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Type: Journal Article
Author(s): M. A. White; John L. Vankat
Publication Date: 1993

We examined the composition and structure of forest communities in a 3700 ha watershed in relation to environmental gradients and changes in land management practices. We identified four mixed-conifer forest types dominated by different combinations of Abies concolor, Picea pungens, Pinus ponderosa, Populus tremuloides, and Pseudotsuga menziesii, and a spruce-fir type dominated by Picea engelmannii and Abies lasiocarpa. The forest types occur in a complex pattern related to elevation and topographic- moisture gradients and variations in past fire regimes. However, widespread regeneration of A. concolor following possible changes in the fire regime in the late 19th century and continuing with institution of a fire suppression policy early in the 20th century is producing a more homogenous mixed-conifer forest with greater horizontal and vertical continuity of fuel. This shift toward landscape homogeneity not only may adversely affect biodiversity, but also may be perpetuated as the probability of large, high-severity fires increases with continued fire suppression. ©1993 Kluwer Academic Publishers. Abstract reproduced with kind permission of Kluwer Academic Publishers.

Citation: White, M. A., and J. L. Vankat. 1993. Middle and high elevation coniferous forest communities of the North Rim region of Grand Canyon National Park, Arizona, USA. Vegetatio, v. 109, p. 161-174.

Cataloging Information

Partner Sites:
  • Abies concolor
  • Abies lasiocarpa
  • Abies spp.
  • Arizona
  • community ecology
  • coniferous forests
  • ecosystem dynamics
  • elevation
  • fire exclusion
  • fire regimes
  • fire suppression
  • forest types
  • fragmentation
  • fuel arrangement
  • grazing
  • land management
  • lightning caused fires
  • moisture
  • mosaic
  • national parks
  • Native Americans
  • overstory
  • Picea
  • Picea engelmannii
  • Picea pungens
  • pine forests
  • Pinus ponderosa
  • plant communities
  • plant growth
  • population density
  • Populus
  • Populus tremuloides
  • Pseudotsuga
  • Pseudotsuga menziesii
  • regeneration
  • Sciurus aberti
  • stand characteristics
  • statistical analysis
  • understory vegetation
  • watershed management
  • watersheds
Tall Timbers Record Number: 11052Location Status: In-fileCall Number: Fire FileAbstract Status: Fair use, Okay, Reproduced by permission
Record Last Modified:
Record Maintained By: FRAMES Staff (
FRAMES Record Number: 36653

This bibliographic record was either created or modified by Tall Timbers 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 Tall Timbers.
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.