J. André's scientific contributions
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Publications (7)
Le bois raméal fragmenté (BRF) est le matériau issu du broyage de branches de feuillus. Les pédologues estiment qu’il faut plus de mille ans pour restaurer un sol dégradé. La technique du BRF parviendrait au même résultat en quelques mois. Si le BRF se développe, il pourrait constituer un nouveau débouché pour la filière bois et les produits d’élag...
Les différents groupes fonctionnels et guildes dont relèvent les coléoptères saproxyliques sont présentés. La nomenclature est détaillée et les groupes écologiques sont replacés les uns par rapports aux autres dans les habitats que produit le bois mort ou en décomposition.
L'analyse en microscopie optique des contenus stomacaux d'adultes de Mycetom...
Dead wood supplies are investigated for 10 mountain forests in the French Alps. A detailed description of the method, based on the COST E4 protocol, is provided. Large quantities of dead wood, ranging from 24.8 to 91.7 m 3/ha, were found in both managed and unmanaged forests. The make-up of current dead wood supplies derives from a number of factor...
Les stocks de bois morts, leur origine et leur evolution dans le temps sont presentes pour 10 forets de montagne (etages montagnard et subalpin) des Alpes francaises. La methode employee, basee sur le protocole COST E4, est detaillee. Des quantites importantes de bois morts, de 24,8 a 91,7 m 3 /ha, ont ete observees, y compris dans des forets de pr...
Le bois mort, composante essentielle des forêts naturelles, est peu abondant dans la majorité des forêts
gérées (seulement 2,2 m3/ha en France en moyenne selon l’IFN). Cette lacune met en difficulté une biodiversité
spécifique, riche et originale par la perte d’habitats ou de nourriture, notamment pour les communautés
d’espèces cavicoles et saproxy...
Dead wood, an essential feature in natural forests, is generally scarce in managed forests (on average, only 2.2 m3/ha in France according to the iFN). This scarcity presents difficulties for maintaining a specific, rich and original biodiversity due to loss of habitats or nourishment, particularly for communities of cavity dwellers and saproxylic...
Citations
... Fallen deadwood and stumps can ensure natural regeneration as they provide nurse logs facilitating the germination of seedlings (HOFGAARD, 2000;VALLAURI et al., 2003;JEŽEK, 2004). Deadwood is also an important component for conserving and regulating carbon stock (HARMON, 2001;CORNWELL et al., 2009) as well as a key factor in nutrient cycling (KRANKINA and HARMON, 1995;LAIHO and PRESCOTT, 2004) and water-storing during dry periods thereby infl uencing the forest microclimate (HARMON et al., 1986). ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/279129019699244-1443560952664_Q64/Daniel-Vallauri.jpg)
... Indirectly, presence of bacteria and fungi in the wood of living and recently dead trees is proved by isolation experiments and e-DNA studies. A more accurate disclosure of assimilation and dietary role of fungi and bacteria would require the examination of larval gut content, also role of beetles as fungal vectors is studied by examining spores in guts (Dodelin et al. 2005). ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/278985381564420-1443526706526_Q64/Benoit-Dodelin.jpg)
... Deadwood dynamism plays an essential role: from standing deadwood (snag, girdled trees) to laying deadwood completely decayed, a complete succession will take place, where every stage will be characterized by microhabitats with specific physical and chemical, and their associated biodiversity (Gosselin et al., 2006;Schiegg Pasinelli and Sutter, 2000). It is clear that such a way of preserving each decomposition stage guarantees a 'temporal continuum' in the forest ecosystem (Dodelin et al., 2004;Gosselin et al., 2006). ...
Reference: Ilots de senescence in the manFor C.BD sites
![[object Object]](https://i1.rgstatic.net/ii/profile.image/276983649980422-1443049456396_Q64/Guy-Lemperiere.jpg)
... Sulla sua superficie, modellata da fratture e lacerazioni, trovano ospitalità briofite, muschi, licheni e corpi fungini. Le sue cavità sono nascondiglio per lumache, ricci, scoiattoli, ghiri, orbettini, nonché dimora per tritoni, salamandre e rospi se il tronco lambisce uno specchio d'acqua (Eynard-Machet et al. 2005). Esiste un ricco vocabolario legato alle forme e alle tem-poralità del legno in decomposizione. ...
... La ricchezza di insetti e altri invertebrati forestali dipende inoltre dall'età raggiunta dagli esemplari arborei, che come già osservato è molto minore nelle foreste gestite, e dalla quantità di necromassa (legno marcescente) al suolo. Relativamente a questa componente, si consideri che in ambienti forestali naturali europei sono stati rilevati valori di 75-160 m 3 /ha, contro 1-5 m 3 /ha presenti nelle foreste gestite (Vallauri et al., 2003). Età degli alberi e quantità di necromassa condizionano la disponibilità di microhabitat, ossia l'idoneità all'insediamento di organismi viventi, che è massima nelle foreste mature. ...
Reference: Atlante dei Chirotteri della Valle d’Aosta.
