ENVIRONMENTAL GRADIENTS IN A SIMULATION MODEL OF A BEECH - YELLOW-POPLAR STAND.

Herman H. Shugart, William R. Emanuel, Darrell C. West, Donald L. DeAngelis

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

A simulation model for growth and succession of a hypothetical American-beech - yellow-poplar forest has been developed to study changes in response of this simple community under conditions of a slowly varying climate. As the temperature, through a model parameter equal to the number of growing degree days (GDD), is increased, a sharp discontinuity in response of the model is noted at approximately 4500 GDD. A similar discontinuity is observed at about 4800 GDD as the temperature is slowly decreased. This hysteretic response with width of 300 GDD can be compared for consistency against the rather sharp boundaries which occur between forest communities along smooth environmental gradients. Although many environmental gradients are responsible for transitions in natural systems, the model calculations described indicate that changes in a single environmental variable, temperature, can account for transition zones by affecting competitive ability.

Original languageEnglish
Pages (from-to)163-170
Number of pages8
JournalMathematical Biosciences
Volume50
Issue number3-4
DOIs
StatePublished - Aug 1 1980

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Liriodendron
Fagus
Liriodendron tulipifera
environmental gradient
heat sums
simulation models
Simulation Model
Gradient
Temperature
Discontinuity
simulation
discontinuity
Climate
Fagus grandifolia
temperature
competitive ability
forest communities
Model
transition zone
Growth

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Ecology, Evolution, Behavior and Systematics

Cite this

ENVIRONMENTAL GRADIENTS IN A SIMULATION MODEL OF A BEECH - YELLOW-POPLAR STAND. / Shugart, Herman H.; Emanuel, William R.; West, Darrell C.; DeAngelis, Donald L.

In: Mathematical Biosciences, Vol. 50, No. 3-4, 01.08.1980, p. 163-170.

Research output: Contribution to journalArticle

Shugart, Herman H. ; Emanuel, William R. ; West, Darrell C. ; DeAngelis, Donald L. / ENVIRONMENTAL GRADIENTS IN A SIMULATION MODEL OF A BEECH - YELLOW-POPLAR STAND. In: Mathematical Biosciences. 1980 ; Vol. 50, No. 3-4. pp. 163-170.
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