Effects of the pyrethroid insecticide cypermethrin on a freshwater community studied under field conditions. II. Direct and indirect effects on the species composition

Wendt-Rasch, Lina; Friberg-Jensen, Ursula; Woin, Per; Christoffersen, Kirsten

doi:10.1016/s0166-445x(02)00202-3

Cited by 47 publications

(24 citation statements)

References 33 publications

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“…Giddings et al suggested that the HC5 may actually over‐estimate risk in some cases, because activities such as reproductive rates, resistance, immigration, recovery, and refugia are not accounted for. In addition, Wendt‐Rasch et al observed top‐down effects to planktonic community assemblage after exposure to cypermethrin (e.g., direct toxicity on crustaceans caused indirect effects on the abundance and community structure of planktonic species). Interestingly, indirect effects on fish, however, were not observed in a mesocosm study when direct effects were observed in invertebrates after exposure to pyrethroids, suggesting that a diversity of food sources might alleviate indirect effects on fish .…”

Section: Resultsmentioning

confidence: 99%

Application of species sensitivity distribution in aquatic probabilistic ecological risk assessment of cypermethrin: A case study in an urban stream in South China

You

2015

Enviro Toxic and Chemistry

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A tiered ecological risk assessment was applied to quantitatively refine the overall probabilistic risk of cypermethrin, a pyrethroid insecticide, to aquatic organisms. These results were then validated through the bioassays using field water from an urban stream, Chebei Creek in Guangzhou, South China. Seventeen water samples were collected along Chebei Creek for evaluation. In total, 71% of the field waters were acutely toxic to Hyallela azteca and 24% of the waters caused 100% mortality. Toxic unit evaluation suggested that cypermethrin was one of the main contributors to toxicity. The tiered ecological risk assessment approach (deterministic quotient method and probabilistic methods, including joint probability curve and Monte Carlo Simulation) suggested that cypermethrin posed significant threats to aquatic ecology in this stream. The overall probabilistic risk of cypermethrin to aquatic species in Chebei Creek reached 66% when acute-to-chronic ratios were set at 125. An exceedance probability of cypermethrin in Chebei Creek that affected H. azteca as modeled using the joint probability curve method was 88%, suggesting that most sites were at risk due to cypermethrin exposure. This value was similar to the results obtained from acute toxicity tests (71% of field water samples were acutely toxic to H. azteca), indicating the effectiveness of the tiered approach to assess risk of cypermethrin in urban waterways. To the authors' knowledge, the present study is the first to provide a focused probabilistic evaluation of ecological risk for cypermethrin in a complex urban waterway environment. Despite uncertainties existing in the ecological risk assessment procedure, this approach provides a comprehensive assessment of ecological risk of cypermethrin, and subsequently, a foundation for further risk diagnosis and management in urban waterways. Environ Toxicol Chem 2015;34:640-648. # 2014 SETAC

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Section: Resultsmentioning

confidence: 99%

Application of species sensitivity distribution in aquatic probabilistic ecological risk assessment of cypermethrin: A case study in an urban stream in South China

You

2015

Enviro Toxic and Chemistry

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“…The points are the averages of three replicas the influence of the herbicide, showed no difference in relation to the control, leading to the hypothesis that the concentration of quinclorac restricted the amount of food available, thereby compromising the zooplankton community of the system. The direct and indirect effects of pesticides on the plankton community have been highlighted by different studies (Barry and Logan 1998;Hanazato 2001;Preston 2002;Wendt-Rasch et al 2003). As highlighted by Preston (2002), the indirect effects may be a significant source of uncertainty in the estimates of ecological risk, leading to cautious interpretations in terms of decision-making in scenarios of environmental impact.…”

Section: Discussionmentioning

confidence: 99%

Risk analysis of herbicide quinclorac residues in irrigated rice areas, Santa Catarina, Brazil

et al. 2007

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Deterministic and probabilistic risk analyses were carried out for seven hydrographic basins in the State of Santa Catarina (Brazil), where irrigated rice is cultivated. Monitoring studies conducted in 1998/1999 and 1999/2000 had found that the herbicide quinclorac was the most frequently detected agrochemical residue, occurring in five of the seven hydrographic basins. In order to assess the ecological risk posed by quinclorac, median lethal concentration (LC(50)) and median effective concentration (EC(50)) data were obtained for quinclorac in toxicity tests with organisms routinely used in Brazil for this purpose. Experiments were carried out on microcosms associated with the irrigated rice crop to evaluate the effects of the herbicide on the natural plankton community. The deterministic analyses showed that the risk presented by the herbicide residues to the phytoplankton require mitigating action, while the probabilistic analysis revealed that the levels of risk for the aquatic community were acceptable. Field experiments showed that the recommended application concentration of the product directly affects phytoplankton and has an indirect, short-term effect on the zooplankton community.

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“…Cypermetrin, according to Wendt-Rasch et al (2003), promoted a change on the composition of species, increasing the phytoplankton population on concentrations higher than 0.13 µg L -1 . Fungicides pyraclostrobin + epoxiconazole promote high toxicity for the microcrustaceans Daphnia similis and the fish species tambaqui (Colossoma macropomum), both in combination and in isolation (Prestes et al, 2012(Prestes et al, , 2013.…”

Section: Comparative Analysis Across Bioindicators Ecotoxicological mentioning

confidence: 99%

Macrophyte Bioassay Applications for Monitoring Pesticides in the Aquatic Environment

et al. 2016

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RESUMO -O objetivo deste estudo foi avaliar a viabilidade na utilização das macrófitas Lemna minor e Azolla caroliniana como bioindicadores de exposição (toxicidade aguda) dos herbicidas atrazina, bentazon + imazamox e clomazone, do inseticida alfacipermetrina + teflubenzuron e dos fungicidas piraclostrobina e mistura piraclostrobina + epoxiconazol, bem como o risco de intoxicação ambiental. Para isso, foram selecionadas quatro plantas de L. minor e cinco de A. caroliniana em 50 mL de meio de cultivo Hoagland. Em ambas as plantas foram utilizadas as concentrações de 0,10, 1,07, 3,44, 11,16, 36,40

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Effects of the pyrethroid insecticide cypermethrin on a freshwater community studied under field conditions. II. Direct and indirect effects on the species composition

Cited by 47 publications

References 33 publications

Application of species sensitivity distribution in aquatic probabilistic ecological risk assessment of cypermethrin: A case study in an urban stream in South China

Application of species sensitivity distribution in aquatic probabilistic ecological risk assessment of cypermethrin: A case study in an urban stream in South China

Risk analysis of herbicide quinclorac residues in irrigated rice areas, Santa Catarina, Brazil

Macrophyte Bioassay Applications for Monitoring Pesticides in the Aquatic Environment

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