Modeling seed dispersal and forest island dynamics.

W. C. Johnson, D. M. Sharpe, D. L. Deangelis, D. E. Fields, R. J. Olson

Research output: Chapter in Book/Report/Conference proceedingChapter

40 Scopus citations


Evaluates several mathematical models for analysis of dispersal and vegetation dynamics in landscapes of forest islands, considering 2 basic components: 1) the effect of island pattern and matrix quality on amount and quality of exogenous seed dispersed to island ecosystems, and 2) the overall effect of altered seed supply, both in numbers and composition, on ecosystem attributes. The wind dispersal model computes the pattern of seed rain around a seed source based on specific meteorological conditions, seed supply and seed fall velocity. The animal dispersal model traces the movement of individual animals assumed to be carrying seeds from source trees. At each step the animal takes (selected randomly in terms of direction but mediated by the animal's behavioural interactions) there is a certain probability that a seed or seeds will be deposited or buried. Simulations show the rates of invasion of Acer saccharum into a pure stand of Prunus serotina based on 3 levels of seed supply. -P.J.Jarvis after Authors

Original languageEnglish
Title of host publicationForest island dynamics in man-dominated landscapes
EditorsR.L. Burgess, D.M. Sharpe
Number of pages25
StatePublished - Dec 1 1981

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)


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