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Influence of dissolved organic matter on acute toxicity of zinc to larval fathead minnows (Pimephales promelas).
Arch Environ Contam Toxicol. 2006 Oct; 51(3):438-44.AE

Abstract

We conducted laboratory toxicity tests in support of the development of a biotic ligand model (BLM) to predict acute toxicity of zinc (Zn) to fathead minnows (Pimephales promelas). To test the effect of dissolved organic matter (DOM) on Zn toxicity, we exposed larval fathead minnows to Zn in water containing elevated concentrations of dissolved organic carbon (DOC) in 96-h static-renewal toxicity tests. We tested DOM isolated from four surface waters: Cypress Swamp, Delaware; Edisto River, South Carolina; Suwannee River, Georgia; and Wilmington, Delaware, wastewater treatment effluent. The DOM isolates from the Edisto River and Wilmington wastewater treatment effluent contained elevated concentrations of NaCl (20-110x control NaCl) due to the use of a Na+-exchange resin to remove Ca2+ and Mg2+ during the DOM isolation process. Therefore, we also performed Zn toxicity tests in which we added up to 20 mM NaCl to exposure solutions containing Cypress Swamp and Suwannee River DOM. A threshold concentration of 11 mg DOC/L was needed to decrease Zn toxicity, after which the 96 h Zn LC50 was positively correlated with DOC concentration. Elevated NaCl concentrations did not alter Zn toxicity in the presence of DOM. In conjunction with data from other studies with fish and invertebrates, results of this study were used to calibrate Version 2.1.1 of the Zn BLM. BLM-predicted LC50s for our exposure waters containing elevated DOM concentrations were within the range of acceptable deviation relative to the observed LC50s (i.e., 0.5-2x observed LC50s); however, BLM-predicted LC50s for our exposure waters containing < 1 mg DOC/L were 2-3x lower than the observed LC50s (i.e., the BLM over-predicted the toxicity). Therefore, the current composite-species BLM for Zn could be improved for fathead minnows if that species were modeled separately from the other species used to calibrate Version 2.1.1.

Authors+Show Affiliations

Bringolf RB
Department of Zoology and Physiology, University of Wyoming, Laramie, WY 82071, USA.
Morris BA
No affiliation info available
Boese CJ
No affiliation info available
Santore RC
No affiliation info available
Allen HE
No affiliation info available
Meyer JS
No affiliation info available

MeSH

AnimalsCyprinidaeHumic SubstancesLarvaSolubilityToxicity Tests, AcuteWater Pollutants, ChemicalZinc

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

16788742

Citation

Bringolf, Robert B., et al. "Influence of Dissolved Organic Matter On Acute Toxicity of Zinc to Larval Fathead Minnows (Pimephales Promelas)." Archives of Environmental Contamination and Toxicology, vol. 51, no. 3, 2006, pp. 438-44.
Bringolf RB, Morris BA, Boese CJ, et al. Influence of dissolved organic matter on acute toxicity of zinc to larval fathead minnows (Pimephales promelas). Arch Environ Contam Toxicol. 2006;51(3):438-44.
Bringolf, R. B., Morris, B. A., Boese, C. J., Santore, R. C., Allen, H. E., & Meyer, J. S. (2006). Influence of dissolved organic matter on acute toxicity of zinc to larval fathead minnows (Pimephales promelas). Archives of Environmental Contamination and Toxicology, 51(3), 438-44.
Bringolf RB, et al. Influence of Dissolved Organic Matter On Acute Toxicity of Zinc to Larval Fathead Minnows (Pimephales Promelas). Arch Environ Contam Toxicol. 2006;51(3):438-44. PubMed PMID: 16788742.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Influence of dissolved organic matter on acute toxicity of zinc to larval fathead minnows (Pimephales promelas). AU - Bringolf,Robert B, AU - Morris,Brady A, AU - Boese,Connie J, AU - Santore,Robert C, AU - Allen,Herbert E, AU - Meyer,Joseph S, Y1 - 2006/06/20/ PY - 2005/05/16/received PY - 2005/10/27/accepted PY - 2006/6/22/pubmed PY - 2006/9/22/medline PY - 2006/6/22/entrez SP - 438 EP - 44 JF - Archives of environmental contamination and toxicology JO - Arch Environ Contam Toxicol VL - 51 IS - 3 N2 - We conducted laboratory toxicity tests in support of the development of a biotic ligand model (BLM) to predict acute toxicity of zinc (Zn) to fathead minnows (Pimephales promelas). To test the effect of dissolved organic matter (DOM) on Zn toxicity, we exposed larval fathead minnows to Zn in water containing elevated concentrations of dissolved organic carbon (DOC) in 96-h static-renewal toxicity tests. We tested DOM isolated from four surface waters: Cypress Swamp, Delaware; Edisto River, South Carolina; Suwannee River, Georgia; and Wilmington, Delaware, wastewater treatment effluent. The DOM isolates from the Edisto River and Wilmington wastewater treatment effluent contained elevated concentrations of NaCl (20-110x control NaCl) due to the use of a Na+-exchange resin to remove Ca2+ and Mg2+ during the DOM isolation process. Therefore, we also performed Zn toxicity tests in which we added up to 20 mM NaCl to exposure solutions containing Cypress Swamp and Suwannee River DOM. A threshold concentration of 11 mg DOC/L was needed to decrease Zn toxicity, after which the 96 h Zn LC50 was positively correlated with DOC concentration. Elevated NaCl concentrations did not alter Zn toxicity in the presence of DOM. In conjunction with data from other studies with fish and invertebrates, results of this study were used to calibrate Version 2.1.1 of the Zn BLM. BLM-predicted LC50s for our exposure waters containing elevated DOM concentrations were within the range of acceptable deviation relative to the observed LC50s (i.e., 0.5-2x observed LC50s); however, BLM-predicted LC50s for our exposure waters containing < 1 mg DOC/L were 2-3x lower than the observed LC50s (i.e., the BLM over-predicted the toxicity). Therefore, the current composite-species BLM for Zn could be improved for fathead minnows if that species were modeled separately from the other species used to calibrate Version 2.1.1. SN - 0090-4341 UR - https://www.unboundmedicine.com/medline/citation/16788742/Influence_of_dissolved_organic_matter_on_acute_toxicity_of_zinc_to_larval_fathead_minnows__Pimephales_promelas__ L2 - https://dx.doi.org/10.1007/s00244-005-0088-6 DB - PRIME DP - Unbound Medicine ER -