Dispersal plasticity driven by variation in fitness across species and environmental gradients - Archive ouverte HAL Access content directly
Journal Articles Ecology Letters Year : 2022

Dispersal plasticity driven by variation in fitness across species and environmental gradients

(1) , (2) , (1, 3) , (1) , (1) , (1)
1
2
3

Abstract

Dispersal plasticity, when organisms adjust their dispersal decisions depending on their environment, can play a major role in ecological and evolutionary dynamics, but how it relates to fitness remains scarcely explored. Theory predicts that high dispersal plasticity should evolve when environmental gradients have a strong impact on fitness. Using microcosms, we tested in five species of the genus Tetrahymena whether dispersal plasticity relates to differences in fitness sensitivity along three environmental gradients. Dispersal plasticity was species-and environment-dependent. As expected, dispersal plasticity was generally related to fitness sensitivity, with higher dispersal plasticity when fitness is more affected by environmental gradients. Individuals often preferentially disperse out of low fitness environments, but leaving environments that should yield high fitness was also commonly observed. We provide empirical support for a fundamental, but largely untested, assumption in dispersal theory: the extent of dispersal plasticity correlates with fitness sensitivity to the environment.
Fichier principal
Vignette du fichier
Campana et al. 2022. EcolLett.pdf (700.42 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03822123 , version 1 (20-10-2022)

Licence

Attribution - NonCommercial - NoDerivatives - CC BY 4.0

Identifiers

Cite

Julie L M Campana, Allan Raffard, Alexis S Chaine, Michèle Huet, Delphine Legrand, et al.. Dispersal plasticity driven by variation in fitness across species and environmental gradients. Ecology Letters, 2022, 25 (11), pp.2410-2421. ⟨10.1111/ele.14101⟩. ⟨hal-03822123⟩
19 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More