Title:

Silvicultural Options Study: plot locations, tree growth, tree regeneration, and understory species abundance

Author(s):

Harrington, Timothy B.

Publication Year:

2022

How to Cite:

These data were collected using funding from the U.S. Government and can be used without additional permissions or fees. If you use these data in a publication, presentation, or other research product please use the following citation:

Harrington, Timothy B. 2022. Silvicultural Options Study: plot locations, tree growth, tree regeneration, and understory species abundance. Fort Collins, CO: Forest Service Research Data Archive. Updated 15 September 2023. https://doi.org/10.2737/RDS-2022-0055

Abstract:

The Silvicultural Options Study (SOS) is a long-term study replicated on three sites (blocks) containing mature second-growth Douglas-fir on the Capitol State Forest, Washington State Department of Natural Resources, near Olympia, Washington. Each site contains six treatment areas that are being managed and regenerated according to standard silvicultural regimes (i.e., clearcut, two-age, patch cutting, group selection, thinning, and non-treated; the latter two regimes represent a deferred final harvest). The six silvicultural regimes were implemented in 1998, 2002, and 2004 at the Blue Ridge, Copper Ridge, and Rusty Ridge sites, respectively, and they include even- and uneven-aged silvicultural regimes assuming a 50-year rotation. The patch and group treatments have a 10-year harvest interval, while the thinning treatment has a 20-year harvest interval. This data publication contains the tree and understory vegetation measurements being taken from a systematic grid of permanent 0.20-acre circular plots, including: (1) tree stem and crown growth (measured December 1996 - May 2019), (2) tree regeneration size and abundance by species and origin (i.e., natural versus planted) (measured January 1997 - November 2009), and (3) visual estimates of cover by dominant understory species (measured December 1997 - November 2009). Initial measurements were taken at 5-year intervals, but later the measurement interval was changed to 10 years. These data are being used to compare forest productivity and stand structure among silvicultural regimes.

Keywords:

environment; biota; farming; Natural Resource Management & Use; Forest management; Ecology, Ecosystems, & Environment; Plant ecology; Wildlife (or Fauna); Habitat management; Pseudotsuga menziesii var. menziesii; silvicultural systems; regeneration harvest; forest productivity; visual aesthetics; tree growth; tree regeneration; understory species cover; latitude/longitude; Washington; Capitol State Forest

Related publications:

• Curtis, Robert O.; Marshall, David D.; DeBell, Dean S. 2004. Silvicultural options for young-growth Douglas-fir forests: the Capitol Forest study—establishment and first results. General Technical Report. PNW-GTR-598. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 110 p. https://doi.org/10.2737/PNW-GTR-598
• Hartley, Damon S.; Han, Han-Sup. 2007. Effects of alternative silvicultural treatments on cable harvesting productivity and cost in western Washington. Western Journal of Applied Forestry. 22(3): 204-212. https://doi.org/10.1093/wjaf/22.3.204
• Harrington, Timothy B.; Peter, David H.; Marshall, David D; DeBell, Dean S. 2022. Ten-year Douglas-fir regeneration and stand productivity differ among contrasting silvicultural regimes in western Washington, USA. Forest Ecology and Management. 510: 120102. https://doi.org/10.1016/j.foreco.2022.120102
• More (6 total)

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