Spatial segregation in stage-structured populations with an application to Tribolium

Suzanne L. Robertson, Jim M Cushing

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Spatial segregation among life-cycle stages has been observed in many stage-structured species, including species of the flour beetle Tribolium. We investigate density-dependent dispersal of life-cycle stages as a possible mechanism responsible for this separation. We explore this hypothesis using stage-structured, integrodifference equation (IDE) models that incorporate density-dependent dispersal kernels. We first investigate mechanisms that can lead to spatial patterns in juvenile-adult IDE models. We show, via numerical simulation, that density-dependent dispersal can lead to the spatial segregation of life-cycle stages in the sense that each stage peaks in a different spatial location. We then construct a three-stage spatial model to describe the population dynamics of Tribolium castaneum and Tribolium confusum and assess density-dependent dispersal mechanisms that are able to explain spatial patterns that have been experimentally observed in these species.

Original languageEnglish (US)
Pages (from-to)398-409
Number of pages12
JournalJournal of Biological Dynamics
Volume5
Issue number5
DOIs
StatePublished - Sep 2011

Fingerprint

Tribolium (Coleoptera)
life cycle
developmental stages
Tribolium confusum
Tenebrionidae
Tribolium castaneum
beetle
population dynamics
seeds
simulation

Keywords

  • Density-dependent dispersal
  • Integrodifference equations
  • Population dynamics
  • Segregation of life-cycle stages
  • Spatial patterns

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecology

Cite this

Spatial segregation in stage-structured populations with an application to Tribolium. / Robertson, Suzanne L.; Cushing, Jim M.

In: Journal of Biological Dynamics, Vol. 5, No. 5, 09.2011, p. 398-409.

Research output: Contribution to journalArticle

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