The National Park of Guadeloupe is in charge of the land management of the leeward side of the island (Côte Sous le Vent, CSV). Recently a program has been set up in order to promote a sustainable development plan (Le Parc 1999). A range of altitude from 0 m to more than 800 m (with many mountainous parts) characterises this CSV. Natural, agricultural and urban spaces are gradually distributed according to altitude, climatic constraints and biophysical conditions, from the dry lowlands (coastal region) to the humid hillsides. Unfavourable economic conditions, inadequate land management policies and natural disasters have been responsible for the low level of development of CSV. On the contrary, valuable human and natural characteristics - among them, traditional integrated crop-tree-livestock systems, very attractive and diverse landscapes and high biodiversity of natural and agricultural spaces - could support this new program. In that sense, an inter-disciplinary co-operation between forestry and land management agents and livestock researchers is now being carried out in the field of agrosilvopastoral systems. Objectives are to enhance their environmental services (landscapes modelling for tourism development, biodiversity and soils conservation, rehabilitation of degraded forest or pasturelands), to increase livestock productivity and finally to identify decision-making tools.