Derivation of Predicted No-Effect Concentrations for Lindane, 3,4-Dichloroaniline, Atrazine, and Copper

Girling, A.E.; Tattersfield, Lisa; Mitchell, G.C.; Crossland, N. O.; Pascoe, David D.; Blockwell, S. J.; Maund, S.J.; Taylor, E. J.; Wenzel, Andrea; Janssen, Colin R.; Jüttner, Ingrid

doi:10.1006/eesa.1999.1901

“…The decrease in decomposition rate observed in their study was related to direct copper toxicity affecting invertebrate abundance and community composition. A no‐observed‐effect concentration for copper of 10 μg/L was reported for the feeding rate of detritivorous invertebrates under conditions similar to those in the present study (lotic mesocosms, 35 d of exposure, pH 7.6‐8.0) [33]. In addition, an experiment with G. pulex response showed a lowest‐observed‐effect concentration in terms of population density for copper of 14.6 μg/L [34].…”

Section: Discussionsupporting

confidence: 76%

Alteration of leaf decomposition in copper‐contaminated freshwater mesocosms

Roussel

¹

,

Chauvet

²

,

Bonzom

³

2008

Enviro Toxic and Chemistry

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The influence of copper on leaf litter decomposition was examined in experimental streams. Controls and three levels of contamination (5, 25, and 75 microg/L) were tested in triplicate in 20-m-long mesocosms. Equal quantities of alder, maple, and oak leaves were enclosed in mesh bags and placed in the upper and lower mesocosm sections that exhibited different habitat characteristics (shallow with pebble substrate or deep with fine substrate and macrophytes, respectively). Decomposition rate in the upper section of the 75 micro.g/L mesocosms was significantly reduced to 28% of control values. No significant reductions in the decomposition rate were seen in the lower section. No differences in the leaf-associated mycelial biomass and sporulation rates were observed between treatments, but they were consistently higher in the upper sections. The aquatic hyphomycete community was not affected by the contamination. The abundances of total leaf-associated macroinvertebrates and the dominant shredder (Gammarus pulex) were considerably reduced in the upper sections at 75 microg/L. Therefore, the reduced leaf decomposition probably resulted from a reduction in the abundance of macroinvertebrate detritivores. In addition, local variations in physical and biological characteristics of the habitat along the mesocosms significantly influenced the effects of copper on leaf-associated decomposers.

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“…The decrease in decomposition rate observed in their study was related to direct copper toxicity affecting invertebrate abundance and community composition. A no-observed-effect concentration for copper of 10 g/L was reported for the feeding rate of detritivorous invertebrates under conditions similar to those in the present study (lotic mesocosms, 35 d of exposure, pH 7.6-8.0) [33]. In addition, an experiment with G. pulex response showed a lowest-observedeffect concentration in terms of population density for copper of 14.6 g/L [34].…”

Section: Macroinvertebratessupporting

confidence: 83%

Alteration of leaf decomposition in copper contaminated freshwater mesocosms

Roussel¹,

Chauvet²,

Bonzom³

2007

Environ Toxicol Chem

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The influence of copper on leaf litter decomposition was examined in experimental streams. Controls and three levels of contamination (5, 25, and 75 microg/L) were tested in triplicate in 20-m-long mesocosms. Equal quantities of alder, maple, and oak leaves were enclosed in mesh bags and placed in the upper and lower mesocosm sections that exhibited different habitat characteristics (shallow with pebble substrate or deep with fine substrate and macrophytes, respectively). Decomposition rate in the upper section of the 75 micro.g/L mesocosms was significantly reduced to 28% of control values. No significant reductions in the decomposition rate were seen in the lower section. No differences in the leaf-associated mycelial biomass and sporulation rates were observed between treatments, but they were consistently higher in the upper sections. The aquatic hyphomycete community was not affected by the contamination. The abundances of total leaf-associated macroinvertebrates and the dominant shredder (Gammarus pulex) were considerably reduced in the upper sections at 75 microg/L. Therefore, the reduced leaf decomposition probably resulted from a reduction in the abundance of macroinvertebrate detritivores. In addition, local variations in physical and biological characteristics of the habitat along the mesocosms significantly influenced the effects of copper on leaf-associated decomposers.

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“…PNEC for atenolol (77700 ng L -1 ) was estimated by Jones et al 50 using the software ECOSAR (Ecological Structure Activity Relationships) from the U.S. Environmental Protection Agency. For atrazine, a PNEC of 21 ng L -1 was derived by Girling et al 51 from acute toxicity data using the unicellular algae Scenedesmus subspicatus and an assessment factor of 1000 according to the guidelines from the European Commission. PNEC for DEET and caffeine (5200 ng L -1 ) were based on no-observed effect concentration (NOEC) data for aquatic organisms using an assessment factor of 100.…”

Section: Risk Assessment To the Environment And Human Healthmentioning

confidence: 99%

Seasonal and Spatial Distribution of Caffeine, Atrazine, Atenolol and DEET in Surface and Drinking Waters from the Brazilian Federal District

Sodré¹,

Santana²,

Sampaio³

et al. 2018

J. Braz. Chem. Soc.

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Selected emerging contaminants in water samples from the Brazilian capital were investigated by liquid chromatography-mass spectrometry after solid-phase extraction. In Paranoá Lake, an urban reservoir that will be used to produce drinking water, caffeine was the most abundant contaminant found (average of 53 ng L ). The role of wastewaters discharges could not be evidenced probably due to the water flow and circulation in the lake. However, higher concentrations were detected during the dry season suggesting the presence of point sources, except for atrazine. In source waters, concentrations were lower in comparison with Paranoá Lake waters. Environmental risk assessment shows the need for further surveys for atrazine. For drinking waters, only caffeine and atrazine were detected at average concentrations of 8.6 and 3.2 ng L -1 , respectively. No risk for human health was observed.

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Derivation of Predicted No-Effect Concentrations for Lindane, 3,4-Dichloroaniline, Atrazine, and Copper

Cited by 27 publications

References 64 publications

Alteration of leaf decomposition in copper‐contaminated freshwater mesocosms

Alteration of leaf decomposition in copper‐contaminated freshwater mesocosms

Alteration of leaf decomposition in copper contaminated freshwater mesocosms

Seasonal and Spatial Distribution of Caffeine, Atrazine, Atenolol and DEET in Surface and Drinking Waters from the Brazilian Federal District

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