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Wang H, Strock J, Ranaivoson A, Ishii S. Bioremediation of nitrate in agricultural drainage ditches: Impacts of low-grade weirs on microbiomes and nitrogen cycle gene abundance. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 955:177070. [PMID: 39454790 DOI: 10.1016/j.scitotenv.2024.177070] [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: 07/22/2024] [Revised: 09/19/2024] [Accepted: 10/17/2024] [Indexed: 10/28/2024]
Abstract
Artificial drainage is essential for the success of modern agriculture, but it can also accelerate the movement of nutrients, especially nitrate, from soil to surrounding and downstream water bodies. Removal of nitrate from agricultural drainage by using controlled drainage systems, such as ditches installed with low-grade weirs, has been shown to help reduce nutrient loading into watersheds. However, the effect of low-grade weirs varies greatly, likely due to the differences in climate, system designs (e.g., hydraulic characteristics), and the resulting variation in microbial structures and functions in the ditch. In this study, we analyzed the temporal and spatial dynamics of microbiomes in a paired ditch system with weir-installed and uninstalled (control) channels over two years by using the 16S rRNA gene amplicon sequencing and the high-throughput quantitative PCR targeting various N cycle-associated genes [the Nitrogen Cycle Evaluation (NiCE) chip]. The installation of the low-grade weir had a significant impact on the microbiome structure and the distribution of denitrifiers. Microbiome structures also differed significantly between the ditch inlets and the outlets. Denitrification functional genes were more abundant in the inlets than in the other locations and in the channel installed with a low-grade weir. Additionally, oxygenic denitrifiers that use nitric oxide dismutase (nod) to produce N2 and O2 gases from nitric oxide were detected in the ditch channels, suggesting the occurrence of nitrate removal process that bypasses the production of nitrous oxide (N2O). The ditch microbiomes sampled during high-flow seasons (i.e., spring and fall) exhibited greater similarity to each other than microbiomes sampled during low-flow seasons (i.e., summer). Taken together, this study indicates that the low-grade weirs have the potential to foster a more favorable environment for denitrifiers, resulting in an increase in the abundance of denitrification functional genes. These findings could offer valuable insights into system management and optimization strategies.
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Affiliation(s)
- Hao Wang
- Department of Soil, Water, and Climate, University of Minnesota, 1991 Upper Buford Circle, 439 Borlaug Hall, St. Paul, MN 55108, USA
| | - Jeffrey Strock
- Department of Soil, Water, and Climate, University of Minnesota, 1991 Upper Buford Circle, 439 Borlaug Hall, St. Paul, MN 55108, USA; Southwest Research and Outreach Center, University of Minnesota, 23669 130th St., Lamberton, MN 56152, USA
| | - Andry Ranaivoson
- Department of Soil, Water, and Climate, University of Minnesota, 1991 Upper Buford Circle, 439 Borlaug Hall, St. Paul, MN 55108, USA; Southwest Research and Outreach Center, University of Minnesota, 23669 130th St., Lamberton, MN 56152, USA
| | - Satoshi Ishii
- Department of Soil, Water, and Climate, University of Minnesota, 1991 Upper Buford Circle, 439 Borlaug Hall, St. Paul, MN 55108, USA; BioTechnology Institute, University of Minnesota, 140 Gortner Lab, 1479 Gortner Ave., St. Paul, MN 55108, USA.
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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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Bastidas Navarro M, Schenone L, Martyniuk N, Vega E, Modenutti B, Balseiro E. Predicting Dissolved Organic Matter Lability and Carbon Accumulation in Temperate Freshwater Ecosystems. Ecosystems 2021. [DOI: 10.1007/s10021-021-00682-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Bartonitz A, Anyanwu IN, Geist J, Imhof HK, Reichel J, Graßmann J, Drewes JE, Beggel S. Modulation of PAH toxicity on the freshwater organism G. roeseli by microparticles. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 260:113999. [PMID: 32018198 DOI: 10.1016/j.envpol.2020.113999] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 01/13/2020] [Accepted: 01/14/2020] [Indexed: 06/10/2023]
Abstract
Polycyclic aromatic hydrocarbons are widespread and environmentally persistent chemicals that readily bind to particles in air, soil and sediment. Plastic particles, which are also an ubiquitous global contamination problem, may thus modulate their environmental fate and ecotoxicity. First, the acute aqueous toxicity of phenanthrene in adult Gammarus roeseli was determined with a LC50 of 471 μg/L after 24 h and 441 μg/L after 48 h. Second, considering lethal and sublethal endpoints, effects of phenanthrene concentration on G. roeseli were assessed in relation to the presence of anthropogenic and natural particles. The exposure of gammarids in presence of either particle type with phenanthrene resulted after 24 and 48 h in reduced effect size. Particle exposure alone did not result in any effects. The observed reduction of phenanthrene toxicity by polyamide contradicts the discussion of microplastics acting as a vector or synergistically. Especially, no difference in modulation by plastic particles and naturally occurring sediment particles was measured. These findings can most likely be explained by the similar adsorption of phenanthrene to both particle types resulting in reduced bioavailability.
