Influences de la sécheresse de l'année 1972 sur la strate ligneuse

Abstract

The effects of the 1972 drought were particularly marked upon the tree layer on the IBP study site of Fété Olé, Sénégal. The period at which trees normally come into leaf was delayed, leaf production was strongly decreased, and the trees kept their leaves for a shorter time than usual. Few trees bore fruits or seeds and fruit and seed production was also very much smaller than it is usually the case. Many trees died, but mortality rates varied widely according to species, location and age. The commonest species can be classed as follows, according to their decreasing resistance to drought : Boscia senegalensis, Grewia bicolor, Balanites aegyp-tiaca, Commiphora africana, Acacia Senegal and Guiera senegalensis.