Auteurs, date et publication :
Auteurs Diego San Mauro , David J Gower , Hendrik Müller , Simon P Loader , Rafael Zardoya , Ronald A Nussbaum , Mark Wilkinson
Publication : Molecular Phylogenetics and Evolution
Date : 2025
Volume : 73
Pages : 177-189
Catégorie(s)
#CNRS #FORET NouraguesRésumé
Locally, plant species richness supports many ecosystem functions. Yet, the mechanisms driving these often-positive biodiversity–ecosystem functioning relationships are not well understood. Spatial resource partitioning across vertical resource gradients is one of the main hypothesized causes for enhanced ecosystem functioning in more biodiverse grasslands. Spatial resource partitioning occurs if species differ in where they acquire resources and can happen both above- and belowground. However, studies investigating spatial resource partitioning in grasslands provide inconsistent evidence. We present the results of a meta-analysis of 21 data sets from experimental species-richness gradients in grasslands. We test the hypothesis that increasing spatial resource partitioning along vertical resource gradients enhances ecosystem functioning in diverse grassland plant communities above- and belowground. To test this hypothesis, we asked three questions. (1) Does species richness enhance biomass production or community resource uptake across sites? (2) Is there evidence of spatial resource partitioning as indicated by resource tracer uptake and biomass allocation above- and belowground? (3) Is evidence of spatial resource partitioning correlated with increased biomass production or community resource uptake? Although plant species richness enhanced community nitrogen and potassium uptake and biomass production above- and belowground, we found that plant communities did not meet our criteria for spatial resource partitioning, though they did invest in significantly more aboveground biomass in higher canopy layers in mixture relative to monoculture. Furthermore, the extent of spatial resource partitioning across studies was not positively correlated with either biomass production or community resource uptake. Our results suggest that spatial resource partitioning across vertical resource gradients alone does not offer a general explanation for enhanced ecosystem functioning in more diverse temperate grasslands.
Auteurs, date et publication :
Auteurs Kathryn E. Barry , Jasper van Ruijven , Liesje Mommer , Yongfei Bai , Carl Beierkuhnlein , Nina Buchmann , Hans de Kroon , Anne Ebeling , Nico Eisenhauer , Claudia Guimarães‐Steinicke , Anke Hildebrandt , Forest Isbell , Alexandru Milcu , Carsten Neßhöver , Peter B. Reich , Christiane Roscher , Leopold Sauheitl , Michael Scherer‐Lorenzen , Bernhard Schmid , David Tilman
Publication : Ecology
Date : 2025
Volume : 101
Issue : 1
Pages : e02905
Catégorie(s)
#ANR-Citation #CNRS #Ecotron de MontpellierAuteurs, date et publication :
Auteurs P‐JG Malé , Céline Leroy , P Humblot , A Dejean , A Quilichini , J Orivel
Publication : Journal of Evolutionary Biology
Date : 2025
Volume : 29
Issue : 12
Pages : 2519-2529
Catégorie(s)
#CNRS #FORET NouraguesRésumé
The relationships that control seed production in trees are fundamental to understanding the evolution of forest species and their capacity to recover from increasing losses to drought, fire, and harvest. A synthesis of fecundity data from 714 species worldwide allowed us to examine hypotheses that are central to quantifying reproduction, a foundation for assessing fitness in forest trees. Four major findings emerged. First, seed production is not constrained by a strict trade-off between seed size and numbers. Instead, seed numbers vary over ten orders of magnitude, with species that invest in large seeds producing more seeds than expected from the 1:1 trade-off. Second, gymnosperms have lower seed production than angiosperms, potentially due to their extra investments in protective woody cones. Third, nutrient-demanding species, indicated by high foliar phosphorus concentrations, have low seed production. Finally, sensitivity of individual species to soil fertility varies widely, limiting the response of community seed production to fertility gradients. In combination, these findings can inform models of forest response that need to incorporate reproductive potential.
