Influence of methylmercury from tributary streams on mercury levels in Savannah River Asiatic clams

M. H. Paller, C. H. Jagoe, H. Bennett, H. A. Brant, J. A. Bowers

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Average methylmercury levels in five Savannah River tributary streams, sampled 11 times over 2 years (0.170 ng/l), were nearly twice as high as in the Savannah River (0.085 ng/l). Total mercury levels in the tributaries (2.98 ng/l) did not differ significantly from the river (2.59 ng/l). All of the tributaries drained extensive wetlands that would be expected to support comparatively high rates of methylation. Mercury concentrations in Asiatic clams (Corbicula fluminea) collected from the discharge plumes of Savannah River tributaries (average of 0.044 μg/g wet weight) were significantly (P<0.001) higher than in Asiatic clams collected from the Savannah River upstream from the tributary mouths (average of 0.017 μg/g wet weight). These results indicate that streams draining wetlands into coastal plain rivers can create localized areas of elevated methylmercury with resulting increases in the mercury levels of river biota.

Original languageEnglish (US)
Pages (from-to)209-219
Number of pages11
JournalScience of the Total Environment
Volume325
Issue number1-3
DOIs
StatePublished - Jun 5 2004

Keywords

  • Corbicula
  • Mercury
  • Methylmercury
  • Savannah River
  • Streams
  • Wetlands

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

Fingerprint Dive into the research topics of 'Influence of methylmercury from tributary streams on mercury levels in Savannah River Asiatic clams'. Together they form a unique fingerprint.

  • Cite this