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：1996
卷号：7
期号：1
页码：17-24
出版社：John Libbey Eurotext
摘要：Authors Laurent Auclair , Mohamed Sghaier Zaafouri Orstom, BP 434, 1004 Tunis-El Menzah, Tunisie, Institut des régions arides, 6051 Nahal-Gabès, Tunisie Page(s) : 17-24 Published in: 1996 For several decades, the Tunisian State has been implementing a policy of sedentarisation in the south of the country. With former nomads being integrated info the market economy on a massive scale, it has been remarkably successful. Alongside this, however, considerable changes have occurred in the realm of energy: increased consumption of LPG, changes in the sexual division of labour, and in the means of transporting fuel. Pre-desert vegetation has to cope with heavy cropping pressure and there are no natural mechanisms to regulate it. In addition, illicit charcoal production in Nefzaoua has resulted in several Saharian species becoming eradicated, and jeopardises the forestry department’s struggle against desertification
