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Demography of a savanna palm tree in Ivory Coast (Lamto): population persistence and life-history

Published online by Cambridge University Press:  21 November 2000

Sébastien Barot ,
Jacques Gignoux ,
Roger Vuattoux  and
Stéphane Legendre
Sébastien Barot
Affiliation:
Laboratoire d'Ecologie, UMR 7625, Ecole Normale Supérieure, 46 Rue d'Ulm, 75230 Paris cedex 05, France
Jacques Gignoux
Affiliation:
Laboratoire d'Ecologie, UMR 7625, Ecole Normale Supérieure, 46 Rue d'Ulm, 75230 Paris cedex 05, France
Roger Vuattoux
Affiliation:
Laboratoire d'Ecologie, UMR 7625, Ecole Normale Supérieure, 46 Rue d'Ulm, 75230 Paris cedex 05, France
Stéphane Legendre
Affiliation:
Laboratoire d'Ecologie, UMR 7625, Ecole Normale Supérieure, 46 Rue d'Ulm, 75230 Paris cedex 05, France
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Abstract

Borassus aethiopum is a dioecious palm tree of African savannas. A stage-classified matrix population model has been parametrized with field data (Lamto reserve, Ivory Coast). It enabled the study of the persistence of the population, and analysis of its sensitivity to different vital rates. Age of palms in each stage were estimated to complete the description of the palm life-history. The main results are: (1) The studied populations are very close to the equilibrium but the stable stage distribution (predicted by the model) and the observed distribution are significantly different indicating a former change in the vital rates. (2) Reproduction seems to be highly delayed (first reproduction on average at 114 y), while the estimated duration of the reproductive part of the life-cycle is relatively short (22 y).

Keywords

age estimationdemographyhumid savannamatrix population modelpalm treesenescencestage classified matrix model
Type
Research Article
Information
Journal of Tropical Ecology , Volume 16 , Issue 5 , September 2000 , pp. 637 - 655
Copyright
2000 Cambridge University Press

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