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RESEARCH ARTICLE: Redefining Old-Growth in Forested Wetlands of Western Washington

Published online by Cambridge University Press:  26 June 2009

Luke Painter
Luke Painter*
Affiliation:
Cooke Scientific, Olympia, WA 98502
*
Address correspondence to: Luke Painter, Cooke Scientific, 2040 Aqua Court NW, Olympia, WA 98502; (phone) 360-970-1164; (email) [email protected]
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Abstract

In the Pacific Northwest, state agencies have adopted definitions of mature and old-growth forest, with minimum size and age criteria for the largest trees, as part of a program to protect rare forest habitats. State wetland rating and priority habitat protection guidelines use these criteria to identify mature and old-growth forested wetlands; however, these definitions are based on the characteristics of upland habitats and may not be applicable to wetlands. In this study, data from forested wetlands in western Washington were analyzed to estimate growth rates for five tree species: western red cedar, Sitka spruce, western hemlock, red alder, and shore pine. Estimated average diameter for mature forest is 46 cm (18 inches) and for old-growth 69 cm (27 inches), significantly smaller than the standard size criteria of 53 cm (21 inches) and 81 cm (32 inches), respectively. These results may be more appropriate as size criteria for these forest stages; however, growth rates varied widely between different wetlands and between trees in the same wetland. The great variation in growth rates calls into question the validity of estimating the age of a stand based on the size of trees. Consideration should be given to applying a higher degree of protection to all forested wetlands dominated by coniferous trees, regardless of the size of the trees.

Environmental Practice 11:68–83 (2009)

Type
FEATURES
Information
Environmental Practice , Volume 11 , Issue 2 , June 2009 , pp. 68 - 83
Copyright
Copyright © National Association of Environmental Professionals 2009

