Projets Tutorés

Modeling of the regeneration of Angelique (Dicorynia Guianensis)

Guerrere Vincent, Petit Matthis, Piquet Marie, Sévelin-Radiguet Pauline

Reasoning on the future land use in the Amazon region and the Guiana must take care of the type of forestry applied in timber production area. The management of an important part of the Guyanese forest tries to strive to a sustainable exploitation. Sustainable management requires defining practices environmental
respectfulness (low felling cut, wood removal…). The lake of knowledge on the local tree species and its regeneration impose to develop research. This study deals with the tree Angelique Dicorynia guianensis), a large canopy tree species, and endemic to the French Guiana. This species is the first exploited and
commercialized species in this region. This study complements the knowledge about the Angelique’s dispersion and regeneration on the first stages of seedling life. ...

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Epicormic branches are indicative of slow radial growth in Eperua falcata Aublet (Caesalpiniaceae), a canopy tree of French Guiana.

Clément BARDON, Lucie LUSIGNAN, Bruno HERAULT, Eric NICOLINI

In the actual context of global changes, the vulnerability of tropical forests to extreme climatic anomalies was reported in many studies. Visual assessment of tree crowns has been employed in temperate environment to assess forest and individual tree response to air pollution and other stress factors. Crown assessment based on crown defoliation, is considered as one of the best indicator of tree vitality. In tropical forest, crown fragmentation in the canopy can be used to describe a growth decline and a relationship between architectural characters. Here we proposed to study the growth of Eperua falcata, a tropical canopy tree, using both architectural descriptors and epicormic branches. The aim of this study is to show that epicormic branches can be useful indicators of trees vigour and radial growth.

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