Is life-history buffering or lability adaptive in stochastic environments? - MNHN - Muséum national d'Histoire naturelle Accéder directement au contenu
Article Dans Une Revue Oikos Année : 2009

Is life-history buffering or lability adaptive in stochastic environments?

Résumé

It is commonly thought that temporal fluctuations in demographic parameters should be selected against because of the deleterious impacts variation can have on fitness. A critical underpinning of this prediction is the assumption that changes in environmental conditions map linearly into changes in demographic parameters over time. We detail why this assumption may often break down and why selection should not always favor buffering of demographic parameters against environmental stochasticity. To the contrary, nonlinear relationships between the environment and demographic performance can produce asymmetric temporal variation in demographic parameters that actually enhances fitness. We extend this result to structured populations using simulation and show that ‘demographic lability’ rather than ‘buffering’ may be adaptive, particularly in organisms with low juvenile or adult survival. Finally, we review previous ecological work, and indicate cases where ‘demographic lability’ may be adaptive, then conclude by identifying research that is needed to develop a theory of life-history evolution that encompasses both demographic buffering and lability.

Dates et versions

mnhn-02282790 , version 1 (10-09-2019)

Identifiants

Citer

David Koons, Samuel Pavard, Annette Baudisch, C. Jessica E. Metcalf. Is life-history buffering or lability adaptive in stochastic environments?. Oikos, 2009, 118 (7), pp.972-980. ⟨10.1111/j.1600-0706.2009.16399.x⟩. ⟨mnhn-02282790⟩

Collections

MNHN
12 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More