A5046621703- Nematode management and characterization studies
- Plant and animal studies
- Animal Behavior and Reproduction
- Cassava research and cyanide
- Aquatic Invertebrate Ecology and Behavior
- Animal Ecology and Behavior Studies
- Entomopathogenic Microorganisms in Pest Control
- Insect and Arachnid Ecology and Behavior
- Parasite Biology and Host Interactions
- Evolution and Genetic Dynamics
- Date Palm Research Studies
- Genetic diversity and population structure
- Legume Nitrogen Fixing Symbiosis
- Fish Ecology and Management Studies
- Insect behavior and control techniques
- Physiological and biochemical adaptations
- Helminth infection and control
- Mycorrhizal Fungi and Plant Interactions
- Parasites and Host Interactions
- Insect symbiosis and bacterial influences
- Ecology and Vegetation Dynamics Studies
- Soil Moisture and Remote Sensing
- Soil and Water Nutrient Dynamics
- Isotope Analysis in Ecology
- Mollusks and Parasites Studies
Université de Montpellier
2008-2024
Institut de Recherche pour le Développement
2014-2024
Agropolis International
2011-2024
Centre National de la Recherche Scientifique
2005-2024
Maladies Infectieuses et Vecteurs: Écologie, Génétique, Évolution et Contrôle
2021-2024
École Pratique des Hautes Études
2015-2023
Centre d'Écologie Fonctionnelle et Évolutive
2015-2023
Centre de Coopération Internationale en Recherche Agronomique pour le Développement
2011-2021
Peuplements végétaux et bioagresseurs en milieu tropical
2016-2021
Plant Health Institute de Montpellier
2021
The outcome of coevolutionary interactions is predicted to vary across landscapes depending on local conditions and levels gene flow, with some populations evolving more extreme specializations than others. Using a globally distributed parasite colonial seabirds, the tick Ixodes uriae , we examined how host availability geographic isolation influences this process. In particular, sampled ticks from 30 six different seabird species, three in Southern Hemisphere Northern Hemisphere. We show...
Sexual selection is a potent evolutionary force that has been shown to vary in strength and direction depending on demographic factors such as density sex ratio. However, the effect of other environmental mode sexual remains largely unexplored. Here, we tested experimentally how food restriction affects potential for male female function simultaneously hermaphroditic freshwater snail Physa acuta. We manipulated availability compared Bateman's metrics between groups five well-fed...
Abstract Neutrality tests in quantitative genetics provide a statistical framework for the detection of selection on polygenic traits wild populations. However, existing method based comparisons divergence at neutral markers and (Qst–Fst) suffers from several limitations that hinder clear interpretation results with typical empirical designs. In this article, we propose multivariate extension neutrality test estimates among-populations (D) within-populations (G) covariance matrices by...
Abstract We investigate the variation in quantitative and molecular traits freshwater snail Galba truncatula, from permanent temporary water habitats. Using a common garden experiment, we measured 20 using seven microsatellites 17 populations belonging to these two estimated trait means each habitat. also distributions of overall genetic ( Q ST ), F within between Overall, observed lack association variance. Among habitats, found > , an indication selection for different optima....
Coevolution in mutualistic symbiosis can yield, because the interacting partners share common interests, to coadaptation: hosts perform better when associated with symbionts of their own locality than others coming from more distant places. However, as two a might also experience conflicts over part life cycle, coadaptation not occur for all life-history traits. We investigated this issue symbiotic systems where nematodes (Steinernema) and bacteria (Xenorhabdus) reproduce insects they have...
Our current understanding on how pathogens evolve relies the hypothesis that pathogens' transmission is traded off against host exploitation. In this study, we surveyed possibility trade-offs determine evolution of bacterial insect pathogen, Xenorhabdus nematophila . This bacterium rapidly kills hosts it infects and transmitted from cadavers to new insects by a nematode vector, Steinernema carpocapsae order detect in biological system, produced 20 lineages using an experimental protocol....
Biological invasions by phylogenetically and ecologically similar competitors pose an evolutionary challenge to native species. Cases of character displacement following suggest that they can respond this shifting their traits. However, the actual impact such shifts on competition are seldom studied. Here, we study between two freshwater snails from Guadeloupe (French Antilles), Aplexa marmorata introduced Physa acuta. The former has responded invasion rapid life-history evolution towards...
In this work, we investigate the investment of entomopathogenic Steinernema nematodes (Rhabditidae) in their symbiotic association with Xenorhabdus bacteria (Enterobacteriaceae). Their life cycle comprises two phases: (1) a free stage soil, where infective juveniles (IJs) nematode carry digestive vesicle and search for insect hosts, (2) parasitic into bacterial multiplication, reproduction, production new IJs occur. Previous studies clearly showed benefits to during stage, but preliminary...
Abstract Unraveling the effect of selection vs. drift on evolution quantitative traits is commonly achieved by one two methods. Either contrasts population differentiation estimates for genetic markers and (the Qst–Fst contrast) or multivariate methods are used to study covariance between sets traits. In particular, many studies have focused variance–covariance matrix G matrix). However, both can cause changes in G. To understand their joint effects, we recently combined into a single test...
Biological invasions offer interesting situations for observing how novel interactions between closely related, formerly allopatric species may trigger phenotypic evolution in situ. Assuming that successful invaders are usually filtered to be competitively dominant, invasive and native follow different trajectories. Natives evolve traits minimize the negative impact of competition, while trait shifts invasives should mostly reflect expansion dynamics, through selection colonization ability...
The snail-trematode host-parasite system has been widely studied, as trematodes are known to greatly influence the fitness of their hosts. Indeed, during development, castrate snail and one possible consequence infection is gigantism snail. Snail usually investigated experimentally by comparing size healthy artificially infected snails. Here, I focused on naturally populations in order investigate if snails submitted trematode pressure have evolved specific life-history traits respond...
The trade-off hypothesis proposes that the evolution of pathogens' virulence is shaped by a link between and contagiousness. This often assumed to come from fact pathogens are contagious only if they can reach high parasitic load in infected host. In this paper we present an experimental test selection on fast replication affect virulence. serial passage experiment, selected 80 lines bacterial insect-pathogen Xenorhabdus nematophila multiply artificial culture medium. resulted shortened lag...
Theoretical work predicts that the magnitude of inbreeding depression is particularly high in traits are closely related to fitness. Despite extensive on male and female reproductive performance, relatively little known how impairs mating behavior. We studied behavior simultaneously hermaphroditic freshwater snail Physa acuta test 1) whether there behavior, 2) potential mate competition choice has an effect strength depression, 3) differs between both sex functions, 4) translates into...
Plant-parasitic nematodes (PPN) are major crop pests. On olive (Olea europaea), they significantly contribute to economic losses in the top-ten producing countries world especially nurseries and under cropping intensification. The diversity structure of PPN communities respond environmental anthropogenic forces. tree is a good host plant model understand impact such forces on since it grows according different modalities (wild, feral cultivated olives). A wide soil survey was conducted...
Ecologists and population geneticists have long suspected that the diversity of living organisms was connected to structure their environment. In heterogeneous environments, diversifying selection combined restricted gene flow may indeed lead locally adapted populations. The freshwater snail, Galba truncatula, is a good model address this question because it present in environment composed temporary permanent waters. order test selective importance those we proposed here measure survival...