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An evaluation of the influence of substrate on the response of juvenile freshwater mussels (fatmucket, Lampsilis siliquoidea) in acute water exposures to ammonia

Authors

  • Jingjing Miao,

    1. U.S. Geological Survey, Columbia Environmental Research Center, 4200 New Haven Road, Columbia, Missouri 65201
    2. Fishery College, Ocean University of China, Qingdao, Shandong 266003, People's Republic of China
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  • M. Christopher Barnhart,

    1. Department of Biology, Missouri State University, Springfield, Missouri 65897, USA
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  • Eric L. Brunson,

    1. U.S. Geological Survey, Columbia Environmental Research Center, 4200 New Haven Road, Columbia, Missouri 65201
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  • Douglas K. Hardesty,

    1. U.S. Geological Survey, Columbia Environmental Research Center, 4200 New Haven Road, Columbia, Missouri 65201
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  • Christopher G. Ingersoll,

    1. U.S. Geological Survey, Columbia Environmental Research Center, 4200 New Haven Road, Columbia, Missouri 65201
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  • Ning Wang

    Corresponding author
    1. U.S. Geological Survey, Columbia Environmental Research Center, 4200 New Haven Road, Columbia, Missouri 65201
    • U.S. Geological Survey, Columbia Environmental Research Center, 4200 New Haven Road, Columbia, Missouri 65201.
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Abstract

Acute 96-h ammonia toxicity to three-month-old juvenile mussels (Lampsilis siliquoidea) was evaluated in four treatments (water-only, water-only with feeding, water and soil, and water and sand) using an exposure unit designed to maintain consistent pH and ammonia concentrations in overlying water and in pore water surrounding the substrates. Median effect concentrations (EC50s) for total ammonia nitrogen in the four treatments ranged from 5.6 to 7.7 mg/L and median lethal concentrations (LC50s) ranged from 7.0 to 11 mg/L at a mean pH of 8.4. Similar EC50s or LC50s with overlapping 95% confidence intervals among treatments indicated no influence of substrate on the response of mussels in acute exposures to ammonia. Environ. Toxicol. Chem. 2010;29:2112–2116. © 2010 SETAC

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