Validation of a biotic ligand model on site-specific copper toxicity to Daphnia magna in the Yeongsan River, Korea

The results of investigation of inorganic and organic speciation of copper compounds in the lake Modrac, using the geochemical equilibrium model BLM (Biotic Ligand Model; USEPA 2007) and other geochemical models are presented, as well as toxicity and bioavailability of copper compounds in the lake Modrac for chosen biotic ligand of fish fathead minnow (Pimephales promelas). Speciation and bioavailability of copper complexes was investigated and toxicity levels for chosen biotic ligand determined. The influence of water chemistry on copper toxicity is predominant, and application of sophisticated BLM model enables the prediction of toxicity and bioavailability of copper.

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PREDICTING ACUTE ZINC TOXICITY FOR DAPHNIA MAGNA AS A FUNCTION OF KEY WATER CHEMISTRY CHARACTERISTICS: DEVELOPMENT AND VALIDATION OF A BIOTIC LIGAND MODEL

Environmental Toxicology and Chemistry ◽

10.1897/1551-5028(2002)021<1309:paztfd>2.0.co;2 ◽

2002 ◽

Vol 21 (6) ◽

pp. 1309 ◽

Cited By ~ 16

Author(s):

Dagobert G. Heijerick ◽

Karel A.C. De Schamphelaere ◽

Colin R. Janssen

Keyword(s):

Water Chemistry ◽

Daphnia Magna ◽

Biotic Ligand Model ◽

Zinc Toxicity ◽

Biotic Ligand ◽

Characteristics Development ◽

Development And Validation ◽

Ligand Model

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Copper toxicity for Scinax ruber and Rhinella granulosa (Amphibia: Anura) of the Amazon: Potential of Biotic Ligand Model to predict toxicity in urban streams

Acta Amazonica ◽

10.1590/1809-4392201400383 ◽

2014 ◽

Vol 44 (4) ◽

pp. 491-498 ◽

Cited By ~ 6

Author(s):

Jorge Felipe Oliveira Franco-de-Sá ◽

Adalberto Luis Val

Keyword(s):

Copper Toxicity ◽

Emerging Diseases ◽

Biotic Ligand Model ◽

Tropical Species ◽

Black Water ◽

Promising Tool ◽

Physical Chemical ◽

Natural Streams ◽

Biotic Ligand ◽

Ligand Model

In the last years many populations of anurans have declined and extinctions have been recorded. They were related to environmental pollution, changes of land use and emerging diseases. The main objective of this study was to determine copper sensitivity of the anuran of the Amazon Rhinella granulosa and Scinax ruber tadpoles at stage 25 and Scinax ruber eggs exposed for 96 h to copper concentrations ranging from 15 µg Cu L-1 to 94 µg Cu L-1. LC50 at 96 h of Rhinella granulosa Gosner 25, Scinax ruber Gosner 25 and Scinax ruber eggs in black water of the Amazon were 23.48, 36.37 and 50.02 µg Cu L-1, respectively. The Biotic Ligand Model was used to predict the LC50 values for these species and it can be considered a promising tool for these tropical species and water conditions. Copper toxicity depends on water physical-chemical composition and on the larval stage of the tadpoles. The Gosner stage 19-21 (related to the appearance of external gills) is the most vulnerable and the egg stage is the most resistant. In case of contamination by copper, the natural streams must have special attention, since copper is more bioavailable.

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Measured Copper Toxicity toCnesterodon decemmaculatus(Pisces: Poeciliidae) and Predicted by Biotic Ligand Model in Pilcomayo River Water: A Step for a Cross-Fish-Species Extrapolation

Journal of Toxicology ◽

10.1155/2012/849315 ◽

2012 ◽

Vol 2012 ◽

pp. 1-11 ◽

Cited By ~ 5

Author(s):

María Victoria Casares ◽

Laura I. de Cabo ◽

Rafael S. Seoane ◽

Oscar E. Natale ◽

Milagros Castro Ríos ◽

...

Keyword(s):

Water Quality ◽

River Water ◽

Fish Species ◽

Toxicity Test ◽

Copper Toxicity ◽

Quality Parameters ◽

Biotic Ligand Model ◽

Biotic Ligand ◽

Species Extrapolation ◽

Ligand Model

In order to determine copper toxicity (LC50) to a local species (Cnesterodon decemmaculatus) in the South American Pilcomayo River water and evaluate a cross-fish-species extrapolation of Biotic Ligand Model, a 96 h acute copper toxicity test was performed. The dissolved copper concentrations tested were 0.05, 0.19, 0.39, 0.61, 0.73, 1.01, and 1.42 mg CuL-1. The 96 h Cu LC50 calculated was 0.655 mgL-1(0.823-0.488). 96-h Cu LC50 predicted by BLM forPimephales promelaswas 0.722 mgL-1. Analysis of the inter-seasonal variation of the main water quality parameters indicates that a higher protective effect of calcium, magnesium, sodium, sulphate, and chloride is expected during the dry season. The very high load of total suspended solids in this river might be a key factor in determining copper distribution between solid and solution phases. A cross-fish-species extrapolation of copper BLM is valid within the water quality parameters and experimental conditions of this toxicity test.

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