Jean-Luc Dupouey

French National Research Institute for Agriculture, Food, and Environment (INRAE) · SILVA research unit

The chemical composition of the wood reflects the composition of the soil over which the corresponding tree has developed. Multi-elemental and isotopic signatures, which are characteristic of the soil and underlying rock substrates, are potentially powerful tools for determining wood provenance. These tracers are of special interest for charred arc...

Key message Fifteen species are most susceptible to require vegetation control during tree regeneration in the range of our study. Among these 15 species, Rubus fruticosus , Pteridium aquilinum , and Molinia caerulea cover each more than 300,000 ha of open-canopy forests. Context Vegetation control, i.e., the reduction of competitive species cover...

Differences in understory vegetation between ancient and recent forests have been thoroughly explored; however, few studies have investigated the legacies of different former land uses in recent forests. Indeed, due to more intense agricultural practices (tillage and fertilisation), legacy effects are expected to be stronger in former cropland or m...

Ancient forests are known to host a biodiversity of high ecological distinctiveness and are likely to provide habitat for red-listed species. Yet, few studies have investigated the role of forest continuity for the conservation of threatened species. We used species-presence data on red-listed species from 12 taxonomic groups (Spermatophyta, Pterid...

Ce numéro de la Revue forestière française, faute de connaissances scientifiques partout bien établies, n’aborde que marginalement certaines questions : il en est ainsi en particulier des contributions respectives des forêts gérées et des forêts en libre évolution comportant bois sénescents et bois mort, dans le stockage du carbone, et de la résili...

Après une brève mise au point terminologique et sémantique sur le concept de libre évolution, proche de celui de naturalité, les éditeurs de ce numéro thématique en présentent les enjeux forestiers, la spécificité européenne et les attentes variées et parfois contradictoires des divers acteurs, gestionnaires en charge de la forêt et de l’environnem...

Le plan France Relance lancé en septembre 2020 prévoit des mesures forestières sur 2 ans, avec un accent sur la reconstitution des peuplements forestiers sinistrés, affaiblis par les sécheresses ou attaqués par les scolytes. Cependant la crise forestière liée au changement climatique est partie pour durer et les efforts sur les connaissances à acqu...

Dans cette mise au point sémantique, nous proposons de formaliser une série de définitions des termes les plus fréquemment utilisés pour qualifier une forêt selon son degré d’anthropisation. La forêt est appréhendée ici sous sa dimension écosystémique, incluant biotope et biocœnose. Dans un souci de robustesse conceptuelle, nous nous appuyons sur q...

Oak (Quercus petraea (Matt.) Liebl. and Quercus robur L. grouped), European beech (Fagus sylvatica L.) and hornbeam (Carpinus betulus L.) are three major species of western and central European forests. When conditions are suitable for the three species, silvicultural management often favours oak because of its greater economic interest. Forest man...

Located in the core zone of Mulun National Nature Reserve in northern Guangxi, the limestone cave Ganxiao Dong harbours the richest cave fauna currently known in China. In total, 26 species of cave invertebrates have been recognized so far, in spite of limited sampling efforts. Of them, 20 are troglobionts or stygobionts, including one snail, four...

Aim Climate warming reshuffles biological assemblages towards less cold‐adapted but more warm‐adapted species, a process coined thermophilization. However, the velocity at which this process is happening generally lags behind the velocity of climate change, generating a climatic debt the temporal dynamics of which remain misunderstood. Relying on h...

L’observatoire des peuplements dévastés et mités mis en place quelques années après la tempête de 1999 a permis le suivi pendant 20 ans de la reconstitution forestière en l’absence de travaux sylvicoles. Le travail d’analyse des données propose des éléments de diagnostic sur la façon de discriminer les situations où la régénération naturelle est su...

Bud-burst and leaf-senescence determine the length of the growing season for deciduous trees and therefore the duration of potential carbon assimilation with consequences on biomass production. In Fagus sylvatica L., leaf phenology depends on both photoperiod and temperature. The future climate is expected to induce more frequent soil water deficit...

Key message French forests exhibit the fastest relative changes across Europe. Growing stock increases faster than area, and is greatest in low-stocked private broadleaved forests. Past areal increases and current GS levels show positive effects on GS expansion, with GS increases hence expected to persist. ContextStrong increases in growing stocks...

Aim Climate change is known to be a driver of changes in forest plant communities and to modify disturbance regimes. We investigated whether forest gaps favoured vegetation adaptation to warmer climates by accelerating the shift of plant communities to a warmer‐adapted composition independently of canopy closure linked to natural forest dynamics....

The organization committee of the HEF2020 invites abstract submissions for oral and / or poster to the four sessions of the conference : 1. Historical heritage and conservation management 2. Environmental resource exploitation 3. Ecological dynamics 4. Methods and tools in historical ecology See more about the session here: https://symposium....

