Primary succession on Mount St. Helens: long-term permanent plots

  • Creator(s): Roger del Moral
  • PI(s): Roger del Moral
  • Originator(s): Roger del Moral
  • Other researcher(s):
  • Dates of data preparation: Jun 1 1980 - Sep 30 2005
  • Data collection status: Study collection is completed and no new collection is planned
  • Data access: Online
  • Access constraint: Contact senior personnel when data is accessed for use.
  • Last update: Oct 14 2005 (Version 1)
<Citation>     <Acknowledgement>     <Disclaimer>    
del Moral, R. 2005. Primary succession on Mount St. Helens: long-term permanent plots. Mount St. Helens. Forest Science Data Bank, Corvallis, OR. [Database]. Available: Accessed 2023-12-11.
Data sets were provided by the Forest Science Data Bank, a partnership between the Department of Forest Science, Oregon State University, and the U.S. Forest Service Pacific Northwest Research Station, Corvallis, Oregon.
While substantial efforts are made to ensure the accuracy of data and documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is". The FSDB shall not be liable for damages resulting from any use or misinterpretation of data sets.

The data in this database describe the permanent plots collected on Mount St. Helens from 1980 to 2005 by Roger del Moral. Plots occur in mildly impacted tephra, scoured sites on the southwest and northeast portions of the cone, on lahars on the southwest side and devastated sites on the Plains of Abraham, Pumice Plain, Pine Creek Ridge, Toutle Ridge and Studebaker Ridge. These plots permit monitoring of the development of vegetation in a detailed way. Data include species composition, richness, cover, frequency and diversity for each year sampled. Summaries are found at:

The data from these plots have formed the basis of several papers. Citations are available at:

Study Description Taxonomic Hierarchy Download Study Location Information: (CSV)
Ecological Metadata Language: (EML)
1Species cover data by year and plot. (Sep 1 1980 - Sep 1 2005)METADATADATA
2Richness, cover, Hprime, evenness and species frequency by year and plot. (Sep 1 1980 - Sep 1 2005)METADATADATA