Natural variability in forests of the Grand Canyon, USA

  • Fulé P
  • Covington W
  • Moore M
 et al. 
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Before fire exclusion, all sites had relatively low tree density (140–246 trees ha −1 ) dominated by large trees (basal area 9.1–28.5 m 2 ha −1 ), primarily ponderosa pine or pine/Gambel oak on the South Rim. Currently all sites are relatively dense (389–955 trees ha −1 , ...

Author-supplied keywords

  • Arizona
  • Aspen
  • Fire
  • Forest structure
  • Mixed-conifer
  • Ponderosa pine
  • Reference conditions

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