The Effect of Phorate on Wetland Macroinvertebrates

Dieter, Charles D.; Duffy, Walter G.; Flake, Lester D.

doi:10.1897/1551-5028(1996)015<0308:teopow>2.3.co;2

Cited by 10 publications

(13 citation statements)

References 16 publications

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“…The implementation of retention ponds in agricultural watersheds was mentioned by Scott et al [4] as one strategy to reduce the amount and toxicity of runoff‐related insecticide pollution discharging into estuaries. The usefulness of aquatic plants for removal of insecticides from water has been shown [5] and the effects of the organophosphate phorate have been assessed by using littoral mesocosms in South Dakota (USA) wetlands [6]. However, few other studies in the open literature deal with the fate or effects of agricultural insecticide input in constructed wetlands.…”

Section: Introductionmentioning

confidence: 99%

Methyl parathion toxicity in vegetated and nonvegetated wetland mesocosms

Schulz

Moore

Bennett

et al. 2003

Enviro Toxic and Chemistry

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Methyl parathion (MeP) was introduced into constructed wetlands for the purpose of assessing the influence of emergent vegetation on transport and toxicity of the pesticide. Two vegetated (90% cover, mainly Juncus effusus) and two nonvegetated wetland cells (each with a water body of 50 x 5.5 x 0.2 m) were each dosed with 6.5 m3 of water containing active ingredient of MeP at 6.6 mg/L associated with suspended soil at 400 mg/L to simulate a storm runoff event. Acute toxicity was assessed by sampling benthic macroinvertebrates at 5, 10, 20, and 40 m from the inlet before and 96 h after contamination and by in situ exposure of Chironomus tentans (Diptera) up to 24 h after contamination. Methyl parathion was detected throughout the nonvegetated wetland cells (70 microg/L at 20 m, 8 microg/L at 40 m), whereas the pesticide was not transported through the vegetated wetland cells (20 microg/L at 20 m, < 0.1 microg/L at 40 m). A three-way analysis of variance using contamination (repeated measure variable), location, and vegetation indicated significant negative effects of contamination on various insect taxa, such as mayfly nymphs and caddisfly larvae. Seven out of the total of 15 species revealed a significant contamination x vegetation effect, with individuals in the vegetated wetlands being less affected. Four species showed a significant contamination x location effect, confirming a higher toxicity in the inlet area of the wetlands. A significant three-way interaction of contamination x vegetation x location was detected in Chironomus sp., which was most strongly affected at the inlet area of the nonvegetated wetland cells. The in situ bioassay employing C. tentans confirmed the positive effect of wetland vegetation on MeP toxicity. These results demonstrate the importance of vegetation for pesticide mitigation in constructed wetlands.

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Section: Introductionmentioning

confidence: 99%

Methyl parathion toxicity in vegetated and nonvegetated wetland mesocosms

Schulz

Moore

Bennett

et al. 2003

Enviro Toxic and Chemistry

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“…The corresponding wetland zooplankton community included cladocerans, copepods, rotifers, nauplii, and ostracods (Beaver et al 1999). Modeled benthic invertebrates were separate populations of mayfly larvae, damselfly larvae, leeches, mosquito larvae, water beetles, and crayfish representative of Midwestern wetlands (Iowa Association of Naturalists 2001; Dieter et al 1996).…”

Section: Food Websmentioning

confidence: 99%

Modeling the effects of thiamethoxam on Midwestern farm ponds and emergent wetlands

Bartell

Nair

Grant

et al. 2017

Enviro Toxic and Chemistry

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Potential toxic effects of thiamethoxam on nontarget organisms and the community structure of a generic Midwestern farm pond and emergent wetland were assessed using 2 versions of the comprehensive aquatic system model: CASM , a generic farm pond model, and CASM , a generic wetland model. The CASM and CASM are integrated bioenergetics-based and habitat quality models that describe the daily biomass values of selected producer and consumer populations representative of generalized Midwestern farm ponds and emergent wetlands. The CASM demonstrated the ability to reproduce values of population biomass reported for Midwestern (and other) pond ecosystems; the CASM provided a similar modeling capability for Midwestern emergent wetlands. Lethal and sublethal effects of thiamethoxam were modeled as extrapolations of laboratory toxicity assays using the CASM and the CASM . Time series of daily environmental concentrations of thiamethoxam constructed for 6 regional pesticide applications across the United States failed to produce any calculated impacts on modeled population biomass or changes in community structure of modeled trophic guilds in the CASM or the CASM . However, evaluation of systematically increased daily concentrations demonstrated the ability of both models to simulate direct and indirect toxic effects of this pesticide. The present model study suggests that process-based food web/ecosystem models can be used to characterize the potential ecological effects of thiamethoxam on generalized farm pond and emergent wetland ecosystems. Environ Toxicol Chem 2018;37:738-754. © 2017 SETAC.

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“…In Nigeria, studies on chemical toxicity as it applies to aquatic organisms have been carried out (Bostveld et al, 1993;Dambo, 1993;Dieter et al, 1996;Chindah, 1998;Chindah et al, 2000Chindah et al, , 2001. However, systematic studies on pesticide toxicity as it affects mammals are very scanty despite several decades of its introduction, wide use and magnitude.…”

Section: Monocrotophos Was Developed By Shell Chemicalmentioning

confidence: 99%

Monocrotophos–induced enzymatic changes as toxicity bio-markers in Wistar Rat liver

Sunmonu¹,

Oloyede²

2012

ABJNA

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Monocrotophos is an organophosphate pesticide used in agriculture to control a range of insect pests. The aim of this study was to investigate the sub-lethal toxicity of the pesticide at different concentrations on rat liver. Experimental animals were chronically exposed to different concentrations of monocrotophos (0.625, 1.25, 2.5, 5.0 and 10.0 ml/kg body weight/day p.o.) for 14 days. The control rats were placed on borehole water devoid of pesticide. The toxic potential was evaluated using transaminases as bio-markers. Oral administration of the pesticide significantly increased the hepatosomatic index of the animals when compared with the control after 14 days of treatment. A significant reduction was also observed in the activities of aspartate transaminase (AST) and alanine transaminase (ALT) in the liver, which were significantly increased in the serum in a concentration dependent manner following ingestion of the pesticide. The findings from the present study showed that exposure to monocrotophos may compromise normal functioning of the liver.

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The Effect of Phorate on Wetland Macroinvertebrates

Cited by 10 publications

References 16 publications

Methyl parathion toxicity in vegetated and nonvegetated wetland mesocosms

Methyl parathion toxicity in vegetated and nonvegetated wetland mesocosms

Modeling the effects of thiamethoxam on Midwestern farm ponds and emergent wetlands

Monocrotophos–induced enzymatic changes as toxicity bio-markers in Wistar Rat liver

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