期刊名称：Science et changements planétaires / Sécheresse
印刷版ISSN：1147-7806
电子版ISSN：1777-5922
出版年度：2006
卷号：17
期号：4
页码：485-491
DOI：10.1684/sec.2006.0058
出版社：John Libbey Eurotext
摘要：Figures See all figures Authors Amadé Ouédraogo , Adjima Thiombiano , Karen Hahn-Hadjali , Sita Guinko Laboratoire de biologie et écologie végétales, Unité de formation et de recherche en sciences de la vie et de la terre, Université de Ouagadougou, 03 BP 7021 Ouagadougou 03 Burkina Faso, Geobotanik, Botanisches Institut, J.W.G, Universität Frankfurt am.M., Senckenberganlage 31-33, 60054 Deutchland Key words: aridity, Burkina Faso, degradation, forestry, regeneration, woody species DOI : 10.1684/sec.2006.0058 Page(s) : 485-91 Published in: 2006 Climatic aridity and anthropic pressure are mainly responsible for the decline of many woody species in Sudanian areas. Afzelia africana, Bombax costatum, Boswellia dalzielii, and Pterocarpus erinaceus are high-value but threatened species in Eastern Burkina Faso. This study assesses the state they are in based on the analysis of diameter classes and on field surveys of their natural unattended regeneration in permanent stands. The four species populations showed a strong declining dynamics characterized by aging trees and some regeneration difficulties in the establishment as well as in the development of saplings. Regeneration by root suckers and lignotubers is observed respectively for B. costatum and B. dalzielii on the one hand, and for A. africana and P. erinaceus, on the other hand. For these species, the slow growth of saplings is the main obstacle to their regeneration in a disturbed semiarid area.
关键词：aridity; Burkina Faso; degradation; forestry; regeneration; woody species
