Auteurs, date et publication :
Auteurs Benoît Gauzens , Stéphane Legendre , Xavier Lazzaro , Gérard Lacroix
Publication : Oikos
Date : 2025
Volume : 122
Issue : 11
Pages : 1606-1615
Catégorie(s)
#CNRS #ENS #PLANAQUAAuteurs, date et publication :
Auteurs Bertrand Guenet , Michael Danger , Loïc Harrault , Béatrice Allard , Marta Jauset-Alcala , Gérard Bardoux , Danielle Benest , Luc Abbadie , Gérard Lacroix
Publication : Hydrobiologia
Date : 2025
Volume : 721
Issue : 1
Pages : 35-44
Catégorie(s)
#CNRS #ENS #PLANAQUAAuteurs, date et publication :
Auteurs Michael Danger , Béatrice Allard , Mohamad B. Arnous , Jean-François Carrias , Jacques Mériguet , Loïc Ten-Hage , Gérard Lacroix
Publication : Hydrobiologia
Date : 2025
Volume : 679
Issue : 1
Pages : 251-266
Catégorie(s)
#CNRS #ENS #PLANAQUAAuteurs, date et publication :
Auteurs Eric Edeline , Gérard Lacroix , Christine Delire , Nicolas Poulet , Stéphane Legendre
Publication : Global Change Biology
Date : 2025
Volume : 19
Issue : 10
Pages : 3062-3068
Catégorie(s)
#CNRS #ENS #PLANAQUAAuteurs, date et publication :
Auteurs Alexia Stokes , Sébastien Barot , Jean-Christophe Lata , Gérard Lacroix , Clive G. Jones , William J. Mitsch
Publication : Ecological Engineering
Date : 2025
Volume : 45
Pages : 1-4
Catégorie(s)
#CNRS #Ecotron IleDeFrance #ENS #PLANAQUARésumé
Size-selective mortality due to harvesting is a threat to numerous exploited species, but how it affects the ecosystem remains largely unexplored. Here, we used a pond mesocosm experiment to assess how evolutionary responses to opposite size-selective mortality interacted with the environment (fish density and light intensity used as a proxy of resource availability) to modulate fish populations, prey community composition and ecosystem functions. We used medaka (
Oryzias latipes
) previously selected over 10 generations for small size (harvest-like selection; small-breeder line) or large size (large-breeder line), which displayed slow somatic growth and early maturity or fast somatic growth and late maturity, respectively. Large-breeder medaka produced more juveniles, which seemed to grow faster than small-breeder ones but only under high fish density. Additionally, large-breeder medaka had an increased impact on some benthic prey, suggesting expanded diet breadth and/or enhanced foraging abilities. As a consequence, increased light stimulated benthic algae biomass only in presence of large-breeder medaka, which were presumably better at controlling benthic grazers. Aggregated effect sizes at the community and ecosystem levels revealed that the ecological effects of medaka evolution were of similar magnitude to those induced by the environment and fish introduction. These findings indicate the important environmental dependency of evolutionary response to opposite size-selective mortality on higher levels of biological organizations.
Auteurs, date et publication :
Auteurs Charlotte Evangelista , Julia Dupeu , Joakim Sandkjenn , Beatriz Diaz Pauli , Anders Herland , Jacques Meriguet , Leif Asbjørn Vøllestad , Eric Edeline
Publication : Royal Society Open Science
Date : 2025
Volume : 8
Issue : 10
Pages : 210842
Catégorie(s)
#ANR-Citation #CNRS #ENS #PLANAQUARésumé
Although parasite infection and pollution are common threats facing wild populations, the response of the gut microbiota to the joint impact of these stressors remains largely understudied. Here, we experimentally investigated the effects of exposure to Polycyclic Aromatic Hydrocarbons (PAHs) and infection by a common acanthocephalan intestinal parasite (Pomphorhynchus sp.) on the gut microbial flora of a freshwater fish, the European chub (Squalius cephalus). Naturally infected or uninfected individuals were exposed to PAHs at environmentally realistic concentrations over a five-week period. Characterization of the gut bacterial community through 16S rRNA gene amplicon sequencing revealed that parasitic infection was a more structuring factor of bacterial diversity and composition than PAH exposure. Specifically, chub infected by Pomphorhynchus sp. harbored significantly less evenly represented gut bacterial communities than the uninfected ones. In addition, substantial changes in sequence abundance were observed within the main bacterial phyla, including the Firmicutes, Fusobacteriota, Actinobacteriota, and Proteobacteria. Again, these compositional changes correlated with host infection with Pomphorhynchus sp., confirming its pivotal role in gut microbial assemblage. Overall, these results highlight the importance of defining the parasitic status of individuals when conducting microbial ecotoxicological analyses at the digestive tract level, as this should lead to better understanding of microbiota modulations and help to identify microbial markers specifically associated with chemicals.
Auteurs, date et publication :
Auteurs Yannick Colin , Noëlie Molbert , Thierry Berthe , Simon Agostini , Fabrice Alliot , Beatriz Decencière , Alexis Millot , Aurélie Goutte , Fabienne Petit
Publication : Scientific Reports
Date : 2022
Volume : 12
Issue : 1
Pages : 11084
Catégorie(s)
#CNRS #ENS #PLANAQUAAuteurs, date et publication :
Auteurs L. Jacquin , Q. Mori , V. MéDoc
Publication : Parasitology
Date : 2025
Volume : 140
Issue : 10
Pages : 1310-1315
Catégorie(s)
#CNRS #ENS #PLANAQUAAuteurs, date et publication :
Auteurs Florence D. Hulot , Gérard Lacroix , Michel Loreau
Publication : Oikos
Date : 2025
Volume : 123
Issue : 11
Pages : 1291-1300
Catégorie(s)
#CNRS #ENS #PLANAQUAAuteurs, date et publication :
Auteurs Jean-François Humbert , Kamel Soudani , Gabriel Hmimina , Louise Audebert , Stéphane Buttigieg , Patrice Chatellier , Simon Chollet , Beatriz Decencière , François Derkx , Catherine Freissinet , others
Date : 2025