmental Sciences, University of Koblenz-Landau, Landau, Germany
| | - Mirco Bundschuh
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Uppsala, Sweden
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25
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Vu HT, Keough MJ, Long SM, Pettigrove VJ. Effects of two commonly used fungicides on the amphipod Austrochiltonia subtenuis. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2017; 36:720-726. [PMID: 27530466 DOI: 10.1002/etc.3584] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Revised: 05/18/2016] [Accepted: 08/12/2016] [Indexed: 06/06/2023]
Abstract
Fungicides are used widely in agriculture and have been detected in adjacent rivers and wetlands. However, relatively little is known about the potential effects of fungicides on aquatic organisms. The present study investigated the effects of 2 commonly used fungicides, the boscalid fungicide Filan® and the myclobutanil fungicide Systhane™ 400 WP, on life history traits (survival, growth, and reproduction) and energy reserves (lipid, protein, and glycogen content) of the amphipod Austrochiltonia subtenuis under laboratory conditions, at concentrations detected in aquatic environments. Amphipods were exposed to 3 concentrations of Filan (1 μg active ingredient [a.i.]/L, 10 μg a.i./L, and 40 μg a.i./L) and Systhane (0.3 μg a.i./L, 3 μg a.i./L, and 30 μg a.i./L) over 56 d. Both fungicides had similar effects on the amphipod at the organism level. Reproduction was the most sensitive endpoint, with offspring produced in controls but none produced in any of the fungicide treatments, and total numbers of gravid females in all fungicide treatments were reduced by up to 95%. Female amphipods were more sensitive than males in terms of growth. Systhane had significant effects on survival at all concentrations, whereas significant effects of Filan on survival were observed only at 10 μg a.i./L and 40 μg a.i./L. The effects of fungicides on energy reserves of the female amphipod were different. Filan significantly reduced amphipod protein content, whereas Systhane significantly reduced the lipid content. The present study demonstrates wide-ranging effects of 2 common fungicides on an ecologically important species that has a key role in trophic transfer and nutrient recycling in aquatic environments. These results emphasize the importance of considering the long-term effects of fungicides in the risk assessment of aquatic ecosystems. Environ Toxicol Chem 2017;36:720-726. © 2016 SETAC.
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Affiliation(s)
- Hung T Vu
- Centre for Aquatic Pollution Identification and Management (CAPIM), School of BioSciences, The University of Melbourne, Victoria, Australia
| | - Michael J Keough
- Centre for Aquatic Pollution Identification and Management (CAPIM), School of BioSciences, The University of Melbourne, Victoria, Australia
| | - Sara M Long
- Centre for Aquatic Pollution Identification and Management (CAPIM), School of BioSciences, The University of Melbourne, Victoria, Australia
| | - Vincent J Pettigrove
- Centre for Aquatic Pollution Identification and Management (CAPIM), School of BioSciences, The University of Melbourne, Victoria, Australia
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26
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Elskus AA, Smalling KL, Hladik ML, Kuivila KM. Effects of two fungicide formulations on microbial and macroinvertebrate leaf decomposition under laboratory conditions. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2016; 35:2834-2844. [PMID: 27110671 DOI: 10.1002/etc.3465] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Revised: 11/21/2015] [Accepted: 04/21/2016] [Indexed: 06/05/2023]
Abstract
Aquatic fungi contribute significantly to the decomposition of leaves in streams, a key ecosystem service. Little is known, however, about the effects of fungicides on aquatic fungi and macroinvertebrates involved with leaf decomposition. Red maple (Acer rubrum) leaves were conditioned in a stream to acquire microbes (bacteria and fungi) or leached in tap water (unconditioned) to simulate potential reduction of microbial biomass by fungicides. Conditioned leaves were exposed to fungicide formulations QUILT (azoxystrobin + propiconazole) or PRISTINE (boscalid + pyraclostrobin) in the presence and absence of the leaf shredder, Hyalella azteca (amphipods; 7-d old at start of exposures) for 14 d at 23 °C. The QUILT formulations (∼0.3 μg/L, 1.8 μg/L, and 8 μg/L) tended to increase leaf decomposition by amphipods (not significant) without a concomitant increase in amphipod biomass, indicating potential increased consumption of leaves with reduced nutritional value. The PRISTINE formulation (∼33 μg/L) significantly reduced amphipod growth and biomass (p < 0.05), effects similar to those observed with unconditioned controls. The significant suppressive effects of PRISTINE on amphipod growth and the trend toward increased leaf decomposition with increasing QUILT concentration indicate the potential for altered leaf decay in streams exposed to fungicides. Further work is needed to evaluate fungicide effects on leaf decomposition under conditions relevant to stream ecosystems, including temperature shifts and pulsed exposures to pesticide mixtures. Environ Toxicol Chem 2016;35:2834-2844. Published 2016 Wiley Periodicals Inc. on behalf of SETAC. This article is a US Government work and, as such, is in the public domain in the United States of America.
