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Spatial Patterns and Distance Distributions in Young Seeded Loblolly Pine Stands

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Spatial patterns were examined for 40 5- to 12-year-old loblolly pine stands of seed origin using point-to-plant distance methods. The stands had been regenerated by seed tree, natural (old field), aerial, or broadcast seeding. Pielou's nonrandomness index indicated that clumping was prevalent in all regeneration methods. Index values were not correlated with age, stand density, or average tree sizes, and differences could not be attributed to regeneration method. Observed distance frequencies were further described by continuous distributions derived from Poisson and negative binomial assumptions of plant distribution used in quadrat (plot) sampling. The Pearson type XI distribution, derived from the negative binomial assumption, fit the observed distances well and should prove useful in spatial modeling. Forest Sci. 24:260-266.

Keywords: Pearson type XI distribution; Pinus taeda; negative binomial distribution; stand models

Document Type: Journal Article

Affiliations: Research Associate, School of Forestry and Wildlife Resources, Virginia Polytechnic Institute and State University, Blacksburg

Publication date: June 1, 1978

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.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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