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Introduction
Publications
Publications (55)
Les effets de la densité du peuplement, du statut social et des conditions locales de bilan hydrique estival ont été analysés sur la résistance (Rt), la récupération (Rc) et la résilience (Rs) à la sécheresse de 2003. La croissance radiale a été étudiée sur 269 jeunes chênes sessiles échantillonnés dans le réseau d’expérimentations sylvicoles du GI...
Key message
An influence of the recent changes in temperature or rainfall was demonstrated, increasing background tree mortality rates for 2/3 of the 12 studied tree species. Climate change-induced tree mortality was exacerbated towards the warm or dry limits of the species ranges, suggesting in these areas a progressive replacement by more xeric s...
The important development of digital soil mapping (DSM) these last decades has led to a large number of maps of soil properties with increasingly finer raster size. Map resolution is mostly determined by expert knowledge or by matching with the resolution of existing data, while scale is recognized as a major issue. Using the pH and the C/N ratio d...
The leaf area index (LAI) is a key characteristic of forest stand aboveground net productivity (ANP), and many methods have been developed to estimate the LAI. However, every method has flaws, e.g., methods may be destructive, require means or time and/or show intrinsic bias and estimation errors.
A relationship using basal area (G) and stand age t...
Changes in temperature and rainfall linked to recent climate change increase the mortality rates of European temperate tree species. The economic importance of trees and the ecosystem services they provide differ according to their social status (dominant or suppressed trees) and their size. The extent to which climate change impacts these differen...
Key message
Decreasing stand density increases resistance, resilience, and recovery of
Quercus petraea
trees to severe drought (2003), particularly on dry sites, and the effect was independent of tree social status.
ContextControlling competition is an advocated strategy to modulate the response of trees to predicted changes in climate.AimsWe inves...
Decreasing stand density does not change the mean response to climate of Quercus petraea trees but increases resistance, resilience, and recovery to a severe drought (2003), particularly on dry sites, and the effect was independent of the tree social status.
Increases in tree mortality rates have been highlighted in different biomes over the past decades. However, disentangling the effects of climate change on the temporal increase in tree mortality from those of management and forest dynamics remains a challenge. Using a modelling approach taking tree and stand characteristics into account, we sought...
Supplementary data for article "Background mortality drivers of European tree species: climate change matters"
Context: Lowering stand density has been suggested to adapt forests to warmer and drier conditions. Whether common dendrometric rules used to guide growth models and support silviculture are still valid at these densities lower than usual needs be tested. This includes (1) estimating the stand growth-density relationship over wider density gradient...
Several studies use satellite-based normalized difference vegetation index (NDVI) to monitor the impact of climate change on vegetation covers. Good understanding of the drivers of NDVI patterns is hindered by the diffi- culties in disentangling the effects of environmental factors from anthropogenic changes, by the limited number of environmental p...
Key message
The diversity of forest management systems and the contrasted competition level treatments applied make the experimental networks of the GIS Coop, a nationwide testing program in the field of emerging forestry topics within the framework of the ongoing global changes.
Context
To understand the dynamics of forest management systems and...
The diversity of forest management systems and the contrasted competition level treatments applied make the experimental networks of the GIS Coop, a nationwide testing program in the field of emerging forestry topics within the framework of the ongoing global changes.
To understand the dynamics of forest management systems and build adapted growth...
Les effets de la densité du peuplement et de la sécheresse estivale ont été analysés sur la croissance en diamètre et en hauteur du Chêne sessile (Quercus petraea) à l’échelle du peuplement et de l’arbre. Les données des inventaires dendrométriques issues de deux réseaux d’expérimentations sylvicoles ont été utilisées (réseaux LERFOB et GIS Coop, 9...
Context. National forest inventories (NFI) have been little used to explore forest growth changes due to their limited temporal cover. Strong recent climatic warming renews their interest. The systematic and repeated cover of forest areas further enables explorations across a broad range of tree species and climatic gradients, and across spatial sc...
Results from a tree mortality modelling study in France using inventory data, in order to assess the importance of climate evolution intensity on mortality.
https://elsevier.conference-services.net/programme.asp?conferenceID=4168&action=prog_list&session=42462
Key messageRecent growth changes (1980–2007) in Western European forests strongly vary across tree species, and range from +42% in mountain contexts to −17% in Mediterranean contexts. These changes reveal recent climate warming footprint and are structured by species' temperature (−) and precipitation (+) growing conditions. ContextUnprecedented cl...
Key message
Tree resilience to drought was higher in drier sites and lower for suppressed trees grown in higher density stands, highlighting the role of acclimation and selection in tree responses to drought.
Abstract
Ongoing climate change will drive more frequent drought events in the future, with potential impacts on tree community structure an...
Aim: Knowledge about suitable ecological conditions for tree species remains largely incomplete. We aim to quantify and compare suitable environmental conditions for some of the most common tree species in Europe using a modelling approach and a large array of predictors that describe the different dimensions of the environmental niche.
Location:...
Even-aged forest stands are competitive communities where competition for light gives advantages to tall individuals, thereby inducing a race for height. These same individuals must however balance this competitive advantage with height-related mechanical and hydraulic risks. These phenomena may induce variations in height-diameter growth relations...