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Affiliation(s)
- Adria A Elskus
- US Geological Survey, Leetown Science Center, Maine Field Office, University of Maine, Orono, Maine.
| | - Kelly L Smalling
- US Geological Survey, New Jersey Water Science Center, Lawrenceville, New Jersey
| | - Michelle L Hladik
- US Geological Survey, California Water Science Center, Sacramento, California
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27
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Fernández D, Tummala M, Schreiner VC, Duarte S, Pascoal C, Winkelmann C, Mewes D, Muñoz K, Schäfer RB. Does nutrient enrichment compensate fungicide effects on litter decomposition and decomposer communities in streams? AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2016; 174:169-178. [PMID: 26963520 DOI: 10.1016/j.aquatox.2016.02.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2015] [Revised: 02/20/2016] [Accepted: 02/24/2016] [Indexed: 06/05/2023]
Abstract
Nutrient and pesticide pollution are widespread agricultural stressors. Fungicides may affect freshwater fungi, which play an important role in litter decomposition (LD), whereas moderate nutrient enrichment can stimulate LD. We examined potential interaction effects of nutrients and fungicides on decomposer communities and LD in a 14-day two-factorial (fungicide and nutrient treatments) mesocosm experiment. Fungicide exposure was limited to 4days to simulate episodic contamination. Only the microbial community responded significantly to the experimental factors, though non-significant increases >20% were found for invertebrate decomposer weight gain and LD under high-nutrient conditions. Fungal community structure responded more strongly to fungicides than sporulation. Sporulation responded strongest to nutrients. Bacterial community structure was affected by both factors, although only nutrients influenced bacterial density. Our results suggest effects from fungicides at field-relevant levels on the microbial community. Whether these changes propagate to invertebrate communities and LD remains unclear and should be analysed under longer and recurrent fungicide exposure.
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Affiliation(s)
- Diego Fernández
- Institute for Environmental Sciences, University Koblenz-Landau, Fortstraße 7, 76829 Landau in der Pfalz, Germany.
| | - Mallikarjun Tummala
- Institute for Environmental Sciences, University Koblenz-Landau, Fortstraße 7, 76829 Landau in der Pfalz, Germany
| | - Verena C Schreiner
- Institute for Environmental Sciences, University Koblenz-Landau, Fortstraße 7, 76829 Landau in der Pfalz, Germany
| | - Sofia Duarte
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Cláudia Pascoal
- Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Carola Winkelmann
- Department of Biology, Institute for Integrated Natural Sciences, University of Koblenz-Landau, Universitätstraße 1, 56070 Koblenz, Germany
| | - Daniela Mewes
- Department of Biology, Institute for Integrated Natural Sciences, University of Koblenz-Landau, Universitätstraße 1, 56070 Koblenz, Germany
| | - Katherine Muñoz
- Institute for Environmental Sciences, University Koblenz-Landau, Fortstraße 7, 76829 Landau in der Pfalz, Germany
| | - Ralf B Schäfer
- Institute for Environmental Sciences, University Koblenz-Landau, Fortstraße 7, 76829 Landau in der Pfalz, Germany
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28
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Hughes SR, Kay P, Brown LE. Impact of anti-inflammatories, beta-blockers and antibiotics on leaf litter breakdown in freshwaters. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:3956-3962. [PMID: 26635223 PMCID: PMC4737798 DOI: 10.1007/s11356-015-5798-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 11/10/2015] [Indexed: 06/05/2023]
Abstract
Pharmaceuticals are now recognised as important pollutants in freshwater systems, but a shortcoming of effects studies is that they have focused on structural endpoints and impacts on ecosystem functioning are poorly understood. The decomposition of organic matter is an important functional process in aquatic systems, and it is known that this can be impacted by the presence of pollutants. Previous studies on leaf litter breakdown have only considered the effects of antibiotics and not other groups of drugs though. The current study investigated the effects of anti-inflammatories, a beta-blocker and an antibiotic on microbially mediated breakdown of leaf litter in the laboratory; colonisation of leaf packs by benthic macroinvertebrates when placed in a stream; and shredding of leaf litter by these organisms. Furthermore, the effects of single compounds relative to their mixture were assessed. It was found that exposure of leaf litter to the study compounds did not influence its breakdown by microbes in the laboratory or macroinvertebrates in a stream. Exposure of leaf litter to pharmaceuticals also had no effect on its colonisation by macroinvertebrates in this study. Many unknowns remain, however, and further studies of the effects of pharmaceuticals on structural and functional endpoints are needed to aid aquatic conservation.
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Affiliation(s)
- S R Hughes
- School of Geography/water@leeds, University of Leeds, Leeds, West Yorkshire, LS2 9JT, UK
- JBA Consulting Ltd, The Old School House, St Joseph's Street, Tadcaster, North Yorkshire, UK
| | - P Kay
- School of Geography/water@leeds, University of Leeds, Leeds, West Yorkshire, LS2 9JT, UK.
| | - L E Brown
- School of Geography/water@leeds, University of Leeds, Leeds, West Yorkshire, LS2 9JT, UK
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29
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Abelho M, Martins TF, Shinn C, Moreira-Santos M, Ribeiro R. Effects of the fungicide pyrimethanil on biofilm and organic matter processing in outdoor lentic mesocosms. ECOTOXICOLOGY (LONDON, ENGLAND) 2016; 25:121-131. [PMID: 26496930 DOI: 10.1007/s10646-015-1574-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/16/2015] [Indexed: 06/05/2023]
Abstract
The effect of the fungicide pyrimethanil (0.7 mg L(−1)) on biofilm development and alder leaf litter decomposition in aquatic ecosystems was assessed in outdoor lentic mesocosms immediately and 274 days after pyrimethanil application. Pyrimethanil decreased ergosterol concentrations (an indicator of fungal biomass) and the abundance and richness of the macroinvertebrate community associated with decomposing leaves. However, because neither fungi nor macroinvertebrates were main factors contributing to decomposition in this particular system, organic matter processing rates were not affected. After 274 days, pyrimethanil concentration in the water column was ≤0.004 mg L(−1) but richness, biomass and composition of the invertebrate community associated with decomposing leaf-litter still showed the effect. The comparison of ergosterol (a molecule existing on both algae and fungal cell membranes), with chlorophyll (an indicator of algal biomass) associated with biofilm suggests that pyrimethanil may decrease fungal biomass and alter the relative abundance of algae and fungi on biofilm developing in control- and treated-mesocosms.
