Effects of landscape patterns of fire severity on regenerating ponderosa pine forests (Pinus ponderosa) in New Mexico and Arizona, USA
Document Type: Journal Article
Author(s): Sandra L. Haire; Kevin McGarigal
Publication Year: 2010

Cataloging Information

  • age classes
  • Arizona
  • burn severity
  • catastrophic fires
  • coniferous forests
  • disturbance
  • ecological restoration
  • fire frequency
  • fire injury
  • fire intensity
  • fire management
  • fire regimes
  • forest age structure
  • forest management
  • forest recovery
  • generalized linear models
  • landscape ecology
  • mortality
  • New Mexico
  • photography
  • pine
  • pine forests
  • Pinus
  • Pinus ponderosa
  • ponderosa pine
  • post-fire recovery
  • regeneration
  • seed dispersal
  • seed dispersal kernel
  • spatial heterogeneity
  • spatial scale
  • trees
  • wildfires
Partner Site(s):
  • Southwest FireCLIME
Record Maintained By:
Record Last Modified: February 29, 2020
FRAMES Record Number: 9537
Tall Timbers Record Number: 25236
TTRS Location Status: Not in file
TTRS Call Number: Not in File
TTRS Abstract Status: Fair use, Okay, Reproduced by permission

This bibliographic record was either created or modified by the Tall Timbers Research Station and Land Conservancy and is provided without charge to promote research and education in Fire Ecology. The E.V. Komarek Fire Ecology Database is the intellectual property of the Tall Timbers Research Station and Land Conservancy.

Annotated Bibliography

This document is part of the Southwest FireCLIME Annotated Bibliography, which includes published research related to the interactions between climate change, wildfire, and subsequent ecosystem effects in the southwestern U.S. The publications contained in the Bibliography have each been summarized to distill the outcomes as they pertain to fire and climate. Go to this document's record in the Southwest FireCLIME Annotated Bibliography.


Much of the current effort to restore southwestern ponderosa pine forests to historical conditions is predicated upon assumptions regarding the catastrophic effects of large fires that are now defining a new fire regime. To determine how spatial characteristics influence the process of ponderosa pine regeneration under this new regime, we mapped the spatial patterns of severity at areas that burned in 1960 (Saddle Mountain, AZ) and (La Mesa, NM) 1977 using pre- and post-fire aerial photography, and quantified characteristics of pine regeneration at sample plots in areas where all trees were killed by the fire event. We used generalized linear models to determine the relationship of ponderosa pine stem density to three spatial burn pattern metrics: (1) distance to nearest edge of lower severity; (2) neighborhood severity, measured at varying spatial scales, and (3) scaled seed dispersal kernel surfaces. Pine regeneration corresponded most closely with particular scales of measurement in both seed dispersal kernel and neighborhood severity. Spatial patterns of burning remained important to understanding regeneration even after consideration of subsequent disturbance and other environmental variables, with the exception of a few cases in which simpler models were equally well-supported by the data. Analysis of tree ages revealed slow progress in early post-fire years. Our observations suggest that populations spread in a moving front, as well as by remotely dispersed individuals. Based on our results, recent large fires cannot be summarily dismissed as catastrophic. We conclude that management should focus on the value and natural recovery of post-fire landscapes. Further, process centered restoration efforts could utilize our findings in formulating reference dynamics under a changing fire regime.

Online Link(s):
Haire, Sandra L.; McGarigal, Kevin. 2010. Effects of landscape patterns of fire severity on regenerating ponderosa pine forests (Pinus ponderosa) in New Mexico and Arizona, USA. Landscape Ecology 25(7):1055-1069.