Results 51 to 60 of about 41,924 (216)

Réponse à la sécheresse de conifères indigènes et exotiques : une étude dendroécologique

open access: yesRevue Forestière Française, 2015
Dans le cadre des changements climatiques, une meilleure connaissance de la réponse à la sécheresse des arbres forestiers est un enjeu important pour les gestionnaires qui se posent de plus en plus de questions sur le choix des essences à favoriser dans ...
Mathieu Lévesque   +2 more
doaj   +1 more source

Opinion and report of the French Agency for Food, Environmental and Occupational Health & Safety (ANSES) relating to an analysis of the health risks associated with exposure to caterpillars with stinging hairs and the development of management recommendations

open access: yesFood Risk Assess Europe, Volume 3, Issue 2, April 2025.
Abstract Several species of Lepidoptera with caterpillars bearing urticating hairs are increasing their range in metropolitan France from year to year, such as the pine processionary (Thaumetopoea pityocampa Denis et Schiffermüller 1775) whose presence was historically limited to the south of France, and which is gradually being observed in the north ...
Nicolas Desneux   +105 more
wiley   +1 more source

Opinion and report of the French Agency for Food, Environmental and Occupational Health & Safety (ANSES) on the assessment of the impact of fox population dynamics on public health

open access: yesFood Risk Assess Europe, Volume 3, Issue 2, April 2025.
ABSTRACT The Red Fox (Vulpes vulpes) can be hunted as a game species. It may also be listed as a “species likely to cause damage” (ESOD – the acronym in French), for public health reasons among others. Conversely, benefits linked to the presence of foxes are also put forward, such as the predation of rodents carrying zoonotic agents.
Emmanuelle Gilot‐Fromont   +97 more
wiley   +1 more source

Influence des essences forestières arborescentes sur la productivité des bananiers au deuxième cycle cultural à Kinshasa, RDC.

open access: yesRevue Congolaise des Sciences et Technologies
Les systèmes sylvo-bananiers est une réponse efficace, d’une part, aux problèmes de l’amélioration de la productivité de bananiers, d’autre part, à la préservation de nos forêts, surtout dans les régions où la déforestation est accrue.
Jean Christian Bangata Bitha Nyi Mbunzu   +1 more
doaj   +1 more source

Light competition affects how tree growth and survival respond to climate

open access: yesJournal of Ecology, Volume 113, Issue 3, Page 672-688, March 2025.
We analysed the effect of light competition on tree growth and survival along both temperature and aridity gradients for the 33 major European tree species. We used forest data from nine European countries and the SamsaraLight ray tracing model. We found that the effect of light competition is weaker in stressful environments.
Nathéo Beauchamp   +12 more
wiley   +1 more source

Degradation and Fragmentation Effects on Structural Complexity in West‐African Forest Patches

open access: yesBiotropica, Volume 57, Issue 2, March 2025.
We use a terrestrial laser scanner in the forests of Togo, Benin, Nigeria, and Cameroon. Edge effects, such as reduced stand structural complexity, are pronounced in isolated forest patches with low connectivity. Structural complexity below the ecological reference indicates forest degradation.
Samuel Hepner   +5 more
wiley   +1 more source

Biopesticides d'origine végétale [PDF]

open access: yesTropicultura, 2006
Acid Neutralisation and Sulphur Retention in S-Impacted Andosols. La difficulté de planter des arbres fruitiers et forestiers dans les zones semi-arides provient du besoin en eau très important dès la plantation et durant toute la phase de croissance ...
Regnault-Roger, C.   +2 more
doaj  

Microdensitométrie sur arbres forestiers

open access: yes, 2006
La densité est une caractéristique importante du bois car elle va influencer sur ses propriétés mécaniques. La microdensitométrie est une technique d'étude des propriétés du bois qui vise à mesurer les variations de densité à l'intérieur du cerne. Le principe est d’analyser des clichés radiographiques numérisés d’échantillons de bois.
Millier, Frédéric   +2 more
openaire   +2 more sources

More species, more trees: The role of tree packing in promoting forest productivity

open access: yesJournal of Ecology, Volume 113, Issue 2, Page 371-386, February 2025.
The effect of tree species richness on maximum stand density in forest plots had been suspected before, but it had hardly ever been taken into account in biodiversity–ecosystem–functioning studies. Here the authors tackle this question by depicting the diversity‐stand density link in actual forests across Europe, and by testing its impact on ...
Xavier Morin   +12 more
wiley   +1 more source

Les ennemis de la forêt vus par les peintres

open access: yesRevue Forestière Française
Les principaux dommages aux arbres et aux forêts visibles en peinture sont dus à des causes abiotiques. En premier lieu, le vent qui fait pencher les arbres, les déforme durablement ou cause chablis et bris de branche ou de tronc.
Jean Pinon
doaj   +1 more source

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