DEMO: Vegetation Data - Post-Harvest

  • PI: Charles B. Halpern
  • Originator: Charles B. Halpern
  • Other researchers: Paul D. Anderson, Shelley A. Evans
  • Dates of data collection: Jun 1 1998 - Sep 30 2009
  • Data collection status: Study continues and further data collection is planned
  • Data access: Online
  • Access constraint:
  • Last update: Sep 25 2015 (Version 8)
<Citation>     <Acknowledgement>     <Disclaimer>    
Halpern, C. 2015. DEMO: Vegetation Data - Post-Harvest. Demonstration of Ecosystem Management Options. Forest Science Data Bank, Corvallis, OR. [Database]. Available: (22 April 2018) .
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.

Forest management practices on public lands have changed significantly in the last decade in response to growing concerns that traditional approaches have led to widespread loss and fragmentation of old-growth ecosystems and to declines in the biological diversity associated with late seral forests. New standards and guidelines contained in the Northwest Forest Plan specify the minimum levels and spatial patterns of live trees and coarse woody debris that must be retained on lands subject to timber harvest ("matrix" lands and Adaptive Management Areas). Although these recommendations represent the collective knowledge, experience, and professional judgement of the biologists and ecologists who contributed to the Northwest Forest Plan, the ecological consequences of these new approaches have not been rigorously tested.

In the early 1990s several private research institutions and public interest groups sought federal funding for research to address this need. In 1992, the Pacific Northwest Region (Region 6) of the USDA Forest Service received Congressional direction to establish a major silvicultural experiment in Washington and Oregon "using new forestry and landscape management techniques." The Demonstration of Ecosystem Management Options (DEMO) study evolved as a regional interdisciplinary experiment to examine the responses of diverse groups of forest organisms and processes to variation in the amount or pattern of live trees retained through harvest.

Study Description Study Site Map Taxonomic Hierarchy Download Study Location Information: (CSV)
Download Full Documentation: (PDF)(EML)
1General Plot Characteristics (U-A1) (Jun 1 1998 - Sep 30 1999)METADATADATA
2Comments (memos) for Entity 1 (Jun 1 1998 - Sep 30 2004)METADATADATA
3Bryophyte and Lichen Species' Presence/Absence and Substrate Associations in Harvested and Uncut Plots (U-B1) (Jun 4 1998 - Sep 30 1999)METADATADATA
4Bryophyte and Lichen Total Cover in Harvested and Uncut Plots (U-B1) (Jun 1 1998 - Aug 12 2009)METADATADATA
5Herb Layer in Harvested Plots: Presence/Absence, Number of Tree Seedlings (U-B2) (Jun 4 1998 - Jul 30 2000)METADATADATA
6Herb Layer in Harvested Plots: Cover, Number of Tree Seedlings (U-B2) (Jun 4 1998 - Aug 12 2009)METADATADATA
7Herb Layer in Uncut Plots: Cover, Height, Number of Tree Seedlings (U-B3) (Jun 4 1998 - Aug 12 2009)METADATADATA
8Ground Surface Conditions (U-C) (Jun 4 1998 - Aug 12 2009)METADATADATA
9Tall Shrub and Understory Trees: Cover (U-D1) (Jun 4 1998 - Aug 12 2009)METADATADATA
10Tall Shrub and Understory Trees: Height (U-D2) (Jun 4 1998 - Aug 12 2009)METADATADATA
11Coarse Woody Debris (U-E) (Jun 4 1998 - Aug 12 2009)METADATADATA
12Natural Regeneration (1998, 1999) (U-F) (Jun 1 1998 - Sep 30 1999)METADATADATA
13Overstory Trees (O-A, O-E, and O-G) (Jun 4 1998 - Sep 16 2009)METADATADATA
14Snags (O-B, O-F, and O-F2) (Jun 4 1998 - Sep 16 2009)METADATADATA
15Tree Heights, Post-harvest (O-C) (Sep 9 1999 - Sep 16 2009)METADATADATA
16Percent Overstory Canopy Cover: Truck Mirrors (U-H) (Jun 1 1998 - Oct 1 1999)METADATADATA
17Disturbance Assessment: Cover (U-I1) (Jun 1 1998 - Sep 30 1999)METADATADATA
18Disturbance Assessment: Slash Depth (U-I2) (Jun 1 1998 - Sep 30 1999)METADATADATA
19Planted Trees (U-G, U-G2) (Aug 22 1998 - Sep 16 2009)METADATADATA
20Plot Photo Comments (Jun 1 1996 - Sep 30 2006)METADATADATA
21Tree Mortality (O-D) (Sep 10 1999 - Sep 16 2009)METADATADATA
24Natural Regeneration (U-F2) (Jun 28 2003 - Sep 19 2009)METADATADATA
25Height and Leader Growth of Tagged Natural Regeneration (U-F3) (Jun 1 2003 - Sep 30 2003)METADATADATA

 Field manual - trees - DEMO establishment report field manual for overstory and understory trees (2009)
 Field manual - understory vegetation - DEMO establishment report field manual for understory vegetation (2008)
 DEMO - DEMO website at PNW

 DEMO: Vegetation Data - Pre-Harvest (TP104)