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Environmental and Historical Factors Affecting Red and White Fir Regeneration in Ecotonal Forests

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Diameter-class distributions of thirty mixed red fir/white fir forests from Yosemite National Park, California, are used to examine patterns of canopy dominance and regeneration modes of these two zonal dominants. Successful regeneration of each species is associated with open canopies and nutrient rich substrates. Red fir regenerates in greater numbers on a wider range of sites, but suffers greater mortality than white fir. Patterns of canopy dominance indicate that white fir tolerates canopy closure and dominates on nutrient-rich sites in montane forests, whereas red fir is less tolerant of shading and dominates on disturbed, nutrient-poor substrates in subalpine forests. These patterns are interpreted as adaptive responses to complex interactions of site factors, disturbance frequency, and biotic constraints along an elevational gradient. Forest Sci. 32:339-347.
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Keywords: Sierra Nevada; TWINSPAN classification; Yosemite National Park; diameter-class distribution

Document Type: Journal Article

Affiliations: Assistant Professor, Department of Geography, University of Georgia, Athens, GA 30602

Publication date: 1986-06-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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