Auteurs, date et publication :
Auteurs Beth Byles , François Catzeflis , R Philip Scheibel , F Agustín Jiménez
Publication : Comparative Parasitology
Date : 2025
Volume : 80
Issue : 2
Pages : 210-216
Catégorie(s)
#CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs CE Paine , Christopher Baraloto , Jérôme Chave , Bruno Hérault
Publication : Oikos
Date : 2025
Volume : 120
Issue : 5
Pages : 720-727
Catégorie(s)
#CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs Ari E Martínez , Juan P Gomez , José Miguel Ponciano , Scott K Robinson
Publication : The American Naturalist
Date : 2025
Volume : 187
Issue : 5
Pages : 607-619
Catégorie(s)
#CNRS #FORET NouraguesRésumé
In Amazonia, the knowledge about Fungi remains patchy and biased towards accessible sites. This is particularly the case in French Guiana where the existing collections have been confined to few coastal localities. Here, we aimed at filling the gaps of knowledge in undersampled areas of this region, particularly focusing on the Basidiomycota. From 2011, we comprehensively collected fruiting-bodies with a stratified and reproducible sampling scheme in 126 plots. Sites of sampling reflected the main forest habitats of French Guiana in terms of soil fertility and topography. The dataset of 5219 specimens gathers 245 genera belonging to 75 families, 642 specimens are barcoded. The dataset is not a checklist as only 27% of the specimens are identified at the species level but 96% are identified at the genus level. We found an extraordinary diversity distributed across forest habitats. The dataset is an unprecedented and original collection of Basidiomycota for the region, making specimens available for taxonomists and ecologists. The database is publicly available in the GBIF repository (https://doi.org/10.15468/ymvlrp).
Auteurs, date et publication :
Auteurs Gaëlle Jaouen , Audrey Sagne , Bart Buyck , Cony Decock , Eliane Louisanna , Sophie Manzi , Christopher Baraloto , Mélanie Roy , Heidy Schimann
Publication : Scientific Data
Date : 2019
Volume : 6
Issue : 1
Pages : 206
Catégorie(s)
#CIRAD #CNRS #FORET Nouragues #FORET ParacouAuteurs, date et publication :
Auteurs Vincent Médoc , Hélène Albert , Thierry Spataro
Publication : Biological Invasions
Date : 2025
Volume : 17
Issue : 12
Pages : 3625-3637
Catégorie(s)
#CNRS #ENS #PLANAQUARésumé
Functional trait differences among species are increasingly used to infer the effects of biotic and abiotic processes on species coexistence. Commonly, the trait diversity observed within communities is compared to patterns simulated in randomly generated communities based on sampling within a region. The resulting patterns of trait convergence and divergence are assumed to reveal abiotic and biotic processes, respectively. However, biotic processes such as competition can produce both trait divergence and convergence, through either excluding similar species (niche differences, divergence) or excluding dissimilar species (weaker competitor exclusion, convergence). Hence, separating biotic and abiotic processes that can produce identical patterns of trait diversity, or even patterns that neutralize each other, is not feasible with previous methods. We propose an operational framework in which the functional trait dissimilarity within communities (FDcomm) is compared to the corresponding trait dissimilarity expected from the species pool (i.e., functional species pool diversity, FDpool). FDpool includes the set of potential species for a site delimited by the operating environmental and dispersal limitation filters. By applying these filters, the resulting pattern of trait diversity is consistent with biotic processes, i.e., trait divergence (FDcomm . FDpool) indicates niche differentiation, while trait convergence (FDcomm , FDpool) indicates weaker competitor exclusion. To illustrate this framework, with its potential application and constraints, we analyzed both simulated and field data. The functional species pool framework more consistently detected the simulated trait diversity patterns than previous approaches. In the field, using data from plant communities of typical Northern European habitats in Estonia, we found that both niche-based and weaker competitor exclusion influenced community assembly, depending on the traits and community considered. In both simulated and field data, we demonstrated that only by estimating the species pool of a site is it possible to differentiate the patterns of trait dissimilarity produced by operating biotic processes. The framework, which can be applied with both functional and phylogenetic diversity, enables a reinterpretation of community assembly processes. Solving the challenge of defining an appropriate reference species pool for a site can provide a better understanding of community assembly.