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30
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Münze R, Orlinskiy P, Gunold R, Paschke A, Kaske O, Beketov MA, Hundt M, Bauer C, Schüürmann G, Möder M, Liess M. Pesticide impact on aquatic invertebrates identified with Chemcatcher® passive samplers and the SPEAR(pesticides) index. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 537:69-80. [PMID: 26282741 DOI: 10.1016/j.scitotenv.2015.07.012] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 07/03/2015] [Accepted: 07/03/2015] [Indexed: 06/04/2023]
Abstract
Pesticides negatively affect biodiversity and ecosystem function in aquatic environments. In the present study, we investigated the effects of pesticides on stream macroinvertebrates at 19 sites in a rural area dominated by forest cover and arable land in Central Germany. Pesticide exposure was quantified with Chemcatcher® passive samplers equipped with a diffusion-limiting membrane. Ecological effects on macroinvertebrate communities and on the ecosystem function detritus breakdown were identified using the indicator system SPEARpesticides and the leaf litter degradation rates, respectively. A decrease in the abundance of pesticide-vulnerable taxa and a reduction in leaf litter decomposition rates were observed at sites contaminated with the banned insecticide Carbofuran (Toxic Units≥-2.8), confirming the effect thresholds from previous studies. The results show that Chemcatcher® passive samplers with a diffusion-limiting membrane reliably detect ecologically relevant pesticide pollution, and we suggest Chemcatcher® passive samplers and SPEARpesticides as a promising combination to assess pesticide exposure and effects in rivers and streams.
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Affiliation(s)
- Ronald Münze
- UFZ - Helmholtz Centre for Environmental Research, Department System Ecotoxicology, Permoserstr.15, 04318 Leipzig, Germany; TU Bergakademie Freiberg, Institute of Biosciences, Leipziger Straße 29, 09596 Freiberg, Germany
| | - Polina Orlinskiy
- UFZ - Helmholtz Centre for Environmental Research, Department of Bioenergy, Permoserstr.15, 04318 Leipzig, Germany; University of Koblenz-Landau, Institute of Environmental Sciences, Fortstraße 7, 76829 Landau, Germany
| | - Roman Gunold
- UFZ - Helmholtz Centre for Environmental Research, Department of Ecological Chemistry, Permoserstr.15, 04318 Leipzig, Germany; TU Bergakademie Freiberg, Institute of Organic Chemistry, Leipziger Straße 29, 09596 Freiberg, Germany
| | - Albrecht Paschke
- UFZ - Helmholtz Centre for Environmental Research, Department of Ecological Chemistry, Permoserstr.15, 04318 Leipzig, Germany
| | - Oliver Kaske
- UFZ - Helmholtz Centre for Environmental Research, Department System Ecotoxicology, Permoserstr.15, 04318 Leipzig, Germany
| | - Mikhail A Beketov
- UFZ - Helmholtz Centre for Environmental Research, Department System Ecotoxicology, Permoserstr.15, 04318 Leipzig, Germany
| | - Matthias Hundt
- University of Koblenz-Landau, Institute of Environmental Sciences, Fortstraße 7, 76829 Landau, Germany
| | - Coretta Bauer
- UFZ - Helmholtz Centre for Environmental Research, Department of Analytical Chemistry, Permoserstr.15, 04318 Leipzig, Germany
| | - Gerrit Schüürmann
- UFZ - Helmholtz Centre for Environmental Research, Department of Ecological Chemistry, Permoserstr.15, 04318 Leipzig, Germany; TU Bergakademie Freiberg, Institute of Organic Chemistry, Leipziger Straße 29, 09596 Freiberg, Germany
| | - Monika Möder
- UFZ - Helmholtz Centre for Environmental Research, Department of Analytical Chemistry, Permoserstr.15, 04318 Leipzig, Germany
| | - Matthias Liess
- UFZ - Helmholtz Centre for Environmental Research, Department System Ecotoxicology, Permoserstr.15, 04318 Leipzig, Germany; RWTH Aachen University, Institute for Environmental Research (Biology V), Worringerweg 1, 52074 Aachen, Germany.
