NCEAS Project 2540

Inducible defenses and environmental tolerance: A model system for the evolution of phenotypic plastic responses

  • Wilfried Gabriel

ActivityDatesFurther Information
Sabbatical Fellow27th March—1st October 2000Participant List  
Working Group4th—8th April 2001Participant List  

Abstract
Short-term dynamics and the long-term evolution of predator-prey-systems can be strongly influenced by inducible defenses. The objective of this sabbatical proposal is to develop models and theory on inducible defenses using the concepts of environmental tolerance and adaptive phenotypic plasticity. The model should be able to predict plastic responses depending on the biotic and abiotic environmental conditions. The focus will be on reversible inducible defenses, e.g. for Daphnia fast reversible behavior changes in vertical migration, reversible physiological states like alertness, slowly reversible morphological defenses like helmets and neckteeth formation, and only partly reversible life history decisions. These reversible defenses appear simultaneously and in addition to constitutive defenses. The goal is find general conditions for the evolution of reversible plastic responses and to predict the intensity of each induced defense depending on the predation regime and its variability.

TypeProducts of NCEAS Research
Report or White Paper Gabriel, Wilfried. 2000. Annual Report. (Online version)
Report or White Paper Gabriel, Wilfried. 2001. Report on Working Group. (Online version)
Presentations Gabriel, Wilfried. 2002. Evolution of phenotypic plasticity. Conference on Structure and Dynamics of Communities. University of Greifswald.
Presentations Gabriel, Wilfried. 2004. How stress selects for reversible phenotypic plasticity, 22-26 August 2004. European Society for Evolutionary Biology . Sandbjerg, Denmark.
Journal Article Gabriel, Wilfried; Luttbeg, Barney; Sih, Andrew; Tollrian, Ralph. 2005. Environmental tolerance, heterogeneity, and the evolution of reversible plastic responses. American Naturalist. Vol: 166(3). Pages 339-353.
Journal Article Gabriel, Wilfried. 2005. How stress selects for reversible phenotypic plasticity. Journal of Evolutionary Biology. Vol: 18. Pages 873-883.