Mémento du forestier tropical
Absorption racinaire de l’azote minéral chez le chêne sessile (Quercus petraea) et la molinie bleue (Molinia caerulea) e...
L’intensification du prélèvement forestier aboutit à une modification de la disponibilité des ressources (rayonnement, eau et éléments minéraux) dans la parcelle forestière. Cette dernière va réduire la régénération du peuplement en raison de la compétition entre les jeunes arbres et les espèces de sous-bois. La disponibilité en azote minéral du so...
Forest plant community as a driver of soil biodiversity. A large-scale assessment on collembolan assemblages through sta...
Plant-soil interactions are increasingly recognized to play a major role for terrestrial ecosystems functioning. However, few studies to date have focused on long-term dynamic ecosystems such as forests. Indeed, forest ecosystems are vertically stratified by multiple vegetation strata and the canopy cover manipulation through contrasted stand densi...
Is the interaction between waterlogging and drought a worsening factor in oak (Quercus petraea and Quercus robur) declin...
The purpose of this study was to explain decline in vitality of even-aged oak (Quercus robur and Q. petraea) stand observed in three sites located in the county of Allier (Auvergne, Central France). Our analysis showed that microclimatic variables measured under tree cover (air relative humidity and temperature, rainfall, radiation, and calculated ...
Rôle des interactions azote x eau du sol dans les rapports de compétition entre plantes, application à la régénération d...
L’identification de la succession et/ou de la combinaison des « drivers » pilotant la dominance d’un type d’espèces sur l’autre et la compréhension de leur interaction apparaissent cruciales afin d’améliorer la gestion des parcelles forestières dans le cadre des changements de pratique et de climat. Dans le passé, de nombreuses études se sont attac...
Forest management adaptation to climate change. A cornelian dilemna between drought resistance and soil macro-detritivor...
Global warming induces new constraints on forest ecosystems and requires forest management adaptation. The reduction of stand density is currently debated in France as a potential tool to face increasing summer drought risk by improving forest resistance to climate change-induced tree mortality. However, few studies have yet assessed the potential ...
Pinus nigra Arn. ssp salzmannii seedling recruitment is affected by stand basal area, shrub facilitation and climate int...
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Spanish Black pine forests in the Cuenca Mountains (Spain) have traditionally been managed using the shelterwood method. However the lack of natural regeneration has been one of the most important problems since the end of the 19th century, sometimes jeopardizing stand persistence. On this context, nurse shrubs and an adequate overstorey density ma...
Are thinnings favourable for understorey vegetation and biodiversity in oak forest of France?
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For most European temperate forests, recurrent droughts during seasonal growth are now recorded. To cope with these ongoing climate changes one attempt considered by forest managers is to reduce wood standing volume to globally decrease water consumption. Low wood standing volumes, and in particular a reduced tree leaf area index (LAI), globally le...
Evapotranspiration of understorey vegetation under drought and low stand density in temperate oak forest
In the context of ongoing increase of drought in temperate forests, forest managers consider the reduction of stand density (i.e. the number of standing trees at a given time) to limit soil water depletion. However, the reduction of tree canopy density increases light below canopy and allows the development of understorey vegetation. Knowing that t...
Réponse des assemblages de collemboles à la manipulation expérimentale de la densité des arbres le long d'un gradient d'...
De nouvelles contraintes exercées par le réchauffement climatique font actuellement pressions sur les écosystèmes forestiers et vont imposer une adaptation de leur gestion sylvicole pour préserver leur santé. Ainsi le plan forestier national incite maintenant les gestionnaires forestiers à appliquer un régime d’éclaircie plus intensif afin de rédui...