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31
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Fernández D, Voss K, Bundschuh M, Zubrod JP, Schäfer RB. Effects of fungicides on decomposer communities and litter decomposition in vineyard streams. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 533:40-8. [PMID: 26150306 DOI: 10.1016/j.scitotenv.2015.06.090] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 06/22/2015] [Accepted: 06/22/2015] [Indexed: 05/21/2023]
Abstract
Large amounts of fungicides are applied globally and partly enter freshwater ecosystems. A few laboratory studies examined their effects on decomposer communities and the ecosystem process of litter decomposition (LD), whereas the field situation remains largely unknown. We conducted a field study with 17 stream sites in a German vineyard area where fungicides represent the dominant pest control agent. Passive samplers were used to monitor 15 fungicides and 4 insecticides in streams and their toxicity was described using the toxic unit approach, whereas sediment samples were taken to characterise total copper concentrations. Microbial and leaf-shredding invertebrate community composition and related LD rates were assessed at each site. The structure of microbial and shredder communities as well as fungal biomass changed along the fungicide toxicity gradient. The changes in microbial endpoints were associated with a reduction of microbial LD rate of up to 40% in polluted streams. By contrast, neither the invertebrate LD rate nor in-situ measured gammarid feeding rates correlated with fungicide toxicity, but both were negatively associated with sediment copper concentrations. A subsequent laboratory experiment employing field fungicide concentrations suggested that the microbial community changes are causal. Overall, our results suggest that fungicides can affect LD under field conditions.
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Affiliation(s)
- Diego Fernández
- Institute for Environmental Sciences, University Koblenz-Landau, Fortstrasse 7, 76829 Landau in der Pfalz, Germany.
| | - Katharina Voss
- Institute for Environmental Sciences, University Koblenz-Landau, Fortstrasse 7, 76829 Landau in der Pfalz, Germany
| | - Mirco Bundschuh
- Institute for Environmental Sciences, University Koblenz-Landau, Fortstrasse 7, 76829 Landau in der Pfalz, Germany; Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Lennart Hjelms väg 9, SWE-75007 Uppsala, Sweden
| | - Jochen P Zubrod
- Institute for Environmental Sciences, University Koblenz-Landau, Fortstrasse 7, 76829 Landau in der Pfalz, Germany
| | - Ralf B Schäfer
- Institute for Environmental Sciences, University Koblenz-Landau, Fortstrasse 7, 76829 Landau in der Pfalz, Germany
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32
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Feckler A, Kahlert M, Bundschuh M. Impacts of Contaminants on the Ecological Role of Lotic Biofilms. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2015; 95:421-427. [PMID: 26323237 DOI: 10.1007/s00128-015-1642-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 08/22/2015] [Indexed: 06/04/2023]
Abstract
Biofilms play a fundamental ecological role in freshwater ecosystems as they contribute to ecosystem function(s) such as autotrophic primary production, organic matter decomposition and the bottom-up directed energy transfer in the food web. The present focused review summarizes the scientific knowledge on how the roles of autotrophic and heterotrophic biofilms can be modulated as a response to chemical (i.e., pesticide) stress. We discuss how horizontal effects (alterations in the structure of biofilms) can affect the physiological fitness and life history strategy of the next trophic level (vertical effects), namely primary consumers. Since the literature indicates that heterotrophic biofilms are currently at risk as a result of pesticide stress, the protectiveness of environmental risk assessment in Europe as well as North America is questioned. By briefly outlining substantial knowledge gaps, we provide ideas on how the identified uncertainties may be empirically addressed.
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Affiliation(s)
- Alexander Feckler
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Box 7050, 750 07, Uppsala, Sweden.
| | - Maria Kahlert
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Box 7050, 750 07, Uppsala, Sweden
| | - Mirco Bundschuh
- Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Box 7050, 750 07, Uppsala, Sweden
- Institute for Environmental Sciences, University of Koblenz-Landau, Fortstraße 7, 76829, Landau, Germany
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33
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Zubrod JP, Englert D, Feckler A, Koksharova N, Konschak M, Bundschuh R, Schnetzer N, Englert K, Schulz R, Bundschuh M. Does the current fungicide risk assessment provide sufficient protection for key drivers in aquatic ecosystem functioning? ENVIRONMENTAL SCIENCE & TECHNOLOGY 2015; 49:1173-1181. [PMID: 25517729 DOI: 10.1021/es5050453] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The level of protection provided by the present environmental risk assessment (ERA) of fungicides in the European Union for fungi is unknown. Therefore, we assessed the structural and functional implications of five fungicides with different modes of action (azoxystrobin, carbendazim, cyprodinil, quinoxyfen, and tebuconazole) individually and in mixture on communities of aquatic hyphomycetes. This is a polyphyletic group of fungi containing key drivers in the breakdown of leaf litter, governing both microbial leaf decomposition and the palatability of leaves for leaf-shredding macroinvertebrates. All fungicides impaired leaf palatability to the leaf-shredder Gammarus fossarum and caused structural changes in fungal communities. In addition, all compounds except for quinoxyfen altered microbial leaf decomposition. Our results suggest that the European Union’s first-tier ERA provides sufficient protection for the tested fungicides, with the exception of tebuconazole and the mixture, while higher-tier ERA does not provide an adequate level of protection for fungicides in general. Therefore, our results show the need to incorporate aquatic fungi as well as their functions into ERA testing schemes to safeguard the integrity of aquatic ecosystems.
