Plant Strategies along Resource Gradients
Document type :
Compte-rendu et recension critique d'ouvrage
DOI :
Title :
Plant Strategies along Resource Gradients
Author(s) :
Koffel, Thomas [Auteur]
Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes [UMR Eco&Sols]
W. K. Kellogg Biological Station [KBS]
Daufresne, Tanguy [Auteur]
Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes [UMR Eco&Sols]
Massol, Francois [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Klausmeier, Christopher [Auteur]
W. K. Kellogg Biological Station [KBS]
Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes [UMR Eco&Sols]
W. K. Kellogg Biological Station [KBS]
Daufresne, Tanguy [Auteur]
Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes [UMR Eco&Sols]
Massol, Francois [Auteur]

Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Klausmeier, Christopher [Auteur]
W. K. Kellogg Biological Station [KBS]
Journal title :
The American Naturalist
Pages :
360 - 378
Publisher :
University of Chicago Press
Publication date :
2018-09
ISSN :
0003-0147
Keyword(s) :
Tolerance
Resource gradient
Adaptive dynamics
Coexistence
Resource gradient
Adaptive dynamics
Coexistence
English keyword(s) :
Herbivory
Resistance
Resistance
HAL domain(s) :
Sciences du Vivant [q-bio]/Génétique/Génétique des populations [q-bio.PE]
English abstract : [en]
Plants present a variety of defensive strategies against herbivores, broadly classified into tolerance and resistance. Since resource availability can also limit plant growth, we expect plant allocation to resource acquisition ...
Show more >Plants present a variety of defensive strategies against herbivores, broadly classified into tolerance and resistance. Since resource availability can also limit plant growth, we expect plant allocation to resource acquisition and defense to vary along resource gradients. Yet, the conditions under which one defensive strategy is favored over the other are unclear. Here, we use an eco-evolutionary model to investigate plant adaptive allocation to resource acquisition, tolerance, and resistance along a resource gradient in a simple food web module inspired by plankton communities where plants compete for a single resource and are grazed on by a shared herbivore. We show that undefended, acquisition-specialist strategies dominate under low resource supplies. Conversely, high resource supplies, which lead to high herbivore abundance because of trophic transfers, result in either the dominance of very resistant strategies or coexistence between a completely resistant strategy and a fast-growing, tolerant one. We also explore the consequences of this adaptive allocation on species biomasses. Finally, we compare our predictions to a more traditional, density-independent optimization model. We show that density dependence mediated by resources and herbivores is the cause of the increase in plant resistance along the resource gradient, as the optimization model would instead have favored tolerance.Show less >
Show more >Plants present a variety of defensive strategies against herbivores, broadly classified into tolerance and resistance. Since resource availability can also limit plant growth, we expect plant allocation to resource acquisition and defense to vary along resource gradients. Yet, the conditions under which one defensive strategy is favored over the other are unclear. Here, we use an eco-evolutionary model to investigate plant adaptive allocation to resource acquisition, tolerance, and resistance along a resource gradient in a simple food web module inspired by plankton communities where plants compete for a single resource and are grazed on by a shared herbivore. We show that undefended, acquisition-specialist strategies dominate under low resource supplies. Conversely, high resource supplies, which lead to high herbivore abundance because of trophic transfers, result in either the dominance of very resistant strategies or coexistence between a completely resistant strategy and a fast-growing, tolerant one. We also explore the consequences of this adaptive allocation on species biomasses. Finally, we compare our predictions to a more traditional, density-independent optimization model. We show that density dependence mediated by resources and herbivores is the cause of the increase in plant resistance along the resource gradient, as the optimization model would instead have favored tolerance.Show less >
Language :
Anglais
Popular science :
Non
ANR Project :
Source :