Skip to Main Content
Madrean pine-oak forest in Arizona: past dynamics, present problemsAuthor(s): Andrew M. Barton
Source: In: Narog, Marcia G., tech. coord. 2008. Proceedings of the 2002 Fire Conference: Managing fire and fuels in the remaining wildlands and open spaces of the Southwestern United States. Gen. Tech. Rep. PSW-GTR-189. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: p. 185-192
Publication Series: General Technical Report (GTR)
PDF: View PDF (348.28 KB)
DescriptionThis paper synthesizes research on presettlement dynamics and modern disruption of Madrean pine-oak forests in Arizona. In response to surface fires characteristic of presettlement times, pines were fire resistant, exhibiting high top-survival, whereas oaks were fire resilient, exhibiting lower top-survival but pronounced resprouting. Thus, low-severity fire favors pines, but resprouting allows oaks to rebound during inter-fire periods. Age structures reveal large increases in stand density, especially for oaks, as a result of modern fire suppression, suggesting more open conditions and higher pine:oak ratio during presettlement times. Stands were, in fact, so open that fire-caused thinning rarely stimulated radial growth. Frequent fires also apparently excluded less fire tolerant species, which have invaded some pine-oak sites. In anomalous stand-replacing crown fires, seedling establishment was very low for pines and oaks, but most oaks resprouted. Pinus leiophylla also resprouted but at low levels, which might nonetheless be an important source of future pines. These results suggest anomalous high severity fires can transform Madrean pine-oak forests into more homogenous oak woodlands. This synthesis argues for urgent restoration using a variety of flexible approaches.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationBarton, Andrew M. 2008. Madrean pine-oak forest in Arizona: past dynamics, present problems. In: Narog, Marcia G., tech. coord. 2008. Proceedings of the 2002 Fire Conference: Managing fire and fuels in the remaining wildlands and open spaces of the Southwestern United States. Gen. Tech. Rep. PSW-GTR-189. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: p. 185-192
- Modeling the effects of fire on the long-term dynamics and restoration of yellow pine and oak forests in the Southern Appalachian Mountains
- Madrean pine-oak forest in Arizona: altered fire regimes, altered communities
- A dendrochronological analysis of a disturbance-succession model for oak-pine forests of the Appalachian Mountains, USA
XML: View XML