Auteurs, date et publication :
Auteurs Elvire Bestion , Julien Cote , Staffan Jacob , Laurane Winandy , Delphine Legrand
Publication : Current Opinion in Insect Science
Date : 2025
Volume : 35
Pages : 117-122
Catégorie(s)
#CNRS #Metatron terrestreAuteurs, date et publication :
Auteurs Delphine Legrand , Nicolas Larranaga , Romain Bertrand , Simon Ducatez , Olivier Calvez , Virginie M. Stevens , Michel Baguette
Publication : Proceedings of the Royal Society B: Biological Sciences
Date : 2016
Volume : 283
Issue : 1839
Pages : 20161533
Catégorie(s)
#CNRS #Metatron terrestreRésumé
Dispersal, defined as any movements potentially leading to gene flow, is a major process driving a species’ capacity to cope with human-induced environmental modifications. However, the dispersal process is multi-causal, which currently hinders predictions regarding a species’ resilience to global change. We used a multifaceted approach to disentangle the relative importance of a suite of dispersal-related factors in the butterfly Lycaena tityrus, including condition- (morphology and behavior) and context- (environmental) dependent factors. Experiments were conducted at an experimental platform dedicated to study dispersal, the Metatron, to record emigration propensity in two-patch experimental metapopulations under different environmental conditions. The butterflies’ individual condition was subsequently assessed in the laboratory. Individual condition did not generally influence emigration propensity. We detected a significant sex bias in emigration propensity, being generally higher in females than in males, but in a context-dependent manner. The environmental context affected emigration propensity, which was higher when habitat quality was poor. Our results show that emigration is not random in L. tityrus, but is rather an active process triggered by sex and habitat quality. Our main finding was that individual condition, and particularly flight ability measured by a performance test, was not related to emigration propensity in experimental metapopulations. Our results may have important implications for forecasting future species distributions, as deteriorating environmental contexts are likely to increase emigration whatever the individual condition is.
Auteurs, date et publication :
Auteurs Elisabeth Reim , Michel Baguette , Franziska Günter , Klaus Fischer
Publication : Ecosphere
Date : 2025
Volume : 9
Issue : 11
Pages : e02502
Catégorie(s)
#CNRS #Metatron terrestreRésumé
Dispersal is a central biological process tightly integrated into life-histories, morphology, physiology and behaviour. Such associations, or syndromes, are anticipated to impact the eco-evolutionary dynamics of spatially structured populations, and cascade into ecosystem processes. As for dispersal on its own, these syndromes are likely neither fixed nor random, but conditional on the experienced environment. We experimentally studied how dispersal propensity varies with individuals' phenotype and local environmental harshness using 15 species ranging from protists to vertebrates. We reveal a general phenotypic dispersal syndrome across studied species, with dispersers being larger, more active and having a marked locomotion-oriented morphology and a strengthening of the link between dispersal and some phenotypic traits with environmental harshness. Our proof-of-concept metacommunity model further reveals cascading effects of context-dependent syndromes on the local and regional organisation of functional diversity. Our study opens new avenues to advance our understanding of the functioning of spatially structured populations, communities and ecosystems.
Auteurs, date et publication :
Auteurs Julien Cote , Maxime Dahirel , Nicolas Schtickzelle , Florian Altermatt , Armelle Ansart , Simon Blanchet , Alexis S. Chaine , Frederik De Laender , Jonathan De Raedt , Bart Haegeman , Staffan Jacob , Oliver Kaltz , Estelle Laurent , Chelsea J. Little , Luc Madec , Florent Manzi , Stefano Masier , Felix Pellerin , Frank Pennekamp , Lieven Therry
Publication : Ecology Letters
Date : 2025
Volume : 25
Issue : 12
Pages : 2675-2687
Catégorie(s)
#ANR-Citation #CNRS #Metatron terrestreRésumé
Range shift, a widespread response to climate change, will depend on species abilities to withstand warmer climates. However, these abilities may vary within species and such intraspecific variation can strongly impact species responses to climate change. Facing warmer climates, individuals should disperse according to their thermal optimum with consequences for species range shifts. Here, we studied individual dispersal of a reptile in response to climate warming and preferred temperature using a semi-natural warming experiment. Individuals with low preferred temperatures dispersed more from warmer semi-natural habitats, whereas individuals with higher preferred temperatures dispersed more from cooler habitats. These dispersal decisions partly matched phenotype-dependent survival rates in the different thermal habitats, suggesting adaptive dispersal decisions. This process should result into a spatial segregation of thermal phenotypes along species moving ranges which should facilitate local adaptation to warming climates. We therefore call for range shift models including intraspecific variation in thermal phenotype and dispersal decision.
