Auteurs, date et publication :
Auteurs Sylvain Pincebourde , Christelle Suppo
Publication : Integrative and comparative biology
Date : 2025
Volume : 56
Issue : 1
Pages : 85-97
Catégorie(s)
#CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs Andrius Pašukonis , Katharina Trenkwalder , Max Ringler , Eva Ringler , Rosanna Mangione , Jolanda Steininger , Ian Warrington , Walter Hödl
Publication : Animal behaviour
Date : 2025
Volume : 116
Pages : 89-98
Catégorie(s)
#ANR-Citation #CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs Alexandru Marian Munteanu , Iris Starnberger , Andrius Pašukonis , Thomas Bugnyar , Walter Hödl , William Tecumseh Fitch
Publication : Behavioural processes
Date : 2025
Volume : 126
Pages : 71-75
Catégorie(s)
#CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs Gillian V Lui , David A Coomes
Publication : Environmental research
Date : 2025
Volume : 147
Pages : 580-589
Catégorie(s)
#CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs Mickal Houadria , Nico Blüthgen , Alex Salas‐Lopez , Mona‐Isabel Schmitt , Johanna Arndt , Eric Schneider , Jérôme Orivel , Florian Menzel
Publication : Ecology
Date : 2025
Volume : 97
Issue : 1
Pages : 225-235
Catégorie(s)
#CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs Michelle L Hart , Laura L Forrest , James A Nicholls , Catherine A Kidner
Publication : Taxon
Date : 2025
Volume : 65
Issue : 5
Pages : 1081-1092
Catégorie(s)
#CNRS #FORET NouraguesAuteurs, date et publication :
Auteurs Gerhard Gottsberger
Publication : Acta Botanica Brasilica
Date : 2025
Volume : 30
Issue : 2
Pages : 313-325
Catégorie(s)
#CNRS #FORET NouraguesRésumé
In alpine and arctic ecosystems, the snowpack has been shown to insulate soils from the winter climatic harshness. Ongoing climate change modifies snowpack quantity and quality, but the consequences of these changes on the soil functioning remain largely unknown. We benefited from a subalpine landscape of the French Alps where, 700 years ago, agricultural practices led to the formation of terraces. Subsequently, on each terrace, snow thickness patterns significantly differed between the bank and the front areas inducing strong divergence in their soil microclimatic conditions. Using this framework, we measured abundances and activities of nitrifiers and denitrifiers, together with a set of environmental variables, on three grassland terraces between December and May to test the following hypotheses: (i) soil N-related microbial abundances and activities are sensitive to soil microclimatic variations and differ along the terrace snow depth gradient during winter, (ii) a thicker snowpack favors higher abundances and activities, and (iii) the driving forces for nitrification and denitrification abundances and activities vary along the snow depth gradient. Our results showed significantly and changing N-related microbial activities and abundances during winter despite partly frozen soils, and suggested the selection and/or adaptation of psychrophilic microbial communities. Moreover, activities as well as abundances of nitrifiers and denitrifiers were significantly higher under a weak or absent snowpack during winter, and mostly related to soil water content and soil surface temperature according to our models. We suggest that strongly variable soil abiotic conditions at the front stations enabled the release of nutrients from soil organic and inorganic compounds favoring psychrophilic bacterial abundances and activities. Contrastingly, a thicker and permanent snowpack maintained circum-zero soil temperatures during winter which limited the microbial community's turnover and release of organic and inorganic N. This created N-limited conditions and N-competition between microbial populations resulting in lower abundances and activities. Overall, changes in the snowpack depth strongly affect the soil microbial functioning of subalpine grasslands with potential consequences on nutrient dynamic and other trophic levels.
Auteurs, date et publication :
Auteurs My-Dung Jusselme , Patrick Saccone , Lucie Zinger , Mathieu Faure , Xavier Le Roux , Nadine Guillaumaud , Lionel Bernard , Jean-Christophe Clement , Franck Poly
Publication : Soil Biology and Biochemistry
Date : 2025
Volume : 92
Pages : 27-37
Catégorie(s)
#CNRS #Lautaret #UGAAuteurs, date et publication :
Auteurs Ryan A St Laurent , Carlos GC Mielke
Publication : ZooKeys
Date : 2025
Issue : 566
Pages : 117
Catégorie(s)
#⛔ No DOI found #CNRS #FORET NouraguesRésumé
1. Empirical evidence and modelling both suggest that global changes may lead to an increased dominance of lianas and thus to an increased prevalence of liana-infested forest formations in tropical forests. The implications for tropical forest structure and the carbon cycle remain poorly understood. 2. We studied the ecological processes underpinning the structure and dynamics of a liana-infested forest in French Guiana, using a combination of long-term surveys (tree, liana, seedling and litter-fall), soil chemical analyses and remote-sensing approaches (LiDAR and Landsat). 3. At stand scale and for adult trees, the liana-infested forest had higher growth, recruitment and mortality rates than the neighbouring high-canopy forest. Both total seedling density and tree seedling recruitment were lower in the liana-infested forest. Stand scale above-ground biomass of the liana-infested forest was 58% lower than in the high-canopy forest. 4. Above-ground net primary productivity (ANPP) was comparable in the liana-infested and high-canopy forests. However, due to more abundant leaf production, the relative contribution of fast turnover carbon pools to ANPP was larger in the liana-infested forest and the carbon residence time was half that of the high-canopy forest. 5. Although soils of the liana-infested forest were richer in nutrients, soil elemental ratios suggest that liana-infested forest and high-canopy forest soils both derive from the same geological substrate. The higher nutrient concentration in the liana-infested forest may therefore be the result of a release of nutrients from vegetation after a forest blowdown. 6. Using small-footprint LiDAR campaigns, we show that the overall extent of the liana-infested forest has remained stable from 2007 to 2012 but about 10% of the forest area changed in forest cover type. Landsat optical imagery confirms the liana-infested forest presence in the landscape for at least 25 years. 7. Synthesis. Because persistently high rates of liana infestation are maintained by the fast dynamics of the liana-infested forest, liana-infested forests here appear to be the result of an arrested tropical forest succession. If the prevalence of such arrested succession forests were to increase in the future, this would have important implications for the carbon sink potential of Amazonian forests.
Auteurs, date et publication :
Auteurs Blaise Tymen , Maxime Rejou-Mechain , James W. Dalling , Sophie Fauset , Ted R. Feldpausch , Natalia Norden , Oliver L. Phillips , Benjamin L. Turner , Jerome Viers , Jerome Chave
Publication : JOURNAL OF ECOLOGY
Date : 2016
Volume : 104
Issue : 1
Pages : 149-159