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Vulnerability of commercial tree species to water Stress in logged forests of the Guiana Shield

Fargeon Hélène, Aubry-Kientz Mélaine, Brunaux Olivier, Descroix Laurent, Gaspard Romain, Guitet Stéphane, Rossi Vivien, Hérault Bruno. 2016. Vulnerability of commercial tree species to water Stress in logged forests of the Guiana Shield. Forests, 7 (5):105, 21 p.

Journal article ; Article de recherche ; Article de revue à facteur d'impact Revue en libre accès total
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Quartile : Q1, Sujet : FORESTRY

Abstract : The future of tropical managed forests is threatened by climate change. In anticipation of the increase in the frequency of drought episodes predicted by climatic models for intertropical regions, it is essential to study commercial trees' resilience and vulnerability to water stress by identifying potential interaction effects between selective logging and stress due to a lack of water. Focusing on 14 species representing a potential or acknowledged commercial interest for wood production in the Guiana Shield, a joint model coupling growth and mortality for each species was parametrized, including a climatic variable related to water stress and the quantity of aboveground biomass lost after logging. For the vast majority of the species, water stress had a negative impact on growth rate, while the impact of logging was positive. The opposite results were observed for the mortality. Combining results from growth and mortality models, we generate vulnerability profiles and ranking from species apparently quite resistant to water stress (Chrysophyllum spp., Goupia glabra Aubl., Qualea rosea Aubl.), even under logging pressure, to highly vulnerable species (Sterculia spp.). In light of our results, forest managers in the Guiana Shield may want to conduct (i) a conservation strategy of the most vulnerable species and (ii) a diversification of the logged species. Conservation of the already-adapted species may also be considered as the most certain way to protect the tropical forests under future climates. (Résumé d'auteur)

Mots-clés Agrovoc : forêt tropicale, Changement climatique, Aménagement forestier, Croissance, Mortalité, Stress dû à la sécheresse, Espèce en danger, Abattage d'arbres, Ressource forestière, protection de la forêt, Espèce protégée

Mots-clés géographiques Agrovoc : Guyane française

Mots-clés complémentaires : Exploitation forestière, Essence commercialisable

Mots-clés libres : Climate change, Growth rates, Mortality rates, Paracou, Selective logging

Classification Agris : K10 - Forestry production
F60 - Plant physiology and biochemistry
P40 - Meteorology and climatology
P01 - Nature conservation and land resources

Champ stratégique Cirad : Axe 6 (2014-2018) - Sociétés, natures et territoires

Auteurs et affiliations

  • Fargeon Hélène
  • Aubry-Kientz Mélaine, UAG (GUF)
  • Brunaux Olivier, ONF (GUF)
  • Descroix Laurent, ONF (GUF)
  • Gaspard Romain, CIRAD-ES-UMR Ecofog (GUF)
  • Guitet Stéphane, CIRAD-BIOS-UMR AMAP (FRA)
  • Rossi Vivien, CIRAD-ES-UPR BSef (CMR) ORCID: 0000-0001-5458-1523
  • Hérault Bruno, CIRAD-ES-UMR Ecofog (GUF) ORCID: 0000-0002-6950-7286

Source : Cirad-Agritrop (https://agritrop.cirad.fr/580799/)

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