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TP104

DEMO: Vegetation Data - Pre-Harvest

  • PI: Charles B. Halpern
  • Originator: Charles B. Halpern
  • Other researchers: 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: Dec 7 2015 (Version 5)

    <Citation>      <Acknowledgement>      <Disclaimer>
ABSTRACT:

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)
ENTITY TITLES:
1 Physical and Site Characteristics (U-A1) (Jun 15 1994 - Sep 28 1996) METADATA DATA
2 Transect Bearings and Rebar Placement (U-A2) (Jun 15 1994 - Sep 11 1996) METADATA DATA
3 Percent Overstory Canopy Cover: Moosehorn Densiometer (U-A) (Jun 15 1994 - Sep 11 1996) METADATA DATA
4 Herb Layer Cover and Height, Numbers of Tree Seedlings (U-B) (Jun 15 1994 - Sep 11 1996) METADATA DATA
5 Ground Surface Conditions (U-C) (Jun 15 1994 - Jul 11 1997) METADATA DATA
6 Tall Shrub and Understory Tree Layer: Cover (U-D1) (Jun 15 1994 - Sep 11 1996) METADATA DATA
7 Tall Shrub and Understory Tree Layer: Height (U-D2) (Jun 15 1994 - Sep 11 1996) METADATA DATA
8 Coarse Woody Debris (U-E) (Jun 15 1994 - Sep 11 1996) METADATA DATA
9 Density of Understory Trees (U-F) (Aug 16 1994 - Sep 11 1996) METADATA DATA
10 Pre-Harvest Tree Diameters (O-A) (Jun 15 1994 - Sep 11 1996) METADATA DATA
11 Snag Measurements (O-B) (Jun 2 1994 - Oct 31 1996) METADATA DATA
12 Tree Heights (Jun 5 1995 - Jul 2 1997) METADATA DATA
13 DEMO Grid Point Data (Jun 16 1994 - Jan 10 1997) METADATA DATA
14 Percent Overstory Canopy Cover: Truck Mirrors (U-H) (Apr 3 1997 - Apr 7 1998) METADATA DATA
15 Preharvest Disturbance: Stumps and Skid Rows (U-I) (May 14 1997 - Jul 15 1997) METADATA DATA
16 Preharvest Disturbance: Tree Falls and Tree Breakage (U-J) (Apr 8 1997 - Nov 5 1997) METADATA DATA
17 Epiphytic Lichen Biomass (Jun 5 1995 - Oct 31 1996) METADATA DATA

RELATED MATERIALS:
  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


RELATED DATABASES:
 DEMO: Vegetation Data - Post-Harvest (TP108)