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34
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Feckler A, Rosenfeldt RR, Seitz F, Schulz R, Bundschuh M. Photocatalytic properties of titanium dioxide nanoparticles affect habitat selection of and food quality for a key species in the leaf litter decomposition process. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2015; 196:276-283. [PMID: 25463723 DOI: 10.1016/j.envpol.2014.09.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 09/16/2014] [Accepted: 09/22/2014] [Indexed: 06/04/2023]
Abstract
Interactions with environmental parameters may alter the ecotoxicity of nanoparticles. The present study therefore assessed the (in)direct effects of nanoparticulate titanium dioxide (nano-TiO(2)) towards Gammarus fossarum, considering nano-TiO(2)'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-TiO(2) as proxy (n = 49). UV-irradiational one induced a significant preference for UV-protected habitats, which was more pronounced in simultaneous presence of nano-TiO(2). This behaviour may be mainly explained by the UV-induced formation of reactive oxygen species (ROS) by nano-TiO(2). 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-TiO(2) in combination with UV irradiation falls below the predicted environmental concentration this study underpins the importance of considering environmental parameters during the risk assessment of nanoparticles.
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Affiliation(s)
- Alexander Feckler
- Institute for Environmental Sciences, University of Koblenz-Landau, Fortstrasse 7, 76829 Landau, Germany.
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35
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Dimitrov MR, Kosol S, Smidt H, Buijse L, Van den Brink PJ, Van Wijngaarden RPA, Brock TCM, Maltby L. Assessing effects of the fungicide tebuconazole to heterotrophic microbes in aquatic microcosms. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 490:1002-1011. [PMID: 24914529 DOI: 10.1016/j.scitotenv.2014.05.073] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 05/12/2014] [Accepted: 05/16/2014] [Indexed: 06/03/2023]
Abstract
Aquatic ecological risk assessment of fungicides in Europe under Regulation 1107/2009/EC does not currently assess risk to non-target bacteria and fungi. Rather, regulatory acceptable concentrations based on ecotoxicological data obtained from studies with fish, invertebrates and primary producers (including algae) are assumed to be protective to all other aquatic organisms. Here we explore the validity of this assumption by investigating the effects of a fungicide (tebuconazole) applied at its "non-microbial" HC5 concentration (the concentration that is hazardous to 5% of the tested taxa) and derived from acute single species toxicity tests on fish, invertebrates and primary producers (including algae) on the community structure and functioning of heterotrophic microbes (bacteria and aquatic fungi) in a semi-field study, using novel molecular techniques. In our study, a treatment-related effect of tebuconazole (238 μg/L) on either fungal biomass associated with leaf material or leaf decomposition or the composition of the fungal community associated with sediment could not be demonstrated. Moreover, treatment-related effects on bacterial communities associated with sediment and leaf material were not detected. However, tebuconazole exposure did significantly reduce conidia production and altered fungal community composition associated with leaf material. An effect on a higher trophic level was observed when Gammarus pulex were fed tebuconazole-exposed leaves, which caused a significant decrease in their feeding rate. Therefore, tebuconazole may affect aquatic fungi and fungally mediated processes even when applied at its "non-microbial" HC5 concentration.
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Affiliation(s)
- Mauricio R Dimitrov
- Laboratory of Microbiology, Wageningen University, Dreijenplein 10, 6703 HB Wageningen, the Netherlands; Department of Aquatic Ecology and Water Quality Management, Wageningen University, P.O. Box 47, 6700 AA Wageningen, the Netherlands.
| | - Sujitra Kosol
- Thailand Institute of Scientific and Technological Research 35 Moo 3, Tambon Klong five, Klong Laung, PathumThani 12120, Thailand; Department of Animal and Plant Sciences, The University of Sheffield, Sheffield S10 2TN, UK
| | - Hauke Smidt
- Laboratory of Microbiology, Wageningen University, Dreijenplein 10, 6703 HB Wageningen, the Netherlands
| | - Laura Buijse
- Alterra, Wageningen University and Research Centre, P.O. Box 47, 6700 AA Wageningen, the Netherlands
| | - Paul J Van den Brink
- Department of Aquatic Ecology and Water Quality Management, Wageningen University, P.O. Box 47, 6700 AA Wageningen, the Netherlands; Alterra, Wageningen University and Research Centre, P.O. Box 47, 6700 AA Wageningen, the Netherlands
| | - René P A Van Wijngaarden
- Alterra, Wageningen University and Research Centre, P.O. Box 47, 6700 AA Wageningen, the Netherlands
| | - Theo C M Brock
- Alterra, Wageningen University and Research Centre, P.O. Box 47, 6700 AA Wageningen, the Netherlands
| | - Lorraine Maltby
- Department of Animal and Plant Sciences, The University of Sheffield, Sheffield S10 2TN, UK
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36
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Zubrod JP, Baudy P, Schulz R, Bundschuh M. Effects of current-use fungicides and their mixtures on the feeding and survival of the key shredder Gammarus fossarum. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2014; 150:133-143. [PMID: 24674876 DOI: 10.1016/j.aquatox.2014.03.002] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 02/14/2014] [Accepted: 03/02/2014] [Indexed: 06/03/2023]
Abstract
