Forest structure and biomass in early successional harvest units of the Andrews Experimental Forest (ESSA), 1999 to present

  • Creator(s): Mark E. Harmon, Kari B. O'Connell
  • PI(s): Mark E. Harmon
  • Originator(s): Kari B. O'Connell
  • Other researcher(s): Mark E. Harmon, Robert J. Pabst, Charles B. Halpern, Steven A. Acker, Howard Bruner
  • Dates of data collection: Jun 1 1999 - Oct 1 2000
  • Data collection status: Study continues and further data collection is planned
  • Data access: Online
  • Last update: Jun 22 2005 (Version 2)
<Citation>     <Acknowledgement>     <Disclaimer>    
Harmon, M.; O'Connell, K. 2005. Forest structure and biomass in early successional harvest units of the Andrews Experimental Forest (ESSA), 1999 to present. Long-Term Ecological Research. Forest Science Data Bank, Corvallis, OR. [Database]. Available: Accessed 2024-06-15.
Data were provided by the HJ Andrews Experimental Forest research program, funded by the National Science Foundation's Long-Term Ecological Research Program (DEB 2025755), US Forest Service Pacific Northwest Research Station, and Oregon State University.
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 Andrews LTER shall not be liable for damages resulting from any use or misinterpretation of data sets.

The objectives of this effort were to characterize species presence, cover, and biomass for herbs, shrubs, and tree regeneration, and to quantify tree regeneration by species and size class. The proposed scheme includes the following elements:

  1. cover of shrubs and tree regeneration
  2. herb cover
  3. biomass of erect shrubs
  4. tree seedlings and saplings
  5. Compile a complete species list of vascular plants

Study Description Taxonomic Hierarchy Download Study Location Information: (CSV)
Ecological Metadata Language: (EML)
1Plot_level data METADATADATA
5Understory line intercept data METADATADATA
6Diameter classes for Shrubs, seedlings and saplings,10x0.5m METADATADATA
7Herb and low shrub cover in 1m x 1m plots METADATADATA
8Tree seedling height classes (10m x 0.5m transects) METADATADATA
9Plot species lists METADATADATA