Influence of landscape structure, topography, and forest type on spatial variation in historical fire regimes, Central Oregon, USA
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In the interior Northwest, debate over restoring mixed-conifer forests after a century of fire exclusion is hampered by poor understanding of the pattern and causes of spatial variation in historical fire regimes.
To identify the roles of topography, landscape structure, and forest type in driving spatial variation in historical fire regimes in mixed-conifer forests of central Oregon.
We used tree rings to reconstruct multicentury fire and forest histories at 105 plots over 10,393 ha. We classified fire regimes into four types and assessed whether they varied with topography, the location of fuel-limited pumice basins that inhibit fire spread, and an updated classification of forest type.
We identified four fire-regime types and six forest types. Although surface fires were frequent and often extensive, severe fires were rare in all four types. Fire regimes varied with some aspects of topography (elevation), but not others (slope or aspect) and with the distribution of pumice basins. Fire regimes did not strictly co-vary with mixed-conifer forest types.
Our work reveals the persistent influence of landscape structure on spatial variation in historical fire regimes and can help inform discussions about appropriate restoration of fire-excluded forests in the interior Northwest. Where the goal is to restore historical fire regimes at landscape scales, managers may want to consider the influence of topoedaphic and vegetation patch types that could affect fire spread and ignition frequency.
KeywordsDendroecology Landscape structure Fire history Fire regimes Eastern Cascades Reference conditions Forest restoration
We thank Meg Krawchuk, Don Falk, Matt Reilly, Emily Comfort, and two anonymous reviews for comments on earlier drafts. This work was facilitated through the Nature Conservancy, Deschutes National Forest, and the Deschutes Collaborative Forest Project. Funding was provided by the Oregon Department of Forestry, the Deschutes National Forest, and the USFS Pacific Northwest Research Station. We thank Pete Caligiuri and Mark Stern for their assistance in coordinating and implementing the project. We thank Pete Powers for his summary of management history in the study area. We thank Calvin Farris for his methodological assistance with mapping historical fires, and Chris Zanger, Keith Olsen, and Ray Davis for help with GIS work. We thank Abby Eurich, Brent Gaither, Kelly Regan, James Johnston, Kayla Johnston, Dawn Pepper, Ben Hart, Lauren Matoszuik, Andrés Holz, Bobby Burdick, and Beatrice Serrano-Martinez for assistance in the field and with dendrochronological work.
- Agee JK (1993) Fire ecology of pacific northwest forests. Island Press, Washington, D.CGoogle Scholar
- Applequist MB (1958) A simple pith locator for use with off-center increment cores. J Forest 56(2):141Google Scholar
- Arno SF, Sneck KM (1977) A method for determining fire history in coniferous forests of the mountain west. U.S. Forest Service General Technical Report GTR-INT-42Google Scholar
- Baker WL (2012) Implications of spatially extensive historical data from surveys for restoring dry forests of Oregon’s eastern Cascades. Ecosphere 3(23):1–39Google Scholar
- Beers TW, Dress PE, Wensel LC (1966) Aspect transformation in site productivity research. J For 64:691–692Google Scholar
- Gara R, Littke W, Agee J, Geiszler D, Stuart J, Driver C (1985) Influence of fires, fungi and mountain pine beetles on development of a lodgepole pine forest in south-central Oregon. In: Baumgartner DM et al (eds) Lodgepole pine: the species and its management Symposium Proceedings. Washington State University, Pullman, pp 153–162Google Scholar
