A5085568384- Tree Root and Stability Studies
- Ecology and Vegetation Dynamics Studies
- Mycorrhizal Fungi and Plant Interactions
- Plant Water Relations and Carbon Dynamics
- Plant Pathogens and Fungal Diseases
- Agriculture and Rural Development Research
- Fungal Biology and Applications
- Plant and animal studies
- Forest ecology and management
- Insect and Arachnid Ecology and Behavior
- Cultural Insights and Digital Impacts
- Wood Treatment and Properties
- Mollusks and Parasites Studies
- Material Properties and Processing
- Plant responses to water stress
- Soil Geostatistics and Mapping
- Cerebral Palsy and Movement Disorders
- Plant Surface Properties and Treatments
- Environmental DNA in Biodiversity Studies
- Forest Biomass Utilization and Management
- Lepidoptera: Biology and Taxonomy
- Remote Sensing and LiDAR Applications
- Textile materials and evaluations
- Research Data Management Practices
- African Botany and Ecology Studies
Ecologie des Forêts de Guyane
2007-2024
AgroParisTech
2007-2024
Centre National de la Recherche Scientifique
2010-2024
Centre de Coopération Internationale en Recherche Agronomique pour le Développement
2010-2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2024
Université Clermont Auvergne
2007-2008
Guiana Space Centre
2007
Institut National de la Recherche Agronomique
2001
Tropical forests are a key component of the global carbon cycle. Yet, there still high uncertainties in forest stock and flux estimates, notably because their spatial temporal variability across tropics. Several upcoming spaceborne missions have been designed to address this gap. High-quality ground data essential for accurate calibration/validation so that biomass can reach full potential reducing regarding stocks fluxes. The BIOMASS mission, P-band SAR satellite from European Space Agency...
Abstract Key message Abundant Neotropical canopy-tree species are more resistant to drought-induced branch embolism than what is currently admitted. Large hydraulic safety margins protect them from failure under actual drought conditions. Context Xylem vulnerability embolism, which associated survival extreme conditions, being increasingly studied in the tropics, but data on risk of for lowland rainforest species, thought be highly vulnerable, lacking. Aims The purpose this study was gain...
Plastic tree-shelters are increasingly used to protect tree seedlings against browsing animals and herbicide drifts. The biomass allocation in young of deciduous trees is highly disturbed by common plastic tree-shelters, resulting poor root systems reduced diameter growth the trunk. shelters have been improved creating chimney-effect ventilation with holes drilled at bottom, stimulated trunk growth, but deficit has remained unchanged. An experiment was set up elucidate mechanisms behind...
Abstract Comprehensive studies on the processes involved in photosynthetic acclimation after a sudden change light regime are scarce, particularly for trees. We tested (i) ability of foliage walnut trees growing outdoors low‐to‐high and high‐to‐low transfers made early or late vegetation cycle, (ii) relative importance changes total leaf nitrogen versus partitioning between different functions during 2 month period transfer. Changes maximum carboxylation rate, light‐saturated electron...
Tree buckling risk (actual height/critical height) is an important biomechanical trait of plant growth strategies, and one that contributes to species coexistence. To estimate the diversity this among wide samples, a method minimizes damage plants necessary. On basis rarely used, complete version Greenhill's model (1881, Proceedings Cambridge Philosophical Society 4(2): 65–73), we precisely measured all necessary parameters on sample 236 saplings 16 species. Then, using sensitivity...
Gravitropism is necessary for plants to control the orientation of their axes while they grow in height. In woody plants, stem re-orientations are costly because achieved through diameter growth. The functional diversity gravitropism was studied check if mechanisms involved and efficiency may contribute differentiation height growth strategies between forest tree species at seedling stage. Seedlings eight tropical were grown tilted a greenhouse, up-righting movement measured over three...
Abstract Soil nutrients and water availability are strong drivers of tropical tree species distribution across scales. However, the physiological mechanisms underlying environmental filtering along these gradients remain incompletely understood. Previous studies mostly focused on univariate variation in structural traits, but a more integrative approach combining multiple traits is needed to fully portray functional strategies. We measured nine leaf related trees' resource capture hydraulic...
Little is known regarding how trophic interactions shape community assembly in tropical forests. Here we assess multi-taxonomic rules using a rare standardized coordinated inventory comprising exhaustive surveys of five highly-diverse taxonomic groups exerting key ecological functions: trees, fungi, earthworms, ants and spiders. We sampled 36 1.9-ha plots from four remote locations French Guiana including precise soil measurements, tested whether species turnover was among across geographic...
Summary A method for measuring shrinkage resulting from drying in the three anisotropic directions is developed and tested. Measurements are performed on sawn discs, a technique which simplifies preparation enables large numbers of measurements. Shrinkage values can be represented as map disc surface. The results indicate that comparisons between distribution tension wood discs show clear relationship measured with relatively high accuracy reference to “shrinkage map”. In long term, this...
The Black Curassow (Crax alector) is a large game bird with Vulnerable conservation status found in north-central South America. We examined its distributional pattern across French Guiana using number of environmental descriptors at 3 scales analysis: landscape, forest type, and microhabitat. used hierarchical model temporary emigration imperfect detection for data collected by standard distance sampling methods 35 study sites. At the landscape scale, density decreased hunting pressure...
Abstract In Amazonia, the knowledge about Fungi remains patchy and biased towards accessible sites. This is particularly case in French Guiana where existing collections have been confined to few coastal localities. Here, we aimed at filling gaps of undersampled areas this region, focusing on Basidiomycota. From 2011, comprehensively collected fruiting-bodies with a stratified reproducible sampling scheme 126 plots. Sites reflected main forest habitats terms soil fertility topography. The...
Abstract The influence exerted by tree communities, topography, and soil chemistry on the assembly of macrofungal communities remains poorly understood, especially in highly diverse tropical forests. Here, we used a large dataset that combines inventories Basidiomycetes fruiting bodies, species composition, measurements for 16 physicochemical parameters, collected 34 plots located four sites lowland rain forests French Guiana. Plots were established three different topographical conditions:...
Résumé Dans notre pratique d’ergothérapeutes, nous relevons fréquemment des différences notables de résultats d’un même patient à trois tests copie figures, utilisées en pédiatrie dans le domaine troubles d’apprentissage. Cette étude compare ces épreuves : celle du « Beery-Buktenica Developmental Test of Visual-Motor Integration » 4 e version Beery et Buktenica, 1997 (Beery VMI), la NEPSY, bilan neuropsychologique l’enfant Korkman, Kirk Kemp, 2003 (Nepsy) Visual Perception-2 Hammill, Pearson...
This dataset represents a reference library of DNA sequences for ants from French Guiana. A total 3931 new the 16S rRNA gene has been generated. The covers 344 species distributed in 57 genera. Overall, 3920 have assigned at level and 11 genus level. All these were submitted to DDBJ/EMBL/GenBank databases Bioproject: PRJNA779056: Guiana Ants (Hymenoptera: Formicidae), sequence identifier KFFS00000000.