DEMO: Vegetation Data - Pre-Harvest

  • Creator(s): Charles B. Halpern
  • PI(s): Charles B. Halpern
  • Originator(s): Charles B. Halpern
  • Other researcher(s): Shelley A. Evans
  • Dates of data collection: Jul 1 1994 - Oct 31 1997
  • Data collection status: Study collection is completed and no new collection is planned
  • Data access: Online
  • Last update: May 2 2018 (Version 6)
<Citation>     <Acknowledgement>     <Disclaimer>    
Halpern, C. 2018. DEMO: Vegetation Data - Pre-Harvest. Demonstration of Ecosystem Management Options. Forest Science Data Bank, Corvallis, OR. [Database]. Available: Accessed 2024-05-21.
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)
Ecological Metadata Language: (EML)
1Physical and Site Characteristics (U-A1) (Jun 15 1994 - Sep 28 1996)METADATADATA
2Transect Bearings and Rebar Placement (U-A2) (Jun 15 1994 - Sep 11 1996)METADATAData not online
Data are in TP108 entity 2.
3Percent Overstory Canopy Cover: Moosehorn Densiometer (U-A) (Jun 15 1994 - Sep 11 1996)METADATADATA
4Herb Layer Cover and Height, Numbers of Tree Seedlings (U-B) (Jun 15 1994 - Sep 11 1996)METADATADATA
5Ground Surface Conditions (U-C) (Jun 15 1994 - Jul 11 1997)METADATADATA
6Tall Shrub and Understory Tree Layer: Cover (U-D1) (Jun 15 1994 - Sep 11 1996)METADATADATA
7Tall Shrub and Understory Tree Layer: Height (U-D2) (Jun 15 1994 - Sep 11 1996)METADATADATA
8Coarse Woody Debris (U-E) (Jun 15 1994 - Sep 11 1996)METADATADATA
9Density of Understory Trees (U-F) (Aug 16 1994 - Sep 11 1996)METADATADATA
10Pre-Harvest Tree Diameters (O-A) (Jun 15 1994 - Sep 11 1996)METADATADATA
11Snag Measurements (O-B) (Jun 2 1994 - Oct 31 1996)METADATADATA
12Tree Heights (Jun 5 1995 - Jul 2 1997)METADATADATA
13DEMO Grid Point Data (Jun 16 1994 - Jan 10 1997)METADATADATA
14Percent Overstory Canopy Cover: Truck Mirrors (U-H) (Apr 3 1997 - Apr 7 1998)METADATADATA
15Preharvest Disturbance: Stumps and Skid Roads (U-I) (May 14 1997 - Jul 15 1997)METADATADATA
16Preharvest Disturbance: Tree Falls and Tree Breakage (U-J) (Apr 8 1997 - Nov 5 1997)METADATADATA
17Epiphytic Lichen Biomass (Jun 5 1995 - Oct 31 1996)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 Arthropods (2003-2004) (TS018)
 Microclimatic variation associated with dispersed and aggregated retention harvests in western Washington (DEMO). (MS034)
 DEMO Pre-Harvest Invertebrates (TS016)
 DEMO Fungi Data (TP109)
 DEMO Wildlife Study: Arboreal Rodents, Small Mammals, Amphibians, and Birds (1993-2001) (WE015)
 Demonstration of Ecosystem Management Options (DEMO) Study, western Oregon and Washington (post-treatment data, 1998-2016) (TP108)
 DEMO: Seedling Data - Post-Harvest (TP124)