Auteurs, date et publication :
Auteurs Elvire Bestion , Jean Clobert , Julien Cote
Publication : Ecology Letters
Date : 2025
Volume : 18
Issue : 11
Pages : 1226-1233
Catégorie(s)
#CNRS #Metatron terrestreRésumé
Contemporary climate change affects population dynamics, but its influence varies with landscape structure. It is still unclear whether landscape fragmentation buffers or amplifies the effects of climate on population size and the age and body size of individuals composing these populations. This study aims to investigate the impacts of warm climates on lizard life-history traits and population dynamics in habitats that vary in their connectivity. We monitored common lizard Zootoca vivipara populations for 3 years in an experimental system in which both climatic conditions and connectivity among habitats were simultaneously manipulated. We considered two climatic treatments (i.e. present-day climate and warm climate [+1.4°C than present-day climate]) and two connectivity treatments (i.e. a connected treatment in which individuals could move from one climate to the other and an isolated treatment in which movement between climates was not possible). We monitored survival, reproduction, growth, dispersal, age and body size of each individual in the system as well as population density through time. We found that the influence of warm climates on life-history traits and population dynamics depended on connectivity among thermal habitats. Populations in warm climates were (i) composed of younger individuals only when isolated; (ii) larger in population size only in connected habitats and (iii) composed of larger age-specific individuals independently of the landscape configuration. The connectivity among habitats altered population responses to climate warming likely through asymmetries in the flow and phenotype of dispersers between thermal habitats. Our results demonstrate that landscape fragmentation can drastically change the dynamics and persistence of populations facing climate change.
Auteurs, date et publication :
Auteurs Félix Pellerin , Elvire Bestion , Laurane Winandy , Lucie Di Gesu , Murielle Richard , Robin Aguilée , Julien Cote
Publication : Journal of Animal Ecology
Date : 2025
Volume : 91
Issue : 11
Pages : 2301-2313
Catégorie(s)
#ANR-Citation #CNRS #Metatron terrestreAuteurs, date et publication :
Auteurs Elvire Bestion , Staffan Jacob , Lucie Zinger , Lucie Di Gesu , Murielle Richard , Joël White , Julien Cote
Publication : Nature Ecology & Evolution
Date : 2017
Volume : 1
Issue : 6
Pages : 0161
Catégorie(s)
#CNRS #Metatron terrestreAuteurs, date et publication :
Auteurs Emanuel A Fronhofer , Delphine Legrand , Florian Altermatt , Armelle Ansart , Simon Blanchet , Dries Bonte , Alexis Chaine , Maxime Dahirel , Frederik De , Jonathan De Raedt , Lucie di Gesu , Staffan Jacob , Oliver Kaltz , Chelsea J Little , Luc Madec , Florent Manzi , Stefano Masier , Frank Pennekamp , Nicolas Schtickzelle , Lieven Therry
Publication : Nature Ecology and Evolution
Date : 2025
Volume : 2
Pages : 1859-1863
Catégorie(s)
#CNRS #Metatron terrestreRésumé
Species interactions are central in predicting the impairment of biodiversity with climate change. Trophic interactions may be altered through climate-dependent changes in either predator food preferences or prey communities. Yet, climate change impacts on predator diet remain surprisingly poorly understood. We experimentally studied the consequences of 2°C warmer climatic conditions on the trophic niche of a generalist lizard predator. We used a system of semi-natural mesocosms housing a variety of invertebrate species and in which climatic conditions were manipulated. Lizards in warmer climatic conditions ate at a greater predatory to phytophagous invertebrate ratio and had smaller individual dietary breadths. These shifts mainly arose from direct impacts of climate on lizard diets rather than from changes in prey communities. Dietary changes were associated with negative changes in fitness-related traits (body condition, gut microbiota) and survival. We demonstrate that climate change alters trophic interactions through top-predator dietary shifts, which might disrupt eco-evolutionary dynamics.
Auteurs, date et publication :
Auteurs Elvire Bestion , Andrea Soriano-Redondo , Julien Cucherousset , Staffan Jacob , Joël White , Lucie Zinger , Lisa Fourtune , Lucie Di Gesu , Aimeric Teyssier , Julien Cote
Publication : Proceedings of the Royal Society B: Biological Sciences
Date : 2019
Volume : 286
Issue : 1914
Pages : 20192227
Catégorie(s)
#CNRS #Metatron terrestreRésumé
Maternal effects can give newborns a head start in life by adjusting natal phenotypes to natal environments, yet their strength and adaptiveness are often difficult to investigate in natural populations. Here, we studied anticipatory maternal effects and their adaptiveness in common lizards in a seminatural experimental system. Specifically, we investigated how maternal environments (i.e., vegetation cover) and maternal phenotype (i.e., activity levels and body length) can shape offspring phenotype. We further studied whether such maternal effects influenced offspring survival in natal environments varying with respect to vegetation cover, conspecific density, and, consequently, maternal fitness. More active females from dense vegetation habitats produced bigger offspring than their less active counterparts, the contrary being true for sparse vegetation habitats. Moreover, females from dense vegetation habitats produced more active offspring and more active offspring survived better in dense vegetation habitats, resulting in greater maternal fitness through maternal effects. These results suggest adaptive anticipatory maternal effects, induced by vegetation structure and mediated by activity levels that may shape early-life prospects in natal environments.
Auteurs, date et publication :
Auteurs Elvire Bestion , Aimeric Teyssier , Marylin Rangassamy , Olivier Calvez , Olivier Guillaume , Murielle Richard , Amandine Braem , Felix Zajitschek , Susanne Zajitschek , Julien Cote
Publication : The American Naturalist
Date : 2022
Volume : 200
Issue : 6
Pages : 773-789