Ecosystem dynamics in a mature (Hagan block) and old-growth (Watershed 2) forest, Andrews Experimental Forest, 1981 to present

  • Creator(s): Jerry F. Franklin, Mark E. Harmon
  • PI(s): Mark E. Harmon
  • Originator(s): Jerry F. Franklin
  • Other researcher(s): Robert J. Pabst, Charles B. Halpern, Kari B. O'Connell, Steven A. Acker
  • Dates of data collection: Jan 1 1981 - Jan 1 1993
  • Data collection status: Study continues and further data collection is planned
  • Data access: Online
  • Last update: Apr 15 2003 (Version 3)
<Citation>     <Acknowledgement>     <Disclaimer>    
Franklin, J.; Harmon, M. 2003. Ecosystem dynamics in a mature (Hagan block) and old-growth (Watershed 2) forest, Andrews Experimental Forest, 1981 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 goal of the study was to measure tree, shrub, and herb biomass and other parameters for stands of different ages that were unbiased by site selection. These data provide a baseline of information on the structure and composition of naturally regenerated PSME forests in the Western Cascades from which studies of succession and forest productivity changes over time can be made.

Study Description Study Site Map Taxonomic Hierarchy Download Study Location Information: (CSV)
1Microplot Stake Relocation (Jun 16 1992 - Aug 24 1993)METADATAData not online
2Whole Plot Species List (Jun 7 1992 - Sep 10 1993)METADATAData not online
3Cover Estimates in Microplots (Jun 16 1992 - Aug 3 1992)METADATAData not online
4Measures in Microplots for Biomass Estimation (Jun 16 1992 - Aug 5 1992)METADATAData not online
5Line Intercept Cover Data (Jun 16 1992 - Aug 24 1993)METADATAData not online
6Measures in Belt Quadrats for Biomass Estimation METADATAData not online
7Site characteristics - plot level METADATAData not online
8Soil physical and chemical data - Profile level METADATAData not online
9Soil morphological data - Horizon level METADATAData not online
10Herb data 1982 METADATAData not online
11Shrub cover data 1982 METADATAData not online
12Shrub biomass data 1982 METADATAData not online
13Tree data 1982 METADATAData not online

 Sampling protocol (1982) - Sampling protocols for LTER terrestrial vegetation plots in Watershed 2 and Hagan Block

 Long-term growth, mortality and regeneration of trees in permanent vegetation plots in the Pacific Northwest, 1910 to present (TV010)
 Post-logging community structure and biomass accumulation in Watershed 10, Andrews Experimental Forest , 1974 to present (TP041)
 Plant succession and biomass dynamics following logging and burning in Watersheds 1 and 3, Andrews Experimental Forest, 1962 to Present (TP073)
 Pacific Northwest Plant Biomass Component Equation Library (TP072)
 Plant biomass dynamics following logging, burning, and thinning in Watersheds 6 and 7, Andrews Experimental Forest, 1979 to present (TP114)
 Plant biomass dynamics in old-growth Watersheds 8 and 9 at the Andrews Experimental Forest, 2003 to present (TP115)