Understanding how climate and soil hydrology control tree growth is critical to predict the response of Siberian ecosystems to climate change. The general aim of this study was to (i) characterize the soil water budget and identify the factors controlling aspen (Populus tremula L.) radial growth in south-western Siberia, and (ii) assess its potenti...

Soil properties vary spatially according to land use; both because land users have selected specific soil properties for specific land uses, and land uses modify the soil properties. However, permanent environment factors and land-use effects are unlikely to display the exact same spatial patterns. Study of the spatial and historical patterns of di...

Land use legacies on current vegetation, thoroughly studied in temperate regions, was investigated in a Mediterranean context. We tested the effect of three historical variables on current forest plant communities and traits: forest temporal continuity (ancient: forested before 1,860, recent: reforested after 1,860, and very recent forest: reforest...

Forest area has dramatically increased since the beginning or middle of the 19th century in European countries. At least half of the forests present today have grown on formerly cultivated lands, pastures or heathlands. However, net forest expansion largely masks a slow but irretrievable erosion of ancient forests. Meanwhile, forest resource harves...

Through the variations in their dimension, density, anatomy or isotopes composition, tree rings have provided invaluable proxies to evaluate past changes in the environment. Whereas long-term records of changes in soil fertility are particularly desired for forest ecosystem studies, the use of the chemical composition of tree rings as potential mar...

Species richness is a key variable in measuring diversity of ecological communities. It is crucial to get reliable estimates for the number of plant species in space (mapping) and-even more important in the context of monitoring-over time. Therefore, knowledge on error rates related to recordings of species numbers should be considered in such inve...

Les cartes prédictives de pH sont utilisées pour évaluer la distribution spatiale des aires appropriées des espèces d’arbres et leur potentiel de croissance. Cependant, la capacité à élaborer ces cartes à large échelle pour décrire les variations locales du pH est supposée être faible. Ces cartes n'intègrent généralement pas l’occupation ancienne d...

• Oaks are dominant forest tree species widely distributed across the Northern Hemisphere, where they constitute natural resources of economic, ecological, social and historical value. Hybridization and adaptive introgression have long been thought to be major drivers of their ecological success. Thus, the maintenance of species barriers remains a...

From 1903–1904 to 1988–1989, the two World Wars and sociological factors as rural desertification and changes in land uses mainly explained the decline of black truffle production in the Vaucluse department, which well reflects that of the whole of France. These can be correlated with the annual climatic variations as well as, from 1924–1925 to 194...

How to move forward if we cannot understand our present from our past? The same applies for the study of ecosystems. Evidence of ecological legacies in temperate post-agricultural forests has been provided on soil physico-chemical properties and understory vegetation richness and composition, which led to distinguish ancient and recent forests. How...

Several lidar missions have been carried out in Lorrain since 2007, including the surveys of the Haye forest as well as surveys for rescue archaeology purposes encompassing the construction of the high-speed rail connection Paris-Strasbourg. Analyses of this micro-topographic database covering some 240 km² of woodlands have provided evidence of con...

In Boulanger et al (2018), we investigated the effects of ungulates on forest plant diversity. By suggesting a revisit of our conclusions regarding ecosystem dynamics since the late Pleistocene, Fløjgaard et al (2018) came to the conclusion that moderate grazing in forest should be a conservation target. Since major points of our paper were mis- or...

Large wild ungulates are a major biotic factor shaping plant communities. They influence species abundance and occurrence directly by herbivory and plant dispersal, or indirectly by modifying plant-plant interactions and through soil disturbance. In forest ecosystems, researchers’ attention has been mainly focused on deer overabundance. Far less is...

Context Land use and land cover (LULC) change is a major part of environmental change. Understanding its long-term causes is a major issue in landscape ecology. Objectives Our aim was to characterise LULC transitions since 1860 and assess the respective and changing effects of biophysical and socioeconomic drivers on forest, arable land and pastur...

Deer populations have dramatically increased over the last decades in Western Europe and their browsing has affected forest vegetation, especially plant community composition. High deer browsing pressure may threaten forest ecosystems and needs to be assessed over the long run. However, few studies to date have addressed the long-term impact of dee...

Based upon the historical data—obtained from the French National Forest Inventory—on the tree species’ productivities, assimilated to be a measure of return on investment, as well as on their variances as sources of risk, we apply the portfolio selection theory in order to optimize the species distributions in France. We thus determine the optimal...

Questions: What are the patterns of plant communities in terms of richness and floristic composition along stable forest–grassland interfaces? Are there specific species at the edge and/or specialist species transgressions between adjacent habitats? How does edge displacement following land-use change alter distance-to-edge plant diversity patterns...

Large-scale tree distribution changes have received considerable attention but underlying demo-genetic mechanisms are less well documented. We used a diachronic approach to track species shifts in a mixed oak stand (Quercus petraea-Quercus robur) at a fine spatiotemporal scale. Species assignment was made using single nucleotide polymorphism (SNP)...