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Affiliation(s)
- Astrid Bartonitz
- Aquatic Systems Biology Unit, School of Life Sciences Weihenstephan, Technical University of Munich, Mühlenweg 22, 85354, Freising Weihenstephan, Germany.
| | - Ihuoma N Anyanwu
- Department of Biology/ Microbiology/ Biotechnology, Faculty of Science, Alex-Ekwueme Federal University Ndufu-Alike Ikwo, P.M.B 1010, Ebonyi State, Nigeria
| | - Juergen Geist
- Aquatic Systems Biology Unit, School of Life Sciences Weihenstephan, Technical University of Munich, Mühlenweg 22, 85354, Freising Weihenstephan, Germany
| | - Hannes K Imhof
- Aquatic Systems Biology Unit, School of Life Sciences Weihenstephan, Technical University of Munich, Mühlenweg 22, 85354, Freising Weihenstephan, Germany
| | - Julia Reichel
- Chair of Urban Water Systems Engineering, Department of Civil, Geo and Environmental Engineering, Technical University of Munich, Am Coulombwall 3, 85748, Garching, Germany
| | - Johanna Graßmann
- Chair of Urban Water Systems Engineering, Department of Civil, Geo and Environmental Engineering, Technical University of Munich, Am Coulombwall 3, 85748, Garching, Germany
| | - Joerg E Drewes
- Chair of Urban Water Systems Engineering, Department of Civil, Geo and Environmental Engineering, Technical University of Munich, Am Coulombwall 3, 85748, Garching, Germany
| | - Sebastian Beggel
- Aquatic Systems Biology Unit, School of Life Sciences Weihenstephan, Technical University of Munich, Mühlenweg 22, 85354, Freising Weihenstephan, Germany
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Musters CJM, Ieromina O, Barmentlo SH, Hunting ER, Schrama M, Cieraad E, Vijver MG, van Bodegom PM. Partitioning the impact of environmental drivers and species interactions in dynamic aquatic communities. Ecosphere 2019. [DOI: 10.1002/ecs2.2910] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- C. J. M. Musters
- Institute of Environmental Sciences Leiden University Leiden The Netherlands
| | - Oleksandra Ieromina
- Dutch Board for the Authorisation of Plant Protection Products and Biocides (Ctgb) Ede The Netherlands
| | - S. Henrik Barmentlo
- Institute of Environmental Sciences Leiden University Leiden The Netherlands
| | - Ellard R. Hunting
- School of Biological Sciences University of Bristol Bristol UK
- Biology Department Woods Hole Oceanographic Institution, Woods Hole Massachusetts USA
| | - Maarten Schrama
- Institute of Environmental Sciences Leiden University Leiden The Netherlands
- Naturalis Biodiversity Center Leiden The Netherlands
| | - Ellen Cieraad
- Institute of Environmental Sciences Leiden University Leiden The Netherlands
| | - Martina G. Vijver
- Institute of Environmental Sciences Leiden University Leiden The Netherlands
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Arora NK, Fatima T, Mishra I, Verma M, Mishra J, Mishra V. Environmental sustainability: challenges and viable solutions. ACTA ACUST UNITED AC 2018. [DOI: 10.1007/s42398-018-00038-w] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Filimonova V, Nys C, De Schamphelaere KAC, Gonçalves F, Marques JC, Gonçalves AMM, De Troch M. Ecotoxicological and biochemical mixture effects of an herbicide and a metal at the marine primary producer diatom Thalassiosira weissflogii and the primary consumer copepod Acartia tonsa. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:22180-22195. [PMID: 29804247 DOI: 10.1007/s11356-018-2302-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Accepted: 05/11/2018] [Indexed: 06/08/2023]
Abstract
Mixture effects of chemicals and their potential synergistic interactions are of great concern to the public and regulatory authorities worldwide. Intensive agricultural activities are leading to discharges of chemical mixtures to nearby estuarine and marine waters with possible adverse effects on the aquatic communities and for the trophic food web interlinking these communities. Further information about the impacts of these stressors on aquatic organisms is needed. This study addresses ecotoxicological and biochemical effects of single and mixtures of the metal copper and the herbicide Primextra® Gold TZ on the marine diatom Thalassiosira weissflogii and on the estuarine calanoid copepod Acartia tonsa by determining growth rate and survival, respectively, and changes on fatty acid(FA) profiles in both species. Mixture effects on diatom species revealed that copper and Primextra® acted most likely additively with respect to the concentration addition (CA) and independent action (IA) models with model deviation ratios (MDR), 0.752 and 1.063, respectively. For the copepod species, copper and Primextra® were most likely non-interactive with respect to the CA model (MDR = 1.521) but acted most likely synergistically with respect to the IA model (MDR = 2.026). A significant decline in the absolute FA concentration was observed for copepod species after mixture exposure including a considerable decrease of essential FAs that cannot be synthesized de novo by these grazers. We concluded that the mixture effects are more hazardous for primary consumer than for primary producer species in terms of both abundance and biomass quality, suggesting a potential for harmful effects for higher trophic levels and thus a decrease in energy flow through the ecosystem.
