Prolonged diapause: a trait increasing invasion speed?

Journal of Theoretical Biology
Tewfik Mahdjoub, Frédéric Menu

Abstract

Invasive species are considered to be the second cause of biodiversity erosion, and one challenge is to determine the life history traits that cause an increased invasion capacity. Prolonged diapause is a major trait in evolution and insect population dynamics, but its effects on invasion speed remain unknown. From a recently developed mathematical approach (integro-difference equations) applied to the insect dormancy, we show that despite a dispersal cost, bet-hedging diapause strategies with low (0.1-0.2) prolonged diapause frequency (emergence after 1 or 2 years) can have a higher invasion speed than a simple diapause strategy (emergence after 1 year) when the environmental stochasticity is sufficiently high. In such conditions, prolonged diapause is a trait supporting invasion capacity by increasing population stochastic growth rate. This conclusion, which applies to a large range of demographic parameters, is in opposition to the usual view that prolonged dormancy is an alternative strategy to dispersal. However, prolonged diapause does not support invasion if the level of environmental stochasticity is low. Therefore, conclusion about its influence on invasion ability needs a good knowledge of environmental stochasticity ...Continue Reading

References

Jan 1, 1992·Journal of Mathematical Biology·M Kot
May 11, 2000·The American Naturalist·Frédéric MenuMuriel Viala
Jan 11, 2001·Journal of Mathematical Biology·M A Lewis, S Pacala
Mar 14, 2001·Trends in Ecology & Evolution·C S. Kolar, D M. Lodge
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Sep 11, 2004·Risk Analysis : an Official Publication of the Society for Risk Analysis·Michael G Neubert, Ingrid M Parker
Oct 7, 2004·Theoretical Population Biology·Mark KotD Brian Walton
Feb 1, 1989·Trends in Ecology & Evolution·T Philippi, J Seger

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Citations

Aug 1, 2008·Evolutionary Applications·Carol Eunmi Lee, Gregory William Gelembiuk
Apr 3, 2014·Ecology Letters·Mathieu Buoro, Stephanie M Carlson
Dec 12, 2020·Journal of Insect Physiology·Alex S TorsonBrent J Sinclair

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