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L'ancienneté n'est pas un déterminant majeur de la biodiversité dans les massifs forestiers des Préalpes du Nord

Abstract : To more thoroughly explore the relative effects of forest continuity and maturity on biodiversity, 70 sites were selected in the Prealps in a cross-section of ancient and recent forests (defined by whether the land has been occupied by a forest for more than 150 years or not) populated by immature stands (small diameter trees and little deadwood) or very mature ones (large girth trees and plentiful deadwood). At each site, forest continuity and maturity were determined and four taxonomic groups were inventoried: vascular flora, epiphytic macrolichens, springtails and saproxylic beetles. Results point to a very slight legacy effect deriving from past uses as opposed to a strong effect from maturity. This limited forest continuity effect, compared to previous studies, is related to the ecological, landscape and historical contexts of montane forests: high percentage of forest cover, low level of fragmentation, high proportion of ancient forests, cropping history with little impact and extensively managed forests. Our results underline that the forest continuity effect on biodiversity must be better studied in context.
Keywords : EPIPHYTE
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https://hal.inrae.fr/hal-02608670
Contributor : Migration Irstea Publications <>
Submitted on : Saturday, May 16, 2020 - 4:38:37 PM
Last modification on : Thursday, April 15, 2021 - 5:01:01 PM

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P. Janssen, M. Fuhr, Christophe Bouget. L'ancienneté n'est pas un déterminant majeur de la biodiversité dans les massifs forestiers des Préalpes du Nord. Revue forestière française, AgroParisTech, 2017, LXIX (4-5), pp.427-440. ⟨10.4267/2042/67870⟩. ⟨hal-02608670⟩

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