Nous avons modélisé sous SIG les différentes composantes nécessaires pour calculer le bilan en eau des sols, avec une résolution spatiale fine, inexistante auparavant. Ces données ont été validées, puis nous avons comparé différentes méthodes de calcul des bilans en eau et indices disponibles, mettant en évidence l'intérêt de l'utilisation de carte...
The purpose of the SILVAE portal (http://silvae.agroparistech.fr/home/) is to give a broad-based population access to spatial data for the whole of metropolitan France about forest plant species—mostly tree—together with the main factors that determine their ecology. The available information is classified by theme. The information concerns the bib...
Key message
Productivity changes in Norway spruce show important regional and local spatial variations, highlighting their context dependence at different spatial scales. These variations suggest the enhancing role of climate warming, and interplay with local water and nutrient limitations.
Abstract
While forest growth changes have been observed...
Study 1
In most dendroecological studies, climate–growth relationships are established for trees growing on pure stands. However, response to climate may be affected by inter-species interactions and local constraints which begs the question of the effect of mixture on tree growth response under various ecological conditions. To assess these effect...
A network for the long term observation of forest ecosystems has been established in the Observatoire
perenne de l’environnement (Permanent Environmental Observatory) created by the National Agency for
Radioactive Wastes. The network is located at the boundary between the Meuse and Haute-Marne departements
and comprises some hundred permanent inven...
Introduction. In pure and even-aged stands, the allometry between mean tree size and maximum stand density—or self-thinning relationship—has long been considered a constant among tree species. Although the self-thinning allometric coefficient has been shown to be species-dependent, estimates available for a given species also differ. Whether this c...
Ecological studies need environmental descriptors to establish the response of species or communities to ecological conditions. Soil water resource is an important factor but is poorly used by plant ecologists because of the lack of accessible data. We explore whether a large number of plots with basic soil information collected within the framewor...
A network for the long term observation of forest ecosystems has been established in the Observatoire pêrenne de l'environnement (Permanent Environmental Observatory) created by the National Agency for Radioactive Wastes. The network is located at the boundary between the Meuse and Haute-Marne départements and comprises some hundred permanent inven...
Changes in forest growth have been found in European forests and worldwide. However most observations have been derived from samples of restricted size, whose representativeness at a regional forest scale is questionable. National forest inventories provide an interesting perspective for both regional scale assessment of these trends and the invest...
Le simulateur est conçu suivant une architecture similaire à celle du simulateur Fagacées (Dhôte 1995, Dhôte et Le Moguedec 2005). Cette architecture est fondée sur 5 relations fondamentales : (i) un modèle de croissance en hauteur dominante permet d'apprécier l'indice de fertilité (IF) du peuplement et de prédire ses accroissements à tout âge, (ii...
Species choice is potentially an important management decision for increasing carbon stocks in forest ecosystems. The substitution of a slow-growing hardwood species (Quercus petraea) by a fast-growing conifer plantation (Pinus nigra subsp. laricio) was studied in central France. Simulations of carbon stocks in tree biomass were conducted using sta...
Aim To improve our understanding of species range limits by studying how height growth, a trait related to plant survival, varies throughout the geographic range of Fagus sylvatica L. in France.
Location The geographic range of beech in France, representing the western area of its European distribution, within which this species exhibits range dist...
Le présent projet se propose de : * calculer un ensemble d'indices sous SIG permettant d'enrichir les bases de données écologiques de l'IFN et de l'ENGREF, et d'améliorer la connaissance de l'écologie des espèces forestières. La mise à disposition de tels indices synthétiques faciliterait la création de typologies ou de cartographies des stations u...
La production potentielle du hêtre en France est déterminée par les ressources trophiques et la disponibilité en eau du sol, les températures et les précipitations. L'influence de ces facteur sur la production a été établie pour la plaine dans la moitié nord de la France et pour la montagne sur l'ensemble du territoire. A partir de cette étude réal...
Relationships between site index, environmental variables, and understorey vegetation were examined for Norway spruce (Picea abies (L.) Karst.) in the eastern part of France. The study area concerns all the native range of Norway spruce in France and the northeastern plains. The analysis is based on 2087 plots from the French National Forest Invent...
La gestion forestière vise des objectifs multiples: fonctions économiques, écologiques, sociales; maintien de la diversité, du rendement; pérennité des formations; gestion et conservation des ressources génétiques. Sur la base de connaissances et de modèles disponibles en matière de flux de gènes et de dynamique forestière, cette étude a permis: (1...
Norway spruce growth was investigated on the scale of eastern France to examine the feasibility of using the National Forest Inventory (NFI) data for establishing fertility indices as a function of various environmental parameters. The methodology used calls on a combination of several different data sources: the NFI dendrometric and ecological dat...
Une etude a ete menee sur la production de l'Epicea commun a l'echelle de l'Est de la France afin de tester la possibilite d'utiliser les donnees de l'Inventaire forestier national pour la construction d'indices de fertilite en fonction de differents parametres du milieu. La methodologie mise en place utilise la combinaison de plusieurs sources de...
