Crown fragmentation assessment in tropical trees : Method, insights and perspectives

Rutishauser Ervan, Barthélémy Daniel, Blanc Lilian, Nicolini Eric-André. 2011. Crown fragmentation assessment in tropical trees : Method, insights and perspectives. Forest Ecology and Management, 261 (3) : pp. 400-407.

Journal article ; Article de revue à facteur d'impact
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Quartile : Q1, Sujet : FORESTRY

Abstract : Decreasing growth rate (Feeley et al., 2007) and large die-back due to drought (Phillips et al., 2009) suggest that tropical forests are suffering recent climate changes. Forest vulnerability to external factors (e.g. air pollution, acid rain) is widely studied in northern countries, while only a few attempts have investigated crown integrity in the Tropics. The method needs to be generic enough to account for the large number of species and crown shapes encountered in tropical forests. In the present study, we developed and tested a novel field method that estimates crown fragmentation (main branch mortality (MB) and secondary branch mortality (SB)), liana infestation (LI) and crown position (CP) in the canopy. The relationship between crown fragmentation and annual growth rate (agr) was investigated through multiple regression. Six out of eight canopy tree species showed significant growth decline with increasing crown fragmentation. Higher probability of death was also found in trees with severe crown fragmentation. The capacity of such crown assessment to depict tree vitality in a forest stand is discussed along with potential applications in both forest science and management. (Résumé d'auteur)

Mots-clés Agrovoc : forêt tropicale, Houppier, Mortalité, Viabilité, Croissance

Mots-clés géographiques Agrovoc : Guyane française

Classification Agris : F62 - Plant physiology - Growth and development
U10 - Computer science, mathematics and statistics
K01 - Forestry - General aspects

Champ stratégique Cirad : Axe 6 (2005-2013) - Agriculture, environnement, nature et sociétés

Auteurs et affiliations

  • Rutishauser Ervan, CIRAD-BIOS-UMR AMAP (FRA)
  • Barthélémy Daniel, CIRAD-BIOS-DIR (FRA) ORCID: 0000-0003-3187-2517
  • Blanc Lilian, CIRAD-ES-UMR Ecofog (GUF)
  • Nicolini Eric-André, CIRAD-BIOS-UMR AMAP (GUF)

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