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Affiliation(s)
- Valentina Filimonova
- IMAR-CMA and MARE, Faculty of Science and Technology, University of Coimbra, 3004-517, Coimbra, Portugal.
- Department of Biology and CESAM, University of Aveiro, 3810-193, Aveiro, Portugal.
- Faculty of Science, Biology Department, Marine Biology, Ghent University, Krijgslaan 281-S8, 9000, Ghent, Belgium.
| | - Charlotte Nys
- Faculty of Bioscience Engineering, GhenToxLab, Ghent University, Jozef Plateaustraat 22, 9000, Ghent, Belgium
| | - Karel A C De Schamphelaere
- Faculty of Bioscience Engineering, GhenToxLab, Ghent University, Jozef Plateaustraat 22, 9000, Ghent, Belgium
| | - Fernando Gonçalves
- Department of Biology and CESAM, University of Aveiro, 3810-193, Aveiro, Portugal
| | - João C Marques
- IMAR-CMA and MARE, Faculty of Science and Technology, University of Coimbra, 3004-517, Coimbra, Portugal
| | - Ana M M Gonçalves
- IMAR-CMA and MARE, Faculty of Science and Technology, University of Coimbra, 3004-517, Coimbra, Portugal
- Department of Biology and CESAM, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Marleen De Troch
- Faculty of Science, Biology Department, Marine Biology, Ghent University, Krijgslaan 281-S8, 9000, Ghent, Belgium
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Rodrigues ACM, Machado AL, Bordalo MD, Saro L, Simão FCP, Rocha RJM, Golovko O, Žlábek V, Barata C, Soares AMVM, Pestana JLT. Invasive Species Mediate Insecticide Effects on Community and Ecosystem Functioning. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:4889-4900. [PMID: 29565569 DOI: 10.1021/acs.est.8b00193] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Anthropogenic activities increase pesticide contamination and biological invasions in freshwater ecosystems. Understanding their combined effects on community structure and on ecosystem functioning presents challenges for an improved ecological risk assessment. This study focuses on an artificial stream mesocosms experiment testing for direct and indirect effects of insecticide (chlorantraniliprole - CAP) exposure on the structure of a benthic macroinvertebrate freshwater community and on ecosystem functioning (leaf decomposition, primary production). To understand how predator identity and resource quality alter the community responses to chemical stress, the mediating effects of an invasive predator species (crayfish Procambarus clarkii) and detritus quality (tested by using leaves of the invasive Eucalyptus globulus) on insecticide toxicity were also investigated. Low concentrations of CAP reduced the abundance of shredders and grazers, decreasing leaf decomposition and increasing primary production. Replacement of autochthonous predators and leaf litter by invasive species decreased macroinvertebrate survival, reduced leaf decomposition, and enhanced primary production. Structural equation modeling (SEM) highlighted that CAP toxicity to macroinvertebrates was mediated by the presence of crayfish or eucalypt leaf litter which are now common in many Mediterranean freshwaters. In summary, our results demonstrate that the presence of these two invasive species alters the effects of insecticide exposure on benthic freshwater communities. The approach used here also allowed for a mechanistic evaluation of indirect effects of these stressors and of their interaction on ecosystem functional endpoint, emphasizing the value of incorporating biotic stressors in ecotoxicological experiments.