Auteurs, date et publication :
Auteurs Francesco de Bello , Jodi N. Price , Tamara Münkemüller , Jaan Liira , Martin Zobel , Wilfried Thuiller , Pille Gerhold , Lars Götzenberger , Sébastien Lavergne , Jan Lepš , Kristjan Zobel , Meelis Pärtel
Publication : Ecology
Date : 2025
Volume : 93
Issue : 10
Pages : 2263-2273
Catégorie(s)
#CNRS #Lautaret #UGAAuteurs, date et publication :
Auteurs Christiane Roscher , Stefan Karlowsky , Alexandru Milcu , Arthur Gessler , Annette Jesch , Markus Lange , Perla Mellado-va , Tanja Strecker , Damien Landais , Olivier Ravel , Nina Buchmann , Jacques Roy , Gerd Gleixner Id
Publication : PloS one
Date : 2025
Volume : 14
Issue : 1
Pages : e0204715
Catégorie(s)
#ANR-Citation #CNRS #Ecotron de MontpellierRésumé
The role of biodiversity for soil processes remains poorly understood. Existing evidence suggests that functional diversity rather than species richness is relevant for soil functioning. However, the importance of functional diversity has rarely been assessed simultaneously at more than one trophic level, critically limiting the prediction of consequences of biodiversity loss for soil functioning. In a laboratory microcosm experiment, we tested the hypothesis that increasing functional dissimilarity of both litter-feeding soil fauna and litter mixtures interactively affects the rates of five different soil processes related to litter decomposition. We created trait-based functional dissimilarity gradients using five assemblages of two detritivore species and five mixtures of two plant litter species commonly found in Mediterranean shrubland ecosystems of southern France. With increasing drought periods predicted for Mediterranean ecosystems in the future, we additionally included two different watering frequencies to evaluate the impact of drought on soil processes and how drought interacts with functional dissimilarity. The different fauna assemblages and litter mixtures showed strong effects on litter mass loss, soil organic carbon and nitrogen leaching, as well as on soil microbial activities. Up to 20% of the variation in response variables was explained by functional dissimilarity, suggesting an ecologically relevant impact of functional diversity on soil process rates. Detritivore functional dissimilarity tended to have stronger effects when combined with increasingly dissimilar litter mixtures, suggesting that trait dissimilarity interacts across trophic levels. Drought affected several soil processes but did not modify the relationships between functional dissimilarity and process rates. Our results indicate that trait diversity of detritivore assemblages and litter mixtures is an important predictor of soil process rates. The common and easily measurable traits used in our study suggest straightforward application across different types of ecosystems and environmental conditions.
Auteurs, date et publication :
Auteurs M. Coulis , N. Fromin , J.-F. David , J. Gavinet , A. Clet , S. Devidal , J. Roy , S. Hättenschwiler
Publication : Oikos
Date : 2025
Issue : November 2014
Pages : EV–1 – EV–13
Catégorie(s)
#ANR-Citation #CNRS #Ecotron de MontpellierAuteurs, date et publication :
Auteurs Alexandra Pardow , Christine Gehrig-Downie , Robbert Gradstein , Michael Lakatos
Publication : Biodiversity and Conservation
Date : 2025
Volume : 21
Issue : 14
Pages : 3637-3655
Catégorie(s)
#CNRS #FORET NouraguesRésumé
Little is known about the role of plant functional diversity for ecosystem-level carbon (C) fluxes. To fill this knowledge gap, we translocated monoliths hosting communities with four and 16 sown species from a long-term grassland biodiversity experiment ('The Jena Experiment') into a controlled environment facility for ecosystem research (Ecotron). This allowed quantifying the effects of plant diversity on ecosystem C fluxes as well as three parameters of C uptake efficiency (water and nitrogen use efficiencies and apparent quantum yield). By combining data on ecosystem C fluxes with vegetation structure and functional trait-based predictors, we found that increasing plant species and functional diversity led to higher gross and net ecosystem C uptake rates. Path analyses and light response curves unravelled the diversity of leaf nitrogen concentration in the canopy as a key functional predictor of C fluxes, either directly or indirectly via LAI and aboveground biomass.
Auteurs, date et publication :
Auteurs Alexandru Milcu , Christiane Roscher , Arthur Gessler , Dörte Bachmann , Annette Gockele , Markus Guderle , Damien Landais , Clément Piel , Christophe Escape , Sebastien Devidal , Olivier Ravel , Nina Buchmann , Gerd Gleixner , Anke Hildebrandt , Jacques Roy
Publication : Ecology Letters
Date : 2025
Volume : 17
Issue : 4
Pages : 435–444