Fungicides are frequently applied in agriculture and are subsequently detected in surface waters in total concentrations of up to several tens of micrograms per liter. These concentrations imply potential effects on aquatic communities and fundamental ecosystem functions such as leaf litter breakdown. In this context, the present study investigates sublethal and lethal effects of organic (azoxystrobin, carbendazim, cyprodinil, quinoxyfen, and tebuconazole) and inorganic (three copper (Cu)-based substances and sulfur) current-use fungicides and their mixtures on the key leaf-shredding invertebrate Gammarus fossarum. The feeding activity of fungicide-exposed gammarids was quantified as sublethal endpoint using a static (organic fungicides; 7 d test duration) or a semi-static (inorganic fungicides; 6 d test duration with a water exchange after 3 d) approach (n=30). EC50-values of organic fungicides were generally observed at concentrations resulting in less than 20% mortality, with the exception of carbendazim. With regard to feeding, quinoxyfen was the most toxic organic fungicide, followed by cyprodinil, carbendazim, azoxystrobin, and tebuconazole. Although all tested organic fungicides have dissimilar (intended) modes of action, a mixture experiment revealed a synergistic effect on gammarids' feeding at high concentrations when using "independent action" as the reference model (∼35% deviation between predicted and observed effect). This may be explained by the presence of a synergizing azole fungicide (i.e. tebuconazole) in this mixture. Furthermore, lethal concentrations of all Cu-based fungicides assessed in this study were comparable amongst one another. However, they differed markedly in their effective concentrations when using feeding activity as the endpoint, with Cu-sulfate being most toxic, followed by Cu-hydroxide and Cu-octanoate. In contrast, sulfur neither affected survival nor the feeding activity of gammarids (up to ∼5 mg/L) but reduced Cu-sulfate's toxicity when applied in a binary mixture. Sulfur-related metabolic processes which reduce the physiological availability of Cu may explain this antagonistic effect. For both fungicide mixtures, the present study thus uncovered deviations from the appropriate reference model, while ecotoxicological effects were observed at field relevant (total) fungicide concentrations. Additionally, for more than half of the tested single substances, a potential risk for Gammarus and thus for the ecological function mediated by these organisms was evident at concentrations measured in agriculturally influenced surface waters. These results suggest that risks to the fundamental ecosystem function of leaf litter breakdown posed by fungicides may not be adequately considered during the regulation of these compounds, which makes further experimental efforts necessary.
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Affiliation(s)
- J P Zubrod
- Institute for Environmental Sciences, University of Koblenz-Landau, Fortstraße 7, D-76829 Landau, Germany.
| | - P Baudy
- Institute for Environmental Sciences, University of Koblenz-Landau, Fortstraße 7, D-76829 Landau, Germany
| | - R Schulz
- Institute for Environmental Sciences, University of Koblenz-Landau, Fortstraße 7, D-76829 Landau, Germany
| | - M Bundschuh
- Institute for Environmental Sciences, University of Koblenz-Landau, Fortstraße 7, D-76829 Landau, Germany; Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences, Lennart Hjelms väg 9, 75007 Uppsala, Sweden
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37
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Feckler A, Zubrod JP, Thielsch A, Schwenk K, Schulz R, Bundschuh M. Cryptic species diversity: an overlooked factor in environmental management? J Appl Ecol 2014. [DOI: 10.1111/1365-2664.12246] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Alexander Feckler
- Institute for Environmental Sciences; University of Koblenz-Landau; Fortstrasse 7 D-76829 Landau Germany
| | - Jochen P. Zubrod
- Institute for Environmental Sciences; University of Koblenz-Landau; Fortstrasse 7 D-76829 Landau Germany
| | - Anne Thielsch
- Institute for Environmental Sciences; University of Koblenz-Landau; Fortstrasse 7 D-76829 Landau Germany
| | - Klaus Schwenk
- Institute for Environmental Sciences; University of Koblenz-Landau; Fortstrasse 7 D-76829 Landau Germany
| | - Ralf Schulz
- Institute for Environmental Sciences; University of Koblenz-Landau; Fortstrasse 7 D-76829 Landau Germany
| | - Mirco Bundschuh
- Institute for Environmental Sciences; University of Koblenz-Landau; Fortstrasse 7 D-76829 Landau Germany
- Department of Aquatic Sciences and Assessment; Swedish University of Agricultural Sciences; Lennart Hjelms väg 9 SWE-75007 Uppsala Sweden
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38
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Flores L, Banjac Z, Farré M, Larrañaga A, Mas-Martí E, Muñoz I, Barceló D, Elosegi A. Effects of a fungicide (imazalil) and an insecticide (diazinon) on stream fungi and invertebrates associated with litter breakdown. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 476-477:532-41. [PMID: 24496026 DOI: 10.1016/j.scitotenv.2014.01.059] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 12/31/2013] [Accepted: 01/16/2014] [Indexed: 05/15/2023]
Abstract
The intensification of agriculture has promoted the use of pesticides such as fungicides and insecticides. Many pesticides readily leach into natural water bodies and affect both organisms and ecosystem processes such as leaf breakdown, a crucial process in headwater streams. As leaf breakdown in streams involves sequential steps by different groups of organisms (first microbial conditioning, then invertebrate shredding), pesticides targeting different organisms are likely to affect one or the other step, and a mixture of contaminants might have interactive effects. Our objective was to evaluate the effect of a fungicide (imazalil) and an insecticide (diazinon) on stream fungal and invertebrate activities, and their effects on leaf consumption. After an initial assay to define 'effective concentration' of both pesticides in a laboratory experiment, we manipulated pesticide presence/absence during the conditioning and shredding phases. Both pesticides affected fungal community and reduced the performance of the shredding amphipod Echinogammarus berilloni, and leaf consumption. The impact of pesticides on fungal sporulation depended on the length of the exposure period. In addition, pesticides seemed to cause an energetic imbalance in the amphipod, affecting body condition and mortality. The combined effect of both pesticides was similar to those of the fungicide. Overall, our results show that the effects of pesticide mixtures on leaf breakdown are hard to predict from those observed in either fungi or macroinvertebrate performance.
