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Effects of temperature, salinity, and sediment organic carbon on methylmercury bioaccumulation in an estuarine amphipod.

Publication ,  Journal Article
Curtis, AN; Bourne, K; Borsuk, ME; Buckman, KL; Demidenko, E; Taylor, VF; Chen, CY
Published in: The Science of the total environment
October 2019

Mercury (Hg) is a global contaminant that poses a human health risk in its organic form, methylmercury (MeHg), through consumption of fish and fishery products. Bioaccumulation of Hg in the aquatic environment is controlled by a number of factors expected to be altered by climate change. We examined the individual and combined effects of temperature, sediment organic carbon, and salinity on the bioaccumulation of MeHg in an estuarine amphipod, Leptocheirus plumulosus, when exposed to sediment from two locations in the Gulf of Maine (Kittery and Bass Harbor) that contained different levels of MeHg and organic carbon. Higher temperatures and lower organic carbon levels individually increased uptake of MeHg by L. plumulosus as measured by the biota-sediment accumulation factor (BSAF), while the effect of salinity on BSAF differed by sediment source. Multi-factor statistical modeling using all data revealed a significant interaction between temperature and organic carbon for both sediments, in which increased temperature had a negative effect on BSAF at the lowest carbon levels and a positive effect at higher levels. Our results suggest that increased temperature and carbon loading, of a magnitude expected as a result from climate change, could be associated with a net decrease in amphipod BSAF of 50 to 71%, depending on sediment characteristics. While these are only first-order projections, our results indicate that the future fate of MeHg in marine food webs is likely to depend on a number of factors beyond Hg loading.

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Published In

The Science of the total environment

DOI

EISSN

1879-1026

ISSN

0048-9697

Publication Date

October 2019

Volume

687

Start / End Page

907 / 916

Related Subject Headings

  • Water Pollutants, Chemical
  • Temperature
  • Salinity
  • Methylmercury Compounds
  • Geologic Sediments
  • Food Chain
  • Estuaries
  • Environmental Sciences
  • Environmental Monitoring
  • Carbon
 

Citation

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ICMJE
MLA
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Curtis, A. N., Bourne, K., Borsuk, M. E., Buckman, K. L., Demidenko, E., Taylor, V. F., & Chen, C. Y. (2019). Effects of temperature, salinity, and sediment organic carbon on methylmercury bioaccumulation in an estuarine amphipod. The Science of the Total Environment, 687, 907–916. https://doi.org/10.1016/j.scitotenv.2019.06.094
Curtis, Amanda N., Kimberly Bourne, Mark E. Borsuk, Kate L. Buckman, Eugene Demidenko, Vivien F. Taylor, and Celia Y. Chen. “Effects of temperature, salinity, and sediment organic carbon on methylmercury bioaccumulation in an estuarine amphipod.The Science of the Total Environment 687 (October 2019): 907–16. https://doi.org/10.1016/j.scitotenv.2019.06.094.
Curtis AN, Bourne K, Borsuk ME, Buckman KL, Demidenko E, Taylor VF, et al. Effects of temperature, salinity, and sediment organic carbon on methylmercury bioaccumulation in an estuarine amphipod. The Science of the total environment. 2019 Oct;687:907–16.
Curtis, Amanda N., et al. “Effects of temperature, salinity, and sediment organic carbon on methylmercury bioaccumulation in an estuarine amphipod.The Science of the Total Environment, vol. 687, Oct. 2019, pp. 907–16. Epmc, doi:10.1016/j.scitotenv.2019.06.094.
Curtis AN, Bourne K, Borsuk ME, Buckman KL, Demidenko E, Taylor VF, Chen CY. Effects of temperature, salinity, and sediment organic carbon on methylmercury bioaccumulation in an estuarine amphipod. The Science of the total environment. 2019 Oct;687:907–916.
Journal cover image

Published In

The Science of the total environment

DOI

EISSN

1879-1026

ISSN

0048-9697

Publication Date

October 2019

Volume

687

Start / End Page

907 / 916

Related Subject Headings

  • Water Pollutants, Chemical
  • Temperature
  • Salinity
  • Methylmercury Compounds
  • Geologic Sediments
  • Food Chain
  • Estuaries
  • Environmental Sciences
  • Environmental Monitoring
  • Carbon