Auteurs, date et publication :
Auteurs Tong Qiu , Robert Andrus , Marie-Claire Aravena , Davide Ascoli , Yves Bergeron , Roberta Berretti , Daniel Berveiller , Michal Bogdziewicz , Thomas Boivin , Raul Bonal , Don C. Bragg , Thomas Caignard , Rafael Calama , J. Julio Camarero , Chia-Hao Chang-Yang , Natalie L. Cleavitt , Benoit Courbaud , Francois Courbet , Thomas Curt , Adrian J. Das
Publication : Nature Communications
Date : 2022
Volume : 13
Issue : 1
Pages : 2381
Catégorie(s)
#CNRS #FORET PuechabonAuteurs, date et publication :
Auteurs Olivier Ravel , Simon Chollet , R Mosseri , M. Bouzeghoub
Date : 2025
Pages : 242-243
Catégorie(s)
#CNRS #Ecotron de Montpellier #Ecotron IleDeFrance #ENSRésumé
Abstract
Asteraceae, the daisy family, are one of the most diverse families of angiosperms and are predominant in many ecosystems, including grasslands, deserts, savannas and high-elevation mountains. They are characterized by a peculiar inflorescence, the capitulum, which mimics a flower, but is actually made up of many tightly grouped florets. The capitulum is considered a key character underpinning the impressive evolutionary success of the family, and it plays a pivotal role in the economic importance of the family, given that many species are cultivated for their capitulum for agricultural and horticultural purposes. However, to date, there is still no comprehensive understanding of the extent of the morphological diversity of capitula across lineages of Asteraceae. This is mainly due to a lack of appropriate tools for describing such a complex and condensed structure. To address the problem, we present a protocol for characterizing the full diversity of capitula from any lineage of Asteraceae. This involves making a whole dissection of a capitulum from fresh material; it is simple and cost-effective and requires relatively easy-to-transport equipment meaning that it can be done during fieldwork.
Auteurs, date et publication :
Auteurs Lin Fu , Luis Palazzesi , Jaume Pellicer , Manica Balant , Maarten J M Christenhusz , Luca Pegoraro , Iván Pérez-Lorenzo , Ilia J Leitch , Oriane Hidalgo
Publication : Botanical Journal of the Linnean Society
Date : 2023
Volume : 201
Issue : 4
Pages : 391-399
Catégorie(s)
#CNRS #Lautaret #UGARésumé
The lichen collection of the alpine station of Lautaret developed by Georges Clauzade and Yves Rondon is a testimony to the early lichenological researches conducted in the region. Rich of 450 samples, with about 300 species, it includes nearly 60 of rare to very rare species which some have been observed for the first time in the area of the Lautaret.
Auteurs, date et publication :
Auteurs Juliette Asta , Christophe Perrier , Natacha Clairet
Publication : Bulletin de la Société Linnéenne de Lyon
Date : 2025
Volume : 88
Pages : 48
Catégorie(s)
#CNRS #Lautaret #UGARésumé
Et si nous pouvions « apprendre » aux arbres à résister aux sécheresses ? Ce reportage diffusé avec LeMonde.fr nous emmène dans le Luberon, où des scientifiques réduisent la mortalité des arbres en améliorant leurs interactions par les racines avec les bactéries et champignons. Ce qui pourrait transformer notre gestion des forêts face au changement climatique.
Auteurs, date et publication :
Auteurs
Date : 1970
Catégorie(s)
#CNRS #FORET O3HPAuteurs, date et publication :
Auteurs Jesus Rodrıguez-Calcerrada , Carsten Jaeger , Jean M Limousin , Jean M Ourcival , Richard Joffre , Serge Rambal
Publication : Functional Ecology
Date : 2025
Pages : 13
Catégorie(s)
#CNRS #FORET PuechabonAuteurs, date et publication :
Auteurs Isabelle Maréchaux , Laurent Saint‐André , Megan K Bartlett , Lawren Sack , Jerome Chave
Publication : Journal of Ecology
Date : 2025