Effect of Diuron on aquatic bacteria in laboratory-scale wastewater treatment ponds with special reference to Aeromonas species studied by colony hybridization

Sumpono,; Perotti, P; Belan, André; Forestier, Christiane; Lavédrine, Bernadette; Bohatier, Jacques

doi:10.1016/s0045-6535(02)00621-5

Cited by 28 publications

(17 citation statements)

References 42 publications

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“…This effect has been seen in multicellular organisms (39-41, 43, 45) and microorganisms (15)(16)(17). Alternatively, agrochemicals may cause density-mediated, rather than trait-mediated, indirect effects via direct toxicity to a target species' food resources, parasites, competitors, or predators (18,21,22,36,41,(44)(45)(46)51). FIBs, pathogens, and other organisms ranging from bacterivorous protozoa to algae to aquatic animals are exposed to agrochemicals in environmental waters that receive agricultural runoff, but we know very little about the effect of the chemicals on the fate of microorganisms in such systems.…”

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confidence: 99%

Test of Direct and Indirect Effects of Agrochemicals on the Survival of Fecal Indicator Bacteria

Staley

Rohr

Harwood

2011

Appl Environ Microbiol

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Water bodies often receive agrochemicals and animal waste carrying fecal indicator bacteria (FIB) and zoonotic pathogens, but we know little about the effects of agrochemicals on these microbes. We assessed the direct effects of the pesticides atrazine, malathion, and chlorothalonil and inorganic fertilizer on Escherichia coli and enterococcal survival in simplified microcosms held in the dark. E. coli strain composition in sediments and water column were positively correlated, but none of the agrochemicals had significant direct effects on E. coli strain composition or on densities of culturable FIBs. In a companion study, microcosms with nondisinfected pond water and sediments were exposed to or shielded from sunlight to examine the potential indirect effects of atrazine and inorganic fertilizer on E. coli. The herbicide atrazine had no effect on E. coli in dark-exposed microcosms containing natural microbial and algal communities. However, in light-exposed microcosms, atrazine significantly lowered E. coli densities in the water column and significantly increased densities in the sediment compared to controls. This effect appears to be mediated by the effects of atrazine on algae, given that atrazine significantly reduced phytoplankton, which was a positive and negative predictor of E. coli densities in the water column and sediment, respectively. These data suggest that atrazine does not directly affect the survival of FIB, rather that it indirectly alters the distribution and abundance of E. coli by altering phytoplankton and periphyton communities. These results improve our understanding of the influence of agricultural practices on FIB densities in water bodies impacted by agricultural runoff.

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confidence: 99%

Test of Direct and Indirect Effects of Agrochemicals on the Survival of Fecal Indicator Bacteria

Staley

Rohr

Harwood

2011

Appl Environ Microbiol

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“…Community restructuring may have long-term effects on an ecosystem; however, the studies available only provide preliminary data on this subject. The authors of two other studies also reported adverse effects on microbes from diuron exposure (Pesce et al 2006;Sumpono et al 2003), but the concentrations tested were well-above the derived criteria and do not provide information regarding protection at levels near the criterion.…”

Section: Ecosystem-level Studiesmentioning

confidence: 95%

Aquatic Life Water Quality Criteria for Selected Pesticides

Tjeerdema¹

2012

Reviews of Environmental Contamination and Toxicology

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“…Understanding these bioremediation processes requires one to closely integrate physical and biotic functioning of river systems at a variety of scales (Janauer, 2000;Sumpono et al, 2003), and the present paper is an attempt to simulate the hyporeic condition in laboratory microcosms.…”

Section: Introductionmentioning

confidence: 99%

Role of the hyporheic heterotrophic biofilm on transformation and toxicity of pesticides

Sánchez‐Pérez

Montuelle

Mouchet

et al. 2013

Ann. Limnol. - Int. J. Lim.

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-The role of heterotrophic biofilm of water-sediment interface in detoxification processes was tested in abiotic and biotic conditions under laboratory conditions. Three toxicants, a herbicide (Diuron), a fungicide (Dimethomorph) and an insecticide (Chlorpyrifos-ethyl) have been tested in water percolating into columns reproducing hyporheic sediment. The detoxification processes were tested by comparing the water quality after 18 days of percolation with and without heterotrophic biofilm. Tested concentrations were 30 mg.L x1 of Diuron diluted in 0.1% dimethyl sulfoxide (DMSO), 2 mg.L x1 of Dimethomorph and 0.1 mg.L x1 of Chlorpyrifos-ethyl. To characterise the detoxification efficiency of the system, we performed genotoxicity bioassays in amphibian larvae and rotifers and measured the respiration and denitrification of sediments. Although the presence of biofilm increased the production of N-(3,4 dichlorophenyl)-N-(methyl)-urea, a metabolite of diuron, the toxicity did not decrease irrespective of the bioassay. In the presence of biofilm, Dimethomorph concentrations decreased compared with abiotic conditions, from 2 mg.L x1 to 0.4 mg.L x1 after 18 days of percolation. For both Dimethomorph and Chlorpyrifos-ethyl additions, assessment of detoxification level by the biofilm depended on the test used: detoxification effect was found with amphibian larvae bioassay and no detoxification was observed with the rotifer test. Heterotrophic biofilm exerts a major influence in the biochemical transformation of contaminants such as pesticides, suggesting that the interface between running water and sediment plays a role in self-purification of stream reaches.

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Effect of Diuron on aquatic bacteria in laboratory-scale wastewater treatment ponds with special reference to Aeromonas species studied by colony hybridization

Cited by 28 publications

References 42 publications

Test of Direct and Indirect Effects of Agrochemicals on the Survival of Fecal Indicator Bacteria

Test of Direct and Indirect Effects of Agrochemicals on the Survival of Fecal Indicator Bacteria

Aquatic Life Water Quality Criteria for Selected Pesticides

Role of the hyporheic heterotrophic biofilm on transformation and toxicity of pesticides

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