Written sources and archaeological evidence suggest that coppicing was a common practice in past woodland management. Depending mainly on the length of rotations, coppices provided wood products of various sizes, and coppice-wood has been identified in fuel-wood remains as well as in timber studies. Assigning the origin of the wood analyzed to copp...

Charcoal analysis aims to study different aspects of forest management, techno-economical choices and their specific impact on past landscapes, as well as the impact of climatic events. However, at the present time, charcoal analysis is generally limited to the study of a list of taxa and their relative frequency, as the methods usually employed in...

Forêts anciennes. Mettre l’histoire à profit

Nous avons distingué trois types d'interactions entre la biodiversité et l'adaptation des forêts au changement climatique : (i) l'adaptation de la sylviculture en vue du maintien des services rendus par la forêt, en particulier la production de bois, aura des conséquences indirectes sur la biodiversité; (ii) la biodiversité pourra en partie aider à...

Les forêts françaises ont doublé de surface depuis le début du XIXe siècle. Elles sont donc composées au moins pour moitié d'anciennes terres cultivées, de pâtures et de landes. Cet article synthétise les connaissances sur le rôle clé que joue l'utilisation passée des terres sur les écosystèmes forestiers, notamment la diversité et la composition d...

Après des siècles de diminution de sa surface, la forêt a connu un minimum historique en France vers le début du XIXe siècle puis a augmenté depuis, notamment en Provence. Les déterminants biophysiques, socioéconomiques et paysagers de ces changements forestiers à long terme ont cependant été assez peu explorés. Cette étude vise à analyser les tran...

Les parcs nationaux métropolitains, qui ont connu une forte progression de leur surface forestière depuis le milieu du XIXe siècle, s'intéressent depuis plusieurs années aux forêts anciennes. Après les avoir identifiées, ils souhaitent mieux connaître leurs spécificités pour pouvoir les préserver et proposer des mesures de gestion adaptées. La comp...

La délimitation de forêts dites anciennes, caractérisées par une longue continuité temporelle de l'état boisé, impose le recours à des sources cartographiques. Quand un tel travail est entrepris sur une vaste surface, l'examen systématique de toute la documentation existante est exclu, et il faut alors définir un unique corpus cartographique qui pu...

L’expansion en surface et en stock sur pied de la forêt française est étudiée à partir des données d’inventaire forestier national et de la statistique Daubrée (1908). Son hétérogénéité géographique, selon la propriété (privée, domaniale, autre forêt publique soumise), et la composition ligneuse (feuillus/résineux) a été examinée. Entre 1908 et 201...

Soil moisture and nutritional characteristics are frequently assessed using plant species and community bioindication, e.g., the Ellenberg system of species indicator values. This method, based on complete inventories of plant species present in plots, is time-consuming, which could prevent its general use for forest or other natural land managemen...

QuestionsHow did past land use and conifer plantation affect understorey plant communities? What plant traits explain understorey vegetation response to agricultural past land use and coniferous plantation?LocationForest of Orleans (50000ha), Loiret, north-central France.Methods Canopy cover, herb layer composition, litter and soil properties were...

Après des siècles de déboisements, la surface forestière a presque doublé depuis le XIXe siècle en France, avec une transition forestière plus marquée en contexte montagnard et méditerranéen. Cette augmentation nette peut cependant cacher des déboisements et des reboisements qui ne se sont pas faits dans les mêmes conditions de milieu, induisant un...

To disentangle whether long-range periphery-to-core gradient of forest understorey plants could be attributed to past forest landscape and/or to current environmental filtering processes. We investigated (1) whether species response to past land use (ancient versus recent forest) was consistent with species response to distance to present forest ed...

La notion de continuité tant dans l’espace que le temps occupe une place croissante dans la préservation de la biodiversité. Nous expliquons pourquoi il est important d’identifier les secteurs où le manque de connectivité fragilise ou ne permet pas les flux de biodiversité. Si les connaissances sont souvent partielles, notamment sur la capacité de...

Supplementary resources of Labbé et al. 2015 "Pre-existing forests as sources of pathogens? The emergence of Armillaria ostoyae in a recently planted pine forest".

Trends in species diversity represent an important challenge to be addressed by forest monitoring in response to environmental changes, of which climate is critical. However assessing such changes faces methodological issues. Useful lessons can be drawn from practical experience. In France, forest ecosystems have been intensively monitored since 19...

Key message Thanks to the concomitant recordings of vegetation and deer browsing sampled first in 1976, then resurveyed in 2006, we show that forest plant communities shifted in response to deer population dynamics, stand management and eutrophication. Context and aims : High deer populations alter forest understory dynamics worldwide. However, no...

The specifics of forest ecosystems require a strategy of soil fertility assessment distinct from that commonly used in agro-­‐ecosystems. Existing indicators fall into three main approaches. The first is to estimate the availability of resources (water, minerals) considering the size of the pools and the dynamics of supply. A second is based on the...