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Affiliation(s)
- L Flores
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), PO Box 644, 48080 Bilbao, Spain..
| | - Z Banjac
- Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/Jordi Girona 18-26, 08034 Barcelona, Spain
| | - M Farré
- Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/Jordi Girona 18-26, 08034 Barcelona, Spain
| | - A Larrañaga
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), PO Box 644, 48080 Bilbao, Spain
| | - E Mas-Martí
- Department of Ecology, University of Barcelona (UB), Av. Diagonal, 643, 08028 Barcelona, Spain
| | - I Muñoz
- Department of Ecology, University of Barcelona (UB), Av. Diagonal, 643, 08028 Barcelona, Spain
| | - D Barceló
- Institute of Environmental Assessment and Water Research (IDAEA-CSIC), C/Jordi Girona 18-26, 08034 Barcelona, Spain
| | - A Elosegi
- Department of Plant Biology and Ecology, University of the Basque Country (UPV/EHU), PO Box 644, 48080 Bilbao, Spain
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39
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Artigas J, Pascault N, Bouchez A, Chastain J, Debroas D, Humbert JF, Leloup J, Tadonleke RD, ter Halle A, Pesce S. Comparative sensitivity to the fungicide tebuconazole of biofilm and plankton microbial communities in freshwater ecosystems. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 468-469:326-336. [PMID: 24048021 DOI: 10.1016/j.scitotenv.2013.08.074] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 08/23/2013] [Accepted: 08/23/2013] [Indexed: 06/02/2023]
Abstract
Stream and lake ecosystems in agricultural watersheds are exposed to fungicide inputs that can threaten the structure and functioning of aquatic microbial communities. This research analyzes the impact of the triazole fungicide tebuconazole (TBZ) on natural biofilm and plankton microbial communities from sites presenting different degrees of agricultural contamination. Biofilm and plankton communities from less-polluted (LP) and polluted (P) sites were exposed to nominal concentrations of 0 (control), 2 and 20 μg TBZ L(-1) in 3-week microcosm experiments. Descriptors of microbial community structure (bacterial density and chlorophyll-a concentration) and function (bacterial respiration and production and photosynthesis) were analyzed to chart the effects of TBZ and the kinetics of TBZ attenuation in water during the experiments. The results showed TBZ-induced effects on biofilm function (inhibition of substrate-induced respiration and photosynthetic activity), especially in LP-site communities, whereas plankton communities experienced a transitory stimulation of bacterial densities in communities from both LP and P sites. TBZ attenuation was stronger in biofilm (60-75%) than plankton (15-18%) experiments, probably due to greater adsorption on biofilms. The differences between biofilm and plankton responses to TBZ were likely explained by differences in community structure (presence of extracellular polymeric substances (EPS) matrix) and microbial composition. Biofilm communities also exhibited different sensitivity levels according to their in-field pre-exposure to fungicide, with P-site communities demonstrating adaptation capacities to TBZ. This study indicates that TBZ toxicity to non-targeted aquatic microbial communities essentially composed by microalgae and bacteria was moderate, and that its effects varied between stream and lake microbial communities.
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Affiliation(s)
- J Artigas
- Irstea, UR MALY, 3 bis quai Chauveau, CP 220, 69336 Lyon, France; Clermont Université, Université Blaise Pascal, Laboratoire "Microorganismes: Génome et Environnement", BP 10448, 63000 Clermont-Ferrand, France; CNRS, UMR 6023, LMGE, 63177 Aubière, France.
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40
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Chambers JE, Greim H, Kendall RJ, Segner H, Sharpe RM, Van Der Kraak G. Human and ecological risk assessment of a crop protection chemical: a case study with the azole fungicide epoxiconazole. Crit Rev Toxicol 2013; 44:176-210. [DOI: 10.3109/10408444.2013.855163] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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41
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Rasmussen JJ, Wiberg-Larsen P, Kristensen EA, Cedergreen N, Friberg N. Pyrethroid effects on freshwater invertebrates: a meta-analysis of pulse exposures. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2013; 182:479-485. [PMID: 24035458 DOI: 10.1016/j.envpol.2013.08.012] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 08/07/2013] [Accepted: 08/20/2013] [Indexed: 06/02/2023]
Abstract
Pyrethroids are widely used insecticides that may seriously harm aquatic organisms. Being strongly hydrophobic, pyrethroids in solution occur only in short pulses but may be retained in sediments for longer periods. Consequently, most studies consider the chronic exposure of sediment dwelling organisms. We collected data from 16 studies to determine effect thresholds for stream macroinvertebrates exposed to short pyrethroid pulses evaluating lethal and sublethal ecologically relevant endpoints. Dose-response models showed EC50 for lethality, functional and behavioural endpoints down to 1/100, 1/100 and 1/1000 of the 48 h LC50 for Daphnia magna, respectively. The results indicate that the overall sensitivity of stream macroinvertebrates to pyrethroids may be higher than previously believed. This review shows the relevance of incorporating data on sublethal endpoints and appropriate post-exposure observation periods in future studies. The current risk assessment procedures and the higher tier approach are discussed in the light of our results.