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References

Acker, S.A., Franklin, J.F., Greene, S.E., Thomas, T.B., Van Pelt, R., and Bible, K.J.. 2006. Two Decades of Stability and Change in Old-Growth Forest at Mount Rainier National Park. Northwest Science 80(1):65–72.Google Scholar
Burns, R.M., and Honkala, B.H., eds. 1990. Silvics of North America. Agriculture Handbook No. 654. US Department of Agriculture, Forest Service, Washington, DC, 877 pp.Google Scholar
Forest Club, University of British Columbia. 1971. Forestry Handbook for British Columbia, 3rd edition. Forest Club, University of British Columbia, Vancouver, Canada, 815 pp.Google Scholar
Forest Ecosystem Management Assessment Team (FEMAT). 1993. Forest Ecosystem Management: An Ecological, Economic, and Social Assessment. FEMAT, 1366 pp.US Department of Agriculture, Forest Service, Washington, DC.Google Scholar
Franklin, J.F., Cromack, K. Jr., and Denison, W.. 1981. Ecological Characteristics of Old-Growth Douglas-Fir Forests. PNW-GTR-118. US Department of Agriculture, Forest Service, Pacific Northwest Research Station, Portland, OR, 48 pp.CrossRefGoogle Scholar
Franklin, J.F., and Dyrness, C.T.. 1973. Natural Vegetation of Oregon and Washington. GTR-PNW-8. US Department of Agriculture, Forest Service, Pacific Northwest Region, Portland, OR, 417 pp.Google Scholar
Franklin, J.F., and Forman, R.T.T.. 1987. Creating Landscape Patterns by Forest Cutting: Ecological Consequences and Principles. Landscape Ecology 1(1):5–18.CrossRefGoogle Scholar
Franklin, J.F., and Spies, T.A.. 1991a. Ecological Definitions of Old-Growth Douglas-Fir Forests. In Wildlife and Vegetation of Unmanaged Douglas-Fir Forests, Ruggiero, L. F., Aubry, K. B., Carey, A. B. and Huff, M. H., eds. PNW-GTR-285. US Department of Agriculture, Forest Service, Pacific Northwest Research Station, Portland, OR, 61–69.Google Scholar
Franklin, J.F., and Spies, T.A.. 1991b. The Structure of Natural Young, Mature, and Old-Growth Douglas-Fir Forests in Oregon and Washington. In Wildlife and Vegetation of Unmanaged Douglas-Fir Forests, Ruggiero, L. F., Aubry, K. B., Carey, A. B. and Huff, M. H., eds. PNW-GTR-285. US Department of Agriculture, Forest Service, Pacific Northwest Research Station, Portland, OR, 71–92.Google Scholar
Franklin, J.F., Spies, T.A., Pelt, R.V., Riepe, T., Hull, S., and Obermeyer, W.. 2005. Definition and Inventory of Old-Growth Forests on DNR-Managed State Lands. Washington State Department of Natural Resources, Olympia, WA, 21 pp.Google Scholar
Granger, T., Hruby, T., McMillan, A., Peters, D., Rubey, J., Sheldon, D., Stanley, S., and Stockdale, E.. 2005. Wetlands in Washington State. Volume 2: Guidance for Protecting and Managing Wetlands. Ecology Publication 05-06-008. Washington State Department of Ecology, Olympia, WA, 394 pp. Also available at http://www.ecy.wa.gov/programs/sea/wetlands/bas/index.html.Google Scholar
Henderson, J.A., Peter, D.H., Lesher, R.D., and Shaw, D.C.. 1989. Forested Plant Associations of the Olympic National Forest. R6 ECOL Technical Paper 001-88. US Department of Agriculture, Forest Service, Pacific Northwest Region, 502 pp.Google Scholar
Hruby, T. 2004a. Phone conversation concerning the source of the wetland old-growth definition. Personal communication. Senior Ecologist, Washington State Department of Ecology, Olympia, WA, October 25.Google Scholar
Hruby, T. 2004b. Washington State Wetland Rating System for Western Washington—Revised. Ecology Publication 04-06-025. Washington State Department of Ecology, Olympia, WA, 133 pp.Google Scholar
Kunze, L. 1994. Preliminary Classification of Native, Low Elevation, Freshwater Wetland Vegetation in Western Washington. Washington State Department of Natural Resources, Natural Heritage Program, Olympia, WA, 120 pp.Google Scholar
Minore, D., and Smith, C.E.. 1971. Occurrence and Growth of four Northwestern Tree Species Over Shallow Water Tables. PNW-160. US Department of Agriculture, Forest Service, Pacific Northwest Research Station, 9 pp.CrossRefGoogle Scholar
Mitsch, W.J., and Gosselink, J.G.. 2000. Wetlands, 3rd edition. John Wiley and Sons, New York, 600 pp.Google Scholar
Moeur, M., Spies, T.A., Hemstrom, M., Martin, J.R., Alegria, J., Browning, J., Cissel, J., Cohen, W.B., Demeo, T.E., Healey, S., and Warbington, R.. 2005. Northwest Forest Plan–The First 10 Years (1994–2003): Status and Trend of Late-Successional and Old-Growth Forest. PNW-GTR-646. US Department of Agriculture, Forest Service, Pacific Northwest Research Station, Portland, OR, 142 pp.Google Scholar
National Wetlands Working Group. 1988. Wetlands of Canada. Ecological Classification Series, no. 24. Environment Canada Sustainable Development Branch, Montreal, Canada, 452 pp.Google Scholar
Old-Growth Definition Task Group. 1986. Interim Definitions for Old-Growth Douglas-Fir and Mixed-Conifer Forests in the Pacific Northwest. PNW-RN-447. US Department of Agriculture, Forest Service, Pacific Northwest Research Station, Portland, OR, 15 pp.Google Scholar
Painter, L. 2007. Growth Rates and the Definition of Old Growth in the Puget Sound Region (Master of Environmental Studies thesis). Evergreen State College, Olympia, WA, 85 pp. Available at http://archives.evergreen.edu/masterstheses/Accession86-10MES/Painter_L%20MESThesis%202007.pdf.Google Scholar
Tiner, R.W. 1999. Wetland Indicators: A Guide to Wetland Identification, Delineation, Classification, and Mapping. CRC Press LLC, Boca Raton, FL, 392 pp.CrossRefGoogle Scholar
Topik, C., Halverson, N.M., and Brockway, D.G.. 1986. Plant Association and Management Guide for the Western Hemlock Zone. R6-ECOL-230A-1986. US Department of Agriculture, Forest Service, Pacific Northwest Region, Portland, OR, 84 pp.Google Scholar
US Department of Agriculture, Forest Service. 1993. 129 pp.Region 6 Interim Old-Growth Definitions: Douglas-fir Series, Grand Fir/White Fir Series, Interior Douglas-Fir Series, Lodgepole Pine Series, Pacific Silver Fir Series, Ponderosa Pine Series, Port-Orford-Cedar and Tanoak (Redwood) Series, Subalpine Fir Series, and Western Hemlock Series. Timber Management Group, US Department of Agriculture, Forest Service, Pacific Northwest Region, Portland, OR. Also available at http://www.reo.gov/ecoshare/publications/searchresults.asp.Google Scholar
Van Pelt, R. 2007. Identifying Mature and Old Forests in Western Washington. Washington State Department of Natural Resources, Olympia, WA, 104 pp. Also available at http://www.dnr.wa.gov/htdocs/lm/oldgrowth/id_guides/index.html.Google Scholar
Washington State Department of Ecology (WDOE). 1997. Washington State Wetlands Identification and Delineation Manual. Ecology Publication 96-94. WDOE, Olympia, WA, 143 pp.Google Scholar
Washington State Department of Fish and Wildlife (WDFW). 1999. Priority Habitats and Species. WDFW, Olympia, WA, 32 pp. Also available at http://wdfw.wa.gov/hab/phslist.htm.Google Scholar
Washington State Department of Fish and Wildlife (WDFW). 2008. Priority Habitats and Species List. WDFW, Olympia, WA, 174 pp. Also available at http://wdfw.wa.gov/hab/phslist.htm.Google Scholar
Washington State Department of Natural Resources (WDNR). 2001. The Geology of Washington. WDNR, Division of Geology and Earth Resources, Olympia, WA.Google Scholar