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Science 31 July 1981:
Vol. 213. no. 4507, pp. 537 - 539
DOI: 10.1126/science.213.4507.537
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Articles

Initial Effects of Ashfall from Mount St. Helens on Vegetation in Eastern Washington and Adjacent Idaho

RICHARD N. MACK 1

1 Department of Botany, Washington State University, Pullman 99164

Extensive plant damage from the 18 May 1980 eruption of Mount St. Helens was largely restricted to acaulescent andprostrate dicot species in the ashfall area east of the Cascade Range (more than 150 kilometersfrom the vent). Veratrum californicum, a large monocot, displayed widespread stem death through mechanical overloading of the plant's clasping leaves. The ash surface in this area presents new opportunities for both seeds and seed predators.

Submitted on March 17, 1981
Revised on May 22, 1981


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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