Auteurs, date et publication :
Auteurs Antoine Vergne , Vincent Darbot , Corinne Bardot , François Enault , Anne‐Hélène Le Jeune , Jean‐François Carrias , Bruno Corbara , Régis Céréghino , Céline Leroy , Christian Jeanthon
Publication : Journal of Ecology
Date : 2025
Catégorie(s)
#CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs Ari E Martínez , Juan P Gomez
Publication : The American Naturalist
Date : 2025
Volume : 181
Issue : 3
Pages : E53-E59
Catégorie(s)
#CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs Dana L Price , Francois Feer
Publication : Organisms Diversity & Evolution
Date : 2025
Volume : 12
Issue : 3
Pages : 325-331
Catégorie(s)
#CNRS #FORET NouraguesRésumé
In Neotropical rainforest canopies, phytotelmata (‘‘plant-held waters”) shelter diverse aquatic macroinvertebrate communities, including vectors of animal diseases. Studying these communities is difficult because phytotelmata are widely dispersed, hard to find from the ground and often inaccessible. We propose here a method for placing in tree crowns ‘‘artificial phytotelmata” whose size and shape can be tailored to different research targets. The efficacy of this method was shown while comparing the patterns of community diversity of three forest formations. We noted a difference between a riparian forest and a rainforest, whereas trees alongside a dirt road cutting through that rainforest corresponded to a subset of the latter. Because rarefied species richness was significantly lower when the phytotelmata were left for three weeks rather than for six or nine weeks, we recommend leaving the phytotelmata for twelve weeks to permit predators and phoretic species to fully establish themselves.
Auteurs, date et publication :
Auteurs Alain Dejean , Frédéric Petitclerc , Frédéric Azémar , Laurent Pélozuelo , Stanislas Talaga , Maurice Leponce , Arthur Compin
Publication : Comptes Rendus Biologies
Date : 2025
Volume : 341
Pages : 20–27
Catégorie(s)
#CIRAD #CNRS #FORET Nouragues #FORET ParacouAuteurs, date et publication :
Auteurs Francis Q Brearley , David R Elliott , Amaia Iribar , Robin Sen
Publication : Plant and soil
Date : 2025
Volume : 403
Issue : 1-2
Pages : 253-265
Catégorie(s)
#ANR-Citation #CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs Olivier Brouard , Anne-Hélène Le Jeune , Céline Leroy , Régis Cereghino , Olivier Roux , Laurent Pelozuelo , Alain Dejean , Bruno Corbara , Jean-François Carrias
Publication : PloS one
Date : 2025
Volume : 6
Issue : 5
Pages : e20129
Catégorie(s)
#CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs Isabelle Boulangeat , Damien Georges , Cédric Dentant , Richard Bonet , Jérémie Van Es , Sylvain Abdulhak , Niklaus E. Zimmermann , Wilfried Thuiller
Publication : Ecography
Date : 2025
Volume : 37
Issue : 12
Pages : 1230-1239
Catégorie(s)
#CNRS #Lautaret #UGARésumé
This study presents the occurrence and abundance of Aeromonas antibiotic-resistant bacteria (ARB) and genes (ARGs) isolated from water, biofilm and fish in two commercial trout farms before and one week after flumequine treatment. Wild (WT) and non-wild (NWT) strains were determined for quinolones (flumequine, oxolinic acid and enrofloxacin), oxytetracycline (OXY), florfenicol (FFN), trimethoprim-sulfamethoxazole (TMP) and colistin (COL), and pMAR (presumptive multi-resistant) strains were classified. Forty-four ARGs for the mentioned antibiotics, β-lactams and multi-resistance were quantified for 211 isolates. BlaSHV-01, mexF and tetE were the dominant ARGs. A greater occurrence and abundance of tetA2, sul3, floR1, blaSHV-01 and mexF were observed for NWT compared to WT. The occurrence of pMAR and NWT Aeromonas for quinolones, OXY, FFN, TMP, COL and ARGs depended on the Aeromonas origin, antibiotic use and the presence of upstream activities. Our results revealed the impact of a flumequine treatment on Aeromonas present on a fish farm through an increase in NWT and pMAR strains. The link between fish and their environment was shown by the detection of identical ARB and ARGs in the two types of samples. There appears to be a high risk of resistance genes developing and spreading in aquatic environments.
Auteurs, date et publication :
Auteurs Niki Hayatgheib , Ségolène Calvez , Catherine Fournel , Lionel Pineau , Hervé Pouliquen , Emmanuelle Moreau
Publication : Microorganisms
Date : 2021
Volume : 9
Issue : 6
Pages : 1201
Catégorie(s)
#CNRS #EcoGenO #Université de RennesRésumé
DNA-based snapshots of ancient vegetation have shown that the composition of high-latitude plant communities changed considerably during the late Quaternary. However, parallel changes in biotic interactions remain largely uninvestigated. Here we show how mutualisms involving plants and heterotrophic organisms varied during the last 50,000 years. During 50–25 ka BP, a cool period featuring stadial-interstadial fluctuations, arbuscular mycorrhizal and non-N-fixing plants predominated. During 25-15 ka BP, a cold, dry interval, the representation of ectomycorrhizal, non-mycorrhizal and facultatively mycorrhizal plants increased, while that of N-fixing plants decreased further. From 15 ka BP, which marks the transition to and establishment of the Holocene interglaciation, representation of arbuscular mycorrhizal plants decreased further, while that of ectomycorrhizal, non-mycorrhizal, N-fixing and wind-pollinated plants increased. These changes in the mutualist trait structure of vegetation may reflect responses to historical environmental conditions that are without current analogue, or biogeographic processes, such as spatial decoupling of mutualist partners.
Auteurs, date et publication :
Auteurs Martin Zobel , John Davison , Mary E Edwards , Christian Brochmann , Eric Coissac , Pierre Taberlet , Eske Willerslev , Mari Moora
Publication : Nature Communications
Date : 2025
Volume : 9
Issue : 1
Pages : 139
Catégorie(s)
#CNRS #eDNARésumé
Territorial behaviour has been widely described across many animal taxa, where the acquisition and defence of a territory are critical for the fitness of an individual. Extensive evidence suggests that androgens (e.g. testosterone) are involved in the modulation of territorial behaviour in male vertebrates. Short-term increase of androgen following a territorial encounter appears to favour the outcome of a challenge. The “Challenge Hypothesis” proposed by Wingfield and colleagues outlines the existence of a positive feedback relationship between androgen and social challenges (e.g. territorial intrusions) in male vertebrates. Here we tested the challenge hypothesis in the highly territorial poison frog, Allobates femoralis, in its natural habitat by exposing males to simulated territorial intrusions in form of acoustic playbacks. We quantified repeatedly androgen concentrations of individual males via a non-invasive water-borne sampling approach. Our results show that A. femoralis males exhibited a positive behavioural and androgenic response after being confronted to simulated territorial intrusions, providing support for the Challenge Hypothesis in a territorial frog.Competing Interest StatementThe authors have declared no competing interest.
Auteurs, date et publication :
Auteurs Camilo Rodríguez , Leonida Fusani , Gaëlle Raboisson , Walter Hödl , Eva Ringler , Virginie Canoine
Publication : bioRxiv
Date : 2020
Pages : 2020.11.15.383364