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Affiliation(s)
- Jes Jessen Rasmussen
- Aarhus University, Department of Bioscience, Vejlsøvej 25, 8600 Silkeborg, Denmark; University of Copenhagen, Department of Plant and Environmental Sciences, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark.
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42
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Rasmussen JJ, Nørum U, Jerris MR, Wiberg-Larsen P, Kristensen EA, Friberg N. Pesticide impacts on predator-prey interactions across two levels of organisation. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2013; 140-141:340-345. [PMID: 23891783 DOI: 10.1016/j.aquatox.2013.06.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 06/20/2013] [Accepted: 06/21/2013] [Indexed: 06/02/2023]
Abstract
In this study, we aimed to evaluate the effects of a short pulse exposure of the pyrethroid lambda-cyhalothrin (LC) on the predator and anti-predator behaviour of the same species; Gammarus pulex. Predator behaviour, at the level of the individual, was studied in indoor microcosms using video tracking equipment during simultaneous exposure of the predator (G. pulex) and its prey (Leuctra nigra) during 90 min exposure of 1, 6.6 or 62.1 ngL(-1) LC. During an initial 30 min of exposure, the predator and prey organisms were maintained physically separated, and the actual interaction was studied through the subsequent 60 min of exposure. The anti-predator behaviour of G. pulex (drift suppression in response to the presence of brown trout) was studied in outdoor stream channels during a 90 min pulse exposure to LC (7.4 or 79.5 ngL(-1)) with, or without, brown trout. Based on survival curves for L. nigra we found that the mortality rate for L. nigra significantly decreased during exposure to 6.6 and 62.1 ngL(-1) LC (P<0.05 and P<0.001, respectively). We found no significant effects suggesting that G. pulex was repelled by contaminated prey items (P>0.05). We found that the exposure of G. pulex to 7.4 and 79.5 ngL(-1) LC significantly increased drift (from ∼0% to ∼100% in both treatments; P<0.001) independent of the presence of brown trout (P<0.05). In other words, the natural anti-predator behaviour of G. pulex was overruled by the stress response to LC exposure increasing G. pulex predation risk from drift feeding brown trouts. Our results show that the anti-predator and predator behaviour of G. pulex were significantly changed during exposure to very low and environmentally realistic LC concentrations and exposure duration. The potential implications for the field scenario are discussed.
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Affiliation(s)
- Jes Jessen Rasmussen
- Aarhus University, Institute of Bioscience, Vejlsøvej 25, 8600 Silkeborg, Denmark.
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Amorim CC, Bottrel SEC, Costa EP, Teixeira APC, Leão MMD. Removal of ethylenthiourea and 1,2,4-triazole pesticide metabolites from water by adsorption in commercial activated carbons. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2013; 48:183-190. [PMID: 23356339 DOI: 10.1080/03601234.2013.730287] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This study evaluated the adsorption capacity of ethylenthiourea (ETU) and 1H-1,2,4-triazole (1,2,4-T) for two commercial activated carbons: charcoal-powdered activated carbon (CPAC) and bovine bone-powdered activated carbon (BPAC). The tests were conducted at a bench scale, with ETU and 1,2,4-T diluted in water, for isotherm and adsorption kinetic studies. The removal of the compounds was accompanied by a total organic carbon (TOC) analysis and ultraviolet (UV) reduction analysis. The coals were characterized by their surface area using nitrogen adsorption/desorption, by a scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM/EDS) and by a zero charge point analysis (pHpcz). The results showed that adsorption kinetics followed a pseudo-second-order model for both coals, and the adsorption isotherms for CPAC and BPAC were adjusted to the Langmuir and Freundlich isotherms, respectively. The CPAC removed approximately 77% of the ETU and 76% of the 1,2,4-T. The BPAC was ineffective at removing the contaminants.
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Affiliation(s)
- Camila C Amorim
- Department of Sanitary and Environmental Engineering, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil.
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44
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Artigas J, Majerholc J, Foulquier A, Margoum C, Volat B, Neyra M, Pesce S. Effects of the fungicide tebuconazole on microbial capacities for litter breakdown in streams. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2012; 122-123:197-205. [PMID: 22824240 DOI: 10.1016/j.aquatox.2012.06.011] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 06/21/2012] [Accepted: 06/22/2012] [Indexed: 06/01/2023]
Abstract
Streams draining agricultural basins are subjected to the input of fungicides which can affect aquatic microbial communities. We analyzed the effect of the fungicide tebuconazole (TBZ) on Alnus glutinosa and Populus nigra litter breakdown by aquatic microorganisms. For six weeks, fungal and bacterial responses were analyzed in indoor stream channels subjected to TBZ-contaminated (33.1±12.4 μg L(-1)) and uncontaminated conditions. Litter breakdown rates decreased in presence of TBZ. The decrease was explained by reductions in microbial biomass development and shifts in community structure. At the same time, TBZ modified the kinetics of β-glucosidase, β-xylosidase and cellobiohydrolase enzymes resulting in lower affinities for cellulose and hemicellulose decomposition in leaves. These alterations were modulated by the litter quality; the greatest structural impairment was observed in Populus whereas Alnus were more affected in terms of leaf breakdown rate. Our results suggest that chronic exposure to TBZ can affect aquatic microbial communities and their capacity to break down leaf litter in streams.
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Affiliation(s)
- Joan Artigas
- Irstea, UR MALY, 3 bis quai Chauveau-CP 220, F-69336 Lyon, France.
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