A5021685179- Plant Water Relations and Carbon Dynamics
- Soil Carbon and Nitrogen Dynamics
- Forest ecology and management
- Horticultural and Viticultural Research
- Peatlands and Wetlands Ecology
- Urban Heat Island Mitigation
- Fire effects on ecosystems
- Tree-ring climate responses
- Plant Physiology and Cultivation Studies
- Plant responses to elevated CO2
- Land Use and Ecosystem Services
- African Botany and Ecology Studies
- Leaf Properties and Growth Measurement
- Forest Management and Policy
- Remote Sensing and LiDAR Applications
- Remote Sensing in Agriculture
- Greenhouse Technology and Climate Control
- Forest Ecology and Biodiversity Studies
- Atmospheric and Environmental Gas Dynamics
- Agriculture and Rural Development Research
- Mycorrhizal Fungi and Plant Interactions
- Tree Root and Stability Studies
- Ecology and Vegetation Dynamics Studies
- Plant and animal studies
- Urban Green Space and Health
Université Clermont Auvergne
2012-2023
Physique et Physiologie Intégratives de l'Arbre en Environnement Fluctuant
2013-2023
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2017-2023
Ecologie fonctionnelle & biogéochimie des sols & des agro-systèmes
2018-2023
Institut National de la Recherche Agronomique du Niger
2013-2016
Centre National de la Recherche Scientifique
2011-2015
Écologie, Systématique et Évolution
2009-2015
Institut National de la Recherche Agronomique
2005-2012
Centre de Génétique Moléculaire
2011
AgroParisTech
2011
Abstract. Soil CO2 efflux is the main source of from forest ecosystems and it tightly coupled to transfer recent photosynthetic assimilates belowground their metabolism in roots, mycorrhiza rhizosphere microorganisms feeding on root-derived exudates. The objective our study was assess patterns carbon allocation among tree species along seasons. Pure 13CO2 pulse labelling entire crown three different (beech, oak pine) carried out at distinct phenological stages. Excess 13C soil tracked using...
• Phloem is the main pathway for transferring photosynthates belowground. In situ13C pulse labelling of trees 8–10 m tall was conducted in field on 10 beech (Fagus sylvatica) trees, six sessile oak (Quercus petraea) and maritime pine (Pinus pinaster) throughout growing season. Respired 13CO2 from trunks tracked at different heights using tunable diode laser absorption spectrometry to determine time lags velocity carbon transfer (V). The isotope composition phloem extracts measured several...
Abstract The contribution of leaf litter decomposition to total soil CO 2 efflux ( F L / ) was evaluated in a beech Fagus sylvatica L.) forest eastern France. Keeling‐plot approach applied estimate the isotopic composition respired from covered with either control (−30.32‰) or 13 C‐depleted (−49.96‰). δ C ranged −25.50‰ −22.60‰ and −24.95‰ −20.77‰, respectively, depleted above soil. ratio calculated by single isotope linear mixing model based on mass conservation equations. It showed...
établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics privés.
In plants, carbon source-sink relationships are assumed to affect their reproductive effort. fruit trees, likely be involved in fruiting behavior. apple, a large variability behaviors exists, from regular biennial, which has been related the within-tree synchronization vs desynchronization of floral induction buds. this study, we analyzed if assimilation, availability and fluxes as well shoot growth differ apple genotypes with contrasted behaviors. Another aim was determine scale plant...
Herbivore insects have strong impacts on leaf gas exchange when feeding the plant. Leaf age also drives exchanges but interaction of and phloem herbivory has been largely underexplored. We investigated amplitude direction herbivore impact across a wide range in apple tree–apple green aphid ( Aphis pomi ) system. measured (assimilation transpiration rates, stomatal conductance internal CO 2 concentration) leaves infested versus non-infested by age. For very young up to 15 days-old, rates were...
Abstract. Temporal dynamics of C isotopic composition (δ13C) CO2 and leaf litter was monitored during a decomposition experiment using Arbutus unedo L., as slow decomposing model substrate. This allowed us (1) to quantify discrimination variation decomposition, (2) test whether selective substrate use or kinetic fractionation could explain the observed discrimination. Total cumulative CO2-C loss (CL) comprised 27% initial C. evolution CL simulated following three-C-pool model. Isotopic...
Urban trees provide many ecosystem services, including carbon sequestration, air quality improvement, storm water attenuation and energy conservation, to people living in cities. Provisioning of services by urban trees, however, may be jeopardized the typically poor soils areas. Given their well-known multifunctional role forest ecosystems, ectomycorrhizal fungi (EcM) also contribute tree health thus service provisioning. Yet, no studies so far have directly related situ EcM community...
Urban trees play a key role in mitigating environmental problems cities, but they often face harsh conditions as generally grow sealed soils that have small rooting space and low water availability. In this context, rapid monitoring assessment of tree health status is critical to maintain urban secure the provisioning ecosystem services. Across three European cities we selected 187 Tilia tomentosa growing under following planting conditions: (i) sealed, planted soil pits or strips surrounded...
Abstract Photosynthetic carbon assimilation rates are highly dependent on environmental factors such as light availability and metabolic limitations the demand for by sink organs. The relative effects of photosynthesis in perennial plants trees remain poorly characterized. aim present study was therefore to characterize relationships between fruit load a range leaf traits including photosynthesis, non-structural carbohydrate content, structure, nitrogen-related variables fruiting (‘ON’)...