Water, Air, and Soil Pollution

, Volume 27, Issue 3–4, pp 441–444 | Cite as

Equisetum and the cycling of mercury at Mount St. Helens: Plant-soil relations, 1980–1984

  • S. M. Siegel
  • B. Z. Siegel


The Hg content ofEquisetum shoots at six stations near Mount St. Helens rose to a peak value in July 1982, 26 mo after the great eruption of May 1981.

The July 1982 peak in plant Hg content was followed by a continual decline in plant tissue Hg at all six stations as measured in September 1982 and August 1984. During this 2 yr period, soil Hg levels declined at only three of the six stations, while remaining essentially unchanged at two stations and increasing nearly 20-fold at one station. Therefore, soil Hg behaved independently with respect to plant Hg at least at three of the six sites.

This follow-up study at Mount St. Helens supports the notion of a major source of atmospheric mercury which is taken up directly by plants.


Mercury Plant Tissue Atmospheric Mercury Great Eruption 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© D. Reidel Publishing Company 1986

Authors and Affiliations

  • S. M. Siegel
    • 1
  • B. Z. Siegel
    • 2
  1. 1.Department of BotanyUniversity of Hawaii at Manoa HonoluluUSA
  2. 2.Pacific Biomedical Research CenterUniversity of Hawaii at Manoa HonoluluUSA

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