Post-logging community structure and biomass accumulation in Watershed 10, Andrews Experimental Forest , 1974 to present

  • Creator(s): Henry L. Gholz, David Bell
  • PI(s): David Bell
  • Originator(s): Henry L. Gholz
  • Other researcher(s): Jerry F. Franklin, Charles B. Halpern, Robert J. Pabst, Suzanne M. Remillard, Thomas A. Spies, David Carl Shaw
  • Dates of data collection: Jan 1 1973 - Jul 14 2016
  • Data collection status: Study continues and further data collection is planned
  • Data access: Online
  • DOI:
  • Last update: Aug 9 2019 (Version 10)
<Citation>     <Acknowledgement>     <Disclaimer>    
Gholz, H.; Bell, D. 2019. Post-logging community structure and biomass accumulation in Watershed 10, Andrews Experimental Forest , 1974 to present. Long-Term Ecological Research. Forest Science Data Bank, Corvallis, OR. [Database]. Available: Accessed 2024-07-18.
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.
Old-growth and mature Douglas-fir forest were clearcut logged in 1975. Large slash was removed from the site rather than burned. Douglas-fir seedlings were planted in 1976 and 1977, but due to poor survival 4.9 ha were replanted in 1978. Despite planting, most tree stems originated naturally, either as sprouts from cut stumps (hardwoods) or as natural regeneration (conifers and hardwoods). Study plots were established and sampled for cover and frequency of understory vegetation and counts of seedlings and saplings prior to harvest (1973) and resampled annually for cover and biomass of understory vegetation and tree growth from 1976-1981, then in 1983, 1985, and then in 4-6 year intervals. WS10 was intensively studied in the 1970’s and 80’s. The entire watershed was surveyed into a 25 x 25-m grid and then 36 15 by 10 meter plots were established for long-term sampling.

Study Description Study Site Map Taxonomic Hierarchy Download Study Location Information: (CSV)
Ecological Metadata Language: (EML)
1Plant and ground surface cover estimates from microplots (Jul 29 1980 - Jul 14 2016)METADATADATA
2Herb and shrub biomass measurements from microplots (Jun 1 1976 - Aug 11 2010)METADATADATA
3Tagged tree measurements for all tree sizes including saplings in both microplots and macroplot (Jul 29 1976 - Jul 14 2016)METADATADATA
4Pre-logging cover and frequency data by plot (Jun 1 1973 - Sep 30 1973)METADATADATA
5Pre-logging biomass measurements by plot (Jun 1 1973 - Sep 30 1973)METADATADATA
6Pre-logging seedling and sapling count by plot (Jun 1 1973 - Sep 30 1973)METADATADATA
7Biomass parameters used by species and measurement year (Jun 1 1973 - Aug 11 2010)METADATADATA
8Pre-logging tree cover estimates for mature and regenerated trees (Jun 1 1973 - Sep 30 1973)METADATADATA
10Plant and ground surface cover estimates from microplots for early data (Jun 1 1976 - Sep 30 1979)METADATADATA
Methods for data collection from 1976-1979 are unknown at this time

 Sampling Protocols - Description of sampling protocols used for field measurement.

 Long-term growth, mortality and regeneration of trees in permanent vegetation plots in the Pacific Northwest, 1910 to present (TV010)
 Ecosystem dynamics in a mature (Hagan block) and old-growth (Watershed 2) forest, Andrews Experimental Forest, 1981 to present (TP091)
 Plant succession and biomass dynamics following logging and burning in Watersheds 1 and 3, Andrews Experimental Forest, 1962 to Present (TP073)
 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)