Effects of chronic low concentrations of the pesticides chlorpyrifos and atrazine in indoor freshwater microcosms

Brink, Paul J. Van den; Donk, E. Van; Gylstra, R.; Crum, S.J.H.; Brock, T.C.M.

doi:10.1016/0045-6535(95)00180-g

Cited by 79 publications

(76 citation statements)

References 22 publications

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“…Effects are hardly ever observed at insecticide concentrations below 0.1 TU mso . One exception forms a study on a chronic exposure to chlorpyrifos (Van den Brink et al, 1995). For the previously mentioned four categories, more or less clear concentration-effect relationships are present (Fig.…”

Section: Effects Of Acetylcholinesterase Inhibitorsmentioning

confidence: 99%

Threshold Levels for Effects of Insecticides in Freshwater Ecosystems: A Review

2005

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Abstract. A literature review of freshwater (model) ecosystem studies with neurotoxic insecticides was performed to assess ecological threshold levels, to compare these levels with the first tier approach within European Union (EU) administration procedures, and to evaluate the ecological consequences of exceeding these thresholds. Studies published between 1980 and 2001 were reviewed. Most studies covered organophosphates and synthetic pyrethroids in lentic waters. The most sensitive taxa were representatives of crustaceans, insects and fish. Based on toxic units, threshold values were equivalent for compounds with a similar mode of action. This also accounted for the nature and magnitude of direct effects at higher concentrations. Although laboratory single species toxicity tests may not allow predictions on precise ecological effects, some generalisations on effects and recovery can be made with respect to acute standard laboratory EC 50 data. The NOEC ecosystem usually is a factor of 10 or more higher than first tier acceptable concentrations, particularly in the case of single applications and acetylcholinesterase inhibitors. Acceptable concentrations, as set by the EU first tier approach, appear to be protective. Recovery of sensitive endpoints usually occurs within 2 months of the (last) application when peak concentrations remain lower than (0.1-1) · EC 50 of the most sensitive standard test species. The consistency of response patterns found in model ecosystem studies can be useful when estimating the ecological risks of pesticides. The use of an effect classification system was also helpful in evaluating effects.

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Section: Effects Of Acetylcholinesterase Inhibitorsmentioning

confidence: 99%

Threshold Levels for Effects of Insecticides in Freshwater Ecosystems: A Review

2005

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“…CPY has been the subject of several studies in indoor and outdoor cosms representing Dutch ditches at the Winand Staring Center, The Netherlands. The indoor cosms (Brock et al 1992 ;1993 ;Cuppen et al 1995 ;van den Brink et al 1995 ;Van Donk et al 1995 ) were sprayed once, with an initial concentration of 35 μg CPY L −1 . Direct effects were observed on cladocerans, copepods, amphipods, isopods, and insects.…”

Section: Evidence From Microcosms and Mesocosmsmentioning

confidence: 99%

Risks to Aquatic Organisms from Use of Chlorpyrifos in the United States

Giddings¹,

Williams

Solomon

et al. 2014

Reviews of Environmental Contamination and Toxicology

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“…and Polyarthra sp was from 68, 132, and 318 g/L atrazine, respectively. Van den Brink et al (1995) detected only slight reductions in primary productivity over 7 weeks in multispecies microcosms exposed to 5 g/L atrazine, and observed no significant effects on cyclopoid and cladoceran species or on the amphipod Gammarus and the rotifer Keratella. Lozano et al (1992) studied the temporal variation in abundance (% of control) of zooplankton following a single dose of esfenvalerate in 5 different concentrations (0.01, 0.08, 0.2, 1.0, 5.0 g/L).…”

Section: Field Studies Mesocosms and Microcosms Involving Herbicidmentioning

confidence: 99%