Ecotonal changes and altered tree spatial patterns in lower mixed-conifer forests, Grand Canyon National Park, Arizona, U.S.A.

2004 ◽  
Vol 19 (2) ◽  
pp. 167-180 ◽  
Author(s):  
Joy Nystrom Mast ◽  
Joy J. Wolf
Keyword(s):  
Spatial Patterns ◽  
National Park ◽  
Grand Canyon ◽  
Conifer Forests ◽  
Mixed Conifer ◽  
Grand Canyon National Park ◽  
Mixed Conifer Forests ◽  
Tree Spatial Patterns

The effects of burn entry and burn severity on ponderosa pine and mixed conifer forests in Grand Canyon National Park

2015 ◽  
Vol 24 (4) ◽  
pp. 495 ◽  
Author(s):  
Anna M. Higgins ◽  
Kristen M. Waring ◽  
Andrea E. Thode
Keyword(s):  
Ponderosa Pine ◽  
National Park ◽  
Forest Type ◽  
Grand Canyon ◽  
Burn Severity ◽  
Conifer Forests ◽  
Mixed Conifer ◽  
Grand Canyon National Park ◽  
White Fir ◽  
Mixed Conifer Forests

Over a century of fire exclusion in frequent-fire ponderosa pine and dry mixed conifer forests has resulted in increased tree densities, heavy surface fuel accumulations and an increase in late successional, fire-intolerant trees. Grand Canyon National Park uses prescribed fires and wildfires to reduce fire hazard and restore ecosystem processes. Research is needed to determine post-fire vegetation response thus enabling future forest succession predictions. Our study focussed on the effects of burn entry and burn severity on species composition and regeneration in two forest types: ponderosa pine with white fir encroachment and dry mixed conifer. We found no difference in tree composition and structure in a single, low-severity burn compared with unburned areas in the white fir encroachment forest type. We found no white fir seedlings or saplings in a second-entry, low-severity burn in the white fir encroachment forest type. Second-entry burns were effective in reducing white fir densities in the white fir encroachment forest type. There was significant aspen regeneration following high-severity fire in the dry mixed conifer forest type. This research suggests that repeated entries and an increase in burn severity may be necessary for prescribed fire or wildfire to be effective in meeting management objectives.

Historical spatial patterns and contemporary tree mortality in dry mixed-conifer forests

2016 ◽  
Vol 361 ◽  
pp. 23-37 ◽  
Author(s):  
Kate A. Clyatt ◽  
Justin S. Crotteau ◽  
Michael S. Schaedel ◽  
Haley L. Wiggins ◽  
Harold Kelley ◽  
...  
Keyword(s):  
Spatial Patterns ◽  
Tree Mortality ◽  
Conifer Forests ◽  
Mixed Conifer ◽  
Mixed Conifer Forests

scholarly journals Contrasting Spatial Patterns in Active-Fire and Fire-Suppressed Mediterranean Climate Old-Growth Mixed Conifer Forests

PLoS ONE ◽  
2014 ◽  
Vol 9 (2) ◽  
pp. e88985 ◽  
Author(s):  
Danny L. Fry ◽  
Scott L. Stephens ◽  
Brandon M. Collins ◽  
Malcolm P. North ◽  
Ernesto Franco-Vizcaíno ◽  
...  
Keyword(s):  
Spatial Patterns ◽  
Mediterranean Climate ◽  
Conifer Forests ◽  
Mixed Conifer ◽  
Old Growth ◽  
Active Fire ◽  
Mixed Conifer Forests
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