Menu

DF014

Dendrochronology study of fire history, Blue River watershed, Oregon, 1475 to 1996

  • PI: Frederick J. Swanson
  • Originator: Peter J. Weisberg
  • Other researchers: Sheryl K. Giglia
  • Dates of data preparation: May 1 1996 - Aug 24 1998
  • Data collection status: Study collection is completed and no new collection is planned
  • Data access: Online
  • Last update: May 17 2005 (Version 3)
<Citation>     <Acknowledgement>     <Disclaimer>    
Swanson, F.; Weisberg, P. 2005. Dendrochronology study of fire history, Blue River watershed, Oregon, 1475 to 1996. Long-Term Ecological Research. Forest Science Data Bank, Corvallis, OR. [Database]. Available: http://andlter.forestry.oregonstate.edu/data/abstract.aspx?dbcode=DF014 (12 December 2017) .
Data were provided by the HJ Andrews Experimental Forest research program, funded by the National Science Foundation's Long-Term Ecological Research Program (DEB 1440409), US Forest Service Pacific Northwest Research Station, and Oregon State University.
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 Andrews LTER shall not be liable for damages resulting from any use or misinterpretation of data sets.
ABSTRACT:

Fire history and fire regimes were reconstructed for a 450 square meter area in the central western Cascades using tree-ring analysis of fire scars and tree origin years at 137 sampled clearcuts. Temporal patterns of fire frequency, severity, and size, and interpreted topographic influences on fire frequency are described. Influences of fire history and topography on the development of forest structure are evaluated.

Ninty-four fire episodes were reconstructed for the 521-year period from 1475 to 1996. The average mean fire interval, Weibull median probability interval, and maximum fire interval of 4-ha sites were 97 years, 73 years, and 179 years, respectively. Fire frequency and severity patterns were weakly but significantly associated with spatial variation in hillslope position, slope aspect, slope steepness, and elevation. Fire frequency was lower for higher elevations, lower slope positions, and more mesic slope aspects. Fre severity was lower for higher elevations, lower slope positions, more north-facing slopes, and more gradual slopes. Three fire regime classes are defined and mapped. Study parameters include several variables describing fire scar and tree origin years, reconstructed fire history, fire frequency, fire severity, fire size, forest stand structure.

Study Description Study Site Map Taxonomic Hierarchy Download Study Location Information: (CSV)
Download Full Documentation: (PDF)(EML)
ENTITY TITLES:
1Site location and description METADATADATA
2Plot topography (C sites only) METADATADATA
3Individual tree stump measurements, tree ring counts, and scar counts METADATADATA
4Fire scar information METADATADATA
5Fire scar and pitch ring information used to construct the fire chronology METADATADATA
6Blue River master fire chronology METADATADATA

RELATED DATABASES:
 Fire history dendrochronology study, super old growth data, central western Cascades, Oregon, 2002 (DF020)
 Fire history, fire regimes, and development of forest structure in the central western Oregon Cascades (Weisberg thesis) (DF022)

RELATED PUBLICATIONS:
 Morrison, Peter H., Swanson, Frederick J. 1990, Fire history and pattern in a Cascade Range landscape (Pub. No: 982)
 Weisberg, Peter J. 1998, Fire history, fire regimes, and development of forest structure in the central western Oregon Cascades (Pub. No: 2576)
 Cissel, John H., Swanson, Frederick J., Weisberg, Peter J. 1999, Landscape management using historical fire regimes: Blue River, Oregon (Pub. No: 2502)
 Weisberg, Peter J. 1999, An evaluation of the Blue River Landscape Project: How well does it use historical fire regimes as a model? (Pub. No: 2596)
 Weisberg, Peter J., Swanson, Frederick J. 2001, Fire dating from tree rings in western Cascades Douglas-fir forests: an error analysis (Pub. No: 2646)