Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (460 KB bytes)

Title: 25 years of ecological change at Mount St. Helens.

Author: Dale, V.H.; Crisafulli, C.M.; Swanson, F.J.;

Date: 2005

Source: Science, Vol. 308: 961-962

Publication Series: Scientific Journal (JRNL)

Description: 18 May 2005 marks the 25th anniversary of the massive eruption of Mount St. Helens. This eruption involved diverse geological processes (1) that disturbed forests, meadows, lakes, an drivers (2) (see the figure). A huge landslide and searing flows of hot gases and pumic framents (pyroclastic flows) inundated 60 km2 of land, obliterating preexisting ecosystems and landforms. A steam-driven blast left blown-down forest and scorched standing forest over more than 500 km2, but deposited generally <1 m of new material. A gentle rain of tephra (airborne volcanic rock fragments) fell from the sky and blanketed >1000 km2 of live forest and aquatic systems with >5 cm of deposits (2). The initial impression of a lifeless landscape quickly changed as surviving plants and animals reemerged.

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.



Dale, V.H.; Crisafulli, C.M.; Swanson, F.J. 2005. 25 years of ecological change at Mount St. Helens. Science, Vol. 308: 961-962


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.