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Affiliation(s)
- Andreia C M Rodrigues
- Departamento de Biologia & CESAM , Universidade de Aveiro , Campus Universitário de Santiago , 3810-193 Aveiro , Portugal
- Department of Environmental Chemistry , IDAEA-CSIC , Jordi Girona, 18-26 , 08034 Barcelona , Spain
| | - Ana L Machado
- Departamento de Biologia & CESAM , Universidade de Aveiro , Campus Universitário de Santiago , 3810-193 Aveiro , Portugal
| | - Maria D Bordalo
- Departamento de Biologia & CESAM , Universidade de Aveiro , Campus Universitário de Santiago , 3810-193 Aveiro , Portugal
| | - Liliana Saro
- Departamento de Biologia & CESAM , Universidade de Aveiro , Campus Universitário de Santiago , 3810-193 Aveiro , Portugal
| | - Fátima C P Simão
- Departamento de Biologia & CESAM , Universidade de Aveiro , Campus Universitário de Santiago , 3810-193 Aveiro , Portugal
| | - Rui J M Rocha
- 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 , 389 25 Vodnany , Czech Republic
| | - Vladimír Žlábek
- Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses , University of South Bohemia in Ceske Budejovice , 389 25 Vodnany , Czech Republic
| | - Carlos Barata
- Department of Environmental Chemistry , IDAEA-CSIC , Jordi Girona, 18-26 , 08034 Barcelona , Spain
| | - Amadeu M V M Soares
- Departamento de Biologia & CESAM , Universidade de Aveiro , Campus Universitário de Santiago , 3810-193 Aveiro , Portugal
| | - João L T Pestana
- Departamento de Biologia & CESAM , Universidade de Aveiro , Campus Universitário de Santiago , 3810-193 Aveiro , Portugal
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Hunting ER, Barmentlo SH, Schrama M, van Bodegom PM, Zhai Y, Vijver MG. Agricultural constraints on microbial resource use and niche breadth in drainage ditches. PeerJ 2017; 5:e4175. [PMID: 29302393 PMCID: PMC5742521 DOI: 10.7717/peerj.4175] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 11/29/2017] [Indexed: 11/20/2022] Open
Abstract
Background Microorganisms govern important ecosystems processes, in particular the degradation of organic matter (OM). However, microorganisms are rarely considered in efforts to monitor ecosystem health and functioning. Evidence suggests that environmental perturbations can adversely affect microbial communities and their ability to use available substrates. However, whether impacted microbial efficiencies in extracting and utilizing the available resources (resource niche breadth) translate to changes in OM degradation in natural systems remains poorly understood. Methods Here we evaluated effects of differences in OM related to agricultural land use (OM derived from ditches adjacent to grasslands, bulb fields and a pristine dune area) on microbial functioning. We specifically assessed (1) resource niche breadths of microbial communities during initial community assembly in laboratory microcosms and already established natural communities, and (2) how changes in community resource niche breadth translates to the degradation of natural OM. Results A disparity existed between microbial resource niche breadth in laboratory incubations and natural microbial communities. Resource utilization and niche breadth of natural microbial communities was observed to be constrained in drainage ditches adjacent to agricultural fields. This outcome coincides with retarded degradation of natural OM collected from ditches adjacent to hyacinth bulb fields. Microbial communities in bulb field ditches further showed functional redundancy when offered grassland OM of seemingly higher substrate quality. Discussion Results presented in this study suggest that agricultural practices can impose constraints on microbial functional diversity by reducing OM resource quality, which can subsequently translate to confined microbial resource niche differentiation and reduced organic matter degradation rates. This hints that assessments of actual microbial resource utilization and niche differentiation could potentially be used to assess the ecological health and functioning of natural communities.
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Affiliation(s)
- Ellard R Hunting
- Institute of Environmental Sciences, Leiden University, Leiden, Netherlands
| | - S Henrik Barmentlo
- Institute of Environmental Sciences, Leiden University, Leiden, Netherlands
| | - Maarten Schrama
- Institute of Environmental Sciences, Leiden University, Leiden, Netherlands.,NIOO-KNAW, Wageningen, The Netherlands
| | | | - Yujia Zhai
- Institute of Environmental Sciences, Leiden University, Leiden, Netherlands
| | - Martina G Vijver
- Institute of Environmental Sciences, Leiden University, Leiden, Netherlands
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van der Lee GH, Kraak MHS, Verdonschot RCM, Vonk JA, Verdonschot PFM. Oxygen drives benthic-pelagic decomposition pathways in shallow wetlands. Sci Rep 2017; 7:15051. [PMID: 29118443 PMCID: PMC5678150 DOI: 10.1038/s41598-017-15432-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 10/27/2017] [Indexed: 11/27/2022] Open
Abstract
Oxygen availability is perceived as an important environmental factor limiting POM decomposition. In shallow wetlands, however, the impact of commonly observed anoxic conditions in the benthic layer on the relative contribution of microbes and invertebrates to POM decomposition remains largely unknown. Therefore, the aim of this study was to determine if dissolved oxygen drives benthic-pelagic decomposition pathways in shallow wetlands. Dissolved oxygen concentration, invertebrate community composition, microbial decomposition and invertebrate consumption were measured in the benthic and pelagic layer of 15 permanent drainage ditches. We showed that an increased duration of anoxic conditions in the benthic layer of the ditches was related to increased microbial decomposition in this layer, while invertebrate consumption decreased in the benthic layer and increased in the pelagic layer. The increased invertebrate consumption in the pelagic layer was related to the presence of amphipods. We concluded that anoxic conditions in the benthic layer of shallow wetlands relate to an increase in microbial decomposition and a decrease in invertebrate consumption, as detritivorous invertebrates move to the pelagic layer to consume particulate organic matter. This illustrates that environmental conditions, such as dissolved oxygen, may drive the relative importance of aquatic organisms to ecosystem functioning.