- Geist JM, Cochran PH (1991) Influences of volcanic ash and pumice deposition on productivity of wester interior forest soils. In: Harvey AE, Neuenschwander EH (eds) Proceedings: Management and Productivity of Western-Montane Forest Soils. USDA Forest Service Gen. Tech. Rep, Boise, Idaho. 10–12 April 1990INT-280:82.89Google Scholar
- Hessburg PF, Spies TA, Perry DA, Skinner CN, Taylor AH, Brown PM, Stephens SL, Larson AJ, Churchill DJ, Povak NA, Singleton PH, McComb B, Zielinski WJ, Collins BM, Salter RB, Keane JJ, Franklin JF, Riegel G (2016) Tamm review: management of mixed-severity fire regime forests in Oregon, Washington, and Northern California. For Ecol Manage 366:221–250CrossRefGoogle Scholar
- Heyerdahl EK, Falk DA, Loehman RA (2014a) Data archived with the International Multiproxy Paleofire Database, IGBP PAGES/World Data Center for Paleoclimatology. NOAA/NCDC Paleoclimatology Program, Boulder, Colorado, USA. https://www.ncdc.noaa.gov/paleo-search/study/23655
- Holmes RL (1983) Program COFECHA User’s Manual. Laboratory of Tree-Ring Research, The University of Arizona, TucsonGoogle Scholar
- Howard JL, Aleksoff, KC (2000) Abies grandis. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). http://www.fs.fed.us/database/feis/plants/tree/abigra/all.html Accessed 22 Nov 2016
- Lotan J, Brown J, Neuenschwander L (1985) Role of fire in lodgepole pine forests. In: Baumgartner D et al (eds) Lodgepole pine: the species and its management Symposium Proceedings. Washington State University, Pullman, pp 133–152Google Scholar
- McCune B, Grace JB (2002) Analysis of ecological communities. J Exp Mar Biol Ecol 289(2)Google Scholar
- McCune B, Mefford MJ (2010) PC-ORD. Multivariate Analysis of Ecological Data. Version 6.243 beta. MjM Software, Gleneden Beach, Oregon, USAGoogle Scholar
- Morris MG (1934) Lightning Storms and Fires on the National Forests of Oregon and Washington. USDA Forest Service, Pacific Northwest Experiment Station, Portland, OregonGoogle Scholar
- Perry DA, Jing DA, Youngblood A, Oetter DR (2004) Forest structure and fire susceptibility in volcanic landscapes of the Eastern High Cascades. Oregon. Conservation Biology 18(4):913926Google Scholar
- PRISM Climate Group, Oregon State University. 2016. http://prism.oregonstate.edu
- R Development Core Team (2008) R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. ISBN 3-900051-07-0, URL http://www.R-project.org
- Simpson M (2007) Forested plant associations of the Oregon East Cascades. R6-NR-ECOL-TP-03-2007. USDA Forest Service, Pacific Northwest Region, USAGoogle Scholar
- Stevens JT, Safford HD, North MP, Fried JS, Gray AN, Brown PM, Dolanc CR, Dobrowski SZ, Falk DA, Farris CA, Franklin JF, Fulé PZ, Hagmann RK, Knapp EE, Miller JD, Smith DF, Swetnam TW, Taylor AH (2016) Average stand age from forest inventory plots does not describe historical fire regimes in ponderosa pine and mixed-conifer forests of western North America. PLoS ONE 11(5):e0147688CrossRefPubMedPubMedCentralGoogle Scholar
- Stine P, Hessburg P, Spies T, Kramer M, Fettig CJ, Hansen A, Lehmkuhl J, O’Hara K, Polivka K, Singleton P, Charnley S, Merschel A, White R (2014) The Ecology of Moist Mixed-conifer Forests in Eastern Oregon and Washington: a Synthesis of the Relevant Biophysical Science and Implications for Future Land Management. PNW-GTR-897. USDA Forest Service, Portland, Oregon, USA. p. 254Google Scholar
- Swetnam TW, Wickman BE, Paul HG, Baisan CH (1995) Historical patterns of western spruce budworm and Douglas-fir tussock moth outbreaks in the northern Blue Mountains, Oregon since A.D. 1700. GTR-PNW-484. USDA Forest Service, Portland, Oregon, USAGoogle Scholar
- van Wagtendonk JW (1993) Spatial patterns of lightning strikes and fires in Yosemite National Park. In: Proceedings 12th Conference on Fire and Forest Meteorology, vol 12, pp. 223–231Google Scholar
- Volland AL (1985) Plant associations of the central Oregon pumice zone. R6 Ecol 104-1985. Portland OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Region. 138 pGoogle Scholar