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Modelling invasibility in endogenously oscillating tree populations : Timing of invasion matters

In English

Författare

Summary, in English

The timing of introduction of a new species into an ecosystem can be critical in determining the invasibility (i.e. the sensitivity to invasion) of a resident population. Here, we use an individual-based model to test how (1) the type of competition (symmetric versus asymmetric) and (2) seed masting influence the success of invasion by producing oscillatory dynamics in resident tree populations. We focus on a case where two species (one resident, one invader introduced at low density) do not differ in terms of competitive abilities. By varying the time of introduction of the invader, we show that oscillations in the resident population favour invasion, by creating "invasibility windows" during which resource is available for the invader due to transiently depressed resident population density. We discuss this result in the context of current knowledge on forest dynamics and invasions, emphasizing the importance of variability in population dynamics.

Publiceringsår

2009-01

Språk

Engelska

Sidor

219-231

Publikation/Tidskrift/Serie

Biological Invasions

Volym

12

Issue

1

Dokumenttyp

Artikel i tidskrift

Förlag

Springer

Ämne

  • Ecology

Nyckelord

  • Exploitation competition
  • Forest model
  • Individual-based model
  • Invasion criteria
  • Oscillations
  • Species coexistence
  • Stochasticity

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1387-3547