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Affiliation(s)
- Gea H van der Lee
- Institute for Biodiversity and Ecosystem Dynamics (IBED-FAME), University of Amsterdam, P.O. Box 94240, 1090 GE, Amsterdam, The Netherlands.
| | - Michiel H S Kraak
- Institute for Biodiversity and Ecosystem Dynamics (IBED-FAME), University of Amsterdam, P.O. Box 94240, 1090 GE, Amsterdam, The Netherlands
| | - Ralf C M Verdonschot
- Wageningen Environmental Research, Wageningen UR, P.O. Box 47, 6700 AA, Wageningen, The Netherlands
| | - J Arie Vonk
- Institute for Biodiversity and Ecosystem Dynamics (IBED-FAME), University of Amsterdam, P.O. Box 94240, 1090 GE, Amsterdam, The Netherlands
| | - Piet F M Verdonschot
- Institute for Biodiversity and Ecosystem Dynamics (IBED-FAME), University of Amsterdam, P.O. Box 94240, 1090 GE, Amsterdam, The Netherlands.,Wageningen Environmental Research, Wageningen UR, P.O. Box 47, 6700 AA, Wageningen, The Netherlands
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11
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Vonk JA, van Kuijk BF, van Beusekom M, Hunting ER, Kraak MHS. The significance of linoleic acid in food sources for detritivorous benthic invertebrates. Sci Rep 2016; 6:35785. [PMID: 27767068 PMCID: PMC5073349 DOI: 10.1038/srep35785] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2016] [Accepted: 10/05/2016] [Indexed: 11/09/2022] Open
Abstract
Chemical composition of organic matter (OM) is a key driver for detritus consumption by macroinvertebrates and polyunsaturated fatty acid (PUFA) content is considered a candidate indicator of food palatability. Since traditionally used complex natural OM covaries in many quality attributes, it remains uncertain whether benthic invertebrates developed an actual preference for PUFA-rich food. Therefore we aimed to test the influence of the PUFA linoleic acid on OM consumption by aquatic macroinvertebrates using standardized surrogate substrates (decomposition and consumption tablet, DECOTAB) with added linoleic acid (PUFA) in comparison to consumption of DECOTAB containing only cellulose (Standard) or ground macrophytes (Plant). In microcosms, we observed a higher consumption rate of PUFA DECOTAB in comparison to Standard DECOTAB in two functionally distinct invertebrate species (Lumbriculus variegatus and Asellus aquaticus). This effect appeared to be overruled in the field due to unknown sources of natural variation. Although we observed higher consumption rates in species-rich ditches compared to species-poor ditches, consumption rates were comparable for all three types of DECOTAB deployed. Upon reduced food quality and palatability, results presented here hint that PUFA like linoleic acid may be a key OM attribute driving the performance of benthic macroinvertebrates and inherent functioning of aquatic ecosystems.
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Affiliation(s)
- J Arie Vonk
- Department of Aquatic Environmental Ecology, Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, Sciencepark 904, 1098 XH Amsterdam, The Netherlands
| | - Bernd F van Kuijk
- Department of Aquatic Environmental Ecology, Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, Sciencepark 904, 1098 XH Amsterdam, The Netherlands
| | - Mick van Beusekom
- Department of Aquatic Environmental Ecology, Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, Sciencepark 904, 1098 XH Amsterdam, The Netherlands
| | - Ellard R Hunting
- Institute of Environmental Sciences (CML), Leiden University, PO Box 9518, 2300 RA Leiden, The Netherlands
| | - Michiel H S Kraak
- Department of Aquatic Environmental Ecology, Institute for Biodiversity and Ecosystem Dynamics (IBED), University of Amsterdam, Sciencepark 904, 1098 XH Amsterdam, The Netherlands
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