Development of biotic ligand models for chronic manganese toxicity to fish, invertebrates, and algae

Peters, Adam; Lofts, Stephen; Merrington, Graham; Brown, Bruce; Stubblefield, William; Harlow, Keven. 2011 Development of biotic ligand models for chronic manganese toxicity to fish, invertebrates, and algae. Environmental Toxicology and Chemistry, 30 (11). 2407-2415.

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Ecotoxicity tests were performed with fish, invertebrates, and algae to investigate the effect of water quality parameters on Mn toxicity. Models were developed to describe the effects of Mn as a function of water quality. Calcium (Ca) has a protective effect on Mn toxicity for both fish and invertebrates, and magnesium (Mg) also provides a protective effect for invertebrates. Protons have a protective effect on Mn toxicity to algae. The models derived are consistent with models of the toxicity of other metals to aquatic organisms in that divalent cations can act as competitors to Mn toxicity in fish and invertebrates, and protons act as competitors to Mn toxicity in algae. The selected models are able to predict Mn toxicity to the test organisms to within a factor of 2 in most cases. Under low-pH conditions invertebrates are the most sensitive taxa, and under high-pH conditions algae are most sensitive. The point at which algae become more sensitive than invertebrates depends on the Ca concentration and occurs at higher pH when Ca concentrations are low, because of the sensitivity of invertebrates under these conditions. Dissolved organic carbon concentrations have very little effect on the toxicity of Mn to aquatic organisms.

Item Type: Publication - Article
Digital Object Identifier (DOI):
Programmes: CEH Topics & Objectives 2009 - 2012 > Biogeochemistry > BGC Topic 3 - Managing Threats to Environment and Health > BGC - 3.2 - Provide the evidence base for setting Environment Quality Standards ...
CEH Sections/Science Areas: Shore
ISSN: 0730-7268
Additional Keywords: metal toxicity, metal bioavailability, biotic ligand model, manganese, water quality guidelines
NORA Subject Terms: Ecology and Environment
Date made live: 27 Oct 2011 16:02 +0 (UTC)

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