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A century of fire suppression has altered tree species composition and is a commonly cited cause for the region-wide decline in oak abundance (the fire and oak hypothesis). Other explanations include alterations in canopy gap regimes and deer browsing that operate in conjunction with fire suppression. We examined the interactions among these processes by manipulating fire, deer browsing, and canopy gaps, in a fully factorial design. Fire lowered survival of small canopy trees (10-19.9 cm DBH) but had no effect on large canopy trees (> 20 cm DBH). Fire increased and deer browsing decreased the proportion of top-killed saplings that sprouted. Gaps, however, had no significant effect on sprouting. Deer browsing, after fire, reduced diversity in the sprouting community, created understories dominated by striped maple. Northern red oak saplings were not fire tolerant and did not produce tall sprouts following fire. These results cast doubt on the ubiquitous application of the fire and oak hypothesis to explain the dominance of oak in some mixed hardwood forests.
Cataloging Information
- Acer pensylvanicum
- Acer rubrum
- Acer saccharum
- Betula alleghaniensis
- Betula lenta
- browse
- Carya ovata
- Carya tomentosa
- deciduous forests
- diameter classes
- Fagus grandifolia
- fire injuries (plants)
- fire intensity
- fire management
- fire suppression
- forest management
- Fraxinus americana
- Hamamelis virginiana
- hardwood forests
- Liriodendron tulipifera
- low intensity burns
- Magnolia acuminata
- Magnolia fraseri
- mortality
- Odocoileus virginianus
- Ostrya virginiana
- overstory
- Oxydendrum arboreum
- population ecology
- Prunus serotina
- Quercus prinus
- Quercus rubra
- regeneration
- Robinia pseudoacacia
- seedlings
- species diversity (plants)
- sprouting
- statistical analysis
- suppression
- surface fires
- Tilia americana
- trees
- Tsuga canadensis
- understory vegetation
- West Virginia
- wildlife food habits
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.