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TP108

Demonstration of Ecosystem Management Options (DEMO) Study, western Oregon and Washington (post-treatment data, 1998-2016)

  • PI: Charles B. Halpern
  • Originator: Charles B. Halpern
  • Other researchers: Paul D. Anderson, Shelley A. Evans
  • Dates of data collection: Jun 15 1994 - Aug 31 2016
  • Data collection status: Study continues and further data collection is planned
  • Data access: Online
  • Last update: Aug 9 2018 (Version 9)
<Citation>     <Acknowledgement>     <Disclaimer>    
Halpern, C. 2018. Demonstration of Ecosystem Management Options (DEMO) Study, western Oregon and Washington (post-treatment data, 1998-2016). Demonstration of Ecosystem Management Options. Forest Science Data Bank, Corvallis, OR. [Database]. Available: http://andlter.forestry.oregonstate.edu/data/abstract.aspx?dbcode=TP108 (18 June 2019) .
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.
ABSTRACT:

The Demonstration of Ecosystem Management Options (DEMO) Study is a regional-scale experiment in variable-retention harvest, established at six sites in western Oregon and Washington. Initiated in 1994, DEMO was designed to assess newly established standards and guidelines for regeneration harvests in mature, coniferous forests of the Pacific Northwest. The experiment is a randomized complete block design. It includes six treatments that represent strong contrasts in the level of retention (15-100% of original basal area) and the spatial pattern in which trees are retained (uniformly dispersed vs. aggregated in 1-ha patches). The factorial nature of the design (15 and 40% retention in both an aggregated and dispersed pattern) is unique among variable-retention experiments, regionally and globally.

Long-term measurements of vegetation response lie at the core the DEMO Study. Key response variables include overstory tree growth and mortality, the dynamics of snags, regeneration of conifers (including planted seedlings and natural recruitment), and the composition, structure and diversity of the understory (including herbaceous, woody, and bryophyte species). Pre-treatment measurements were made between 1994 and 1996 (data are archived under Study Code TP104). Post-treatments measurements have occurred at ~5- to 7-year intervals between 1998 and 2016 (data are archived under Study Code TP108).

Study Description Study Site Map Taxonomic Hierarchy Download Study Location Information: (CSV)
Download Full Documentation: (PDF)(EML)
ENTITY TITLES:
1General Plot Characteristics (U-A1) (Jun 1 1998 - Sep 30 2016)METADATADATA
2Transect Bearings, Rebar Distances, Grid Point Conditions, and Associated Notes (U-A2) (Jun 15 1994 - Aug 31 2016)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 - Aug 31 2016)METADATADATA
14Snags (O-B, O-F, and O-F2) (Jun 4 1998 - Aug 31 2016)METADATADATA
15Tree Heights, Post-harvest (O-C) (Sep 9 1999 - Aug 31 2016)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 - Aug 31 2016)METADATADATA
24Natural Regeneration, 2003-2016 (U-F2) (Jun 28 2003 - Aug 31 2016)METADATADATA
25Height and Leader Growth of Tagged Natural Regeneration (U-F3) (Jun 1 2003 - Sep 30 2003)METADATADATA

RELATED MATERIALS:
 DEMO - DEMO website at PNW
 1998 field manual - DEMO sampling protocols for 1998 sampling year
 1999 field manual - DEMO sampling protocols for 1999 sampling year
 2000 field manual - DEMO sampling protocols for 2000 sampling year
 2001 field manual - DEMO sampling protocols for 2001 sampling year
 2003 field manual - DEMO sampling protocols for 2003 sampling year
 2004 field manual - DEMO sampling protocols for 2004 sampling year
 2008 field manual - DEMO sampling protocols for 2008 sampling year
 2009 field manual - DEMO sampling protocols for 2009 sampling year
 2016 field manual - DEMO sampling protocols for 2016 sampling year
 Original field sheet list - Excel file of full listing of scanned DEMO field sheet files in PDF format
 DEMO sampling history - summarizes the history of data collection, by block

RELATED DATABASES:
 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)
 DEMO: Vegetation Data - Pre-Harvest (TP104)
 DEMO: Seedling Data - Post-Harvest (TP124)