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Modifications à long terme, déjà constatées, de la productivité des forêts françaises

Abstract : Several recent European studies have shown that tree growth and stand yield have strongly increased over the past 150 years. In this article, we propose a critical review of the methods used : retrospective analyses of radial growth (dendroecology) or height growth (stem analyses) ; continuous observation of stand yield using permanent plot networks. The advantages and drawbacks of each method are compared, in the light of studies on the effect of environmental changes (CO2, nitrogen inputs, climate) on forest dynamics. The first accurate diagnoses at stand level are beginning to be available, and indicate that today's stand productivity is 50% higher than at the beginning of this century. Major research areas are now: 1) to generalise the observations to others species and regions, especially at the stand-level ; 2) to evaluate the concomitant changes in wood quality ; 3) to better understand the role of environmental changes ; 4) to evaluate the associated ecological risks. In any case, we believe that forest managers should take this accelerated growth into consideration (shorter rotations, increased wood supply, intensified regeneration, forest contribution to policies to mitigate "greenhouse effects", etc.).
Mots-clés : EFNO CEMAGREF FRANCE
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Journal articles
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https://hal.inrae.fr/hal-02579744
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Submitted on : Thursday, May 14, 2020 - 7:46:41 PM
Last modification on : Friday, June 25, 2021 - 12:08:07 PM

Identifiers

  • HAL Id : hal-02579744, version 1
  • IRSTEA : PUB00009158

Citation

J.F. Dhote, J.L. Dupouey, Laurent Bergès. Modifications à long terme, déjà constatées, de la productivité des forêts françaises. Revue forestière française, AgroParisTech, 2000, pp.37-48. ⟨hal-02579744⟩

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