The book contains a Spanish section and an English section. This book is third and last in a series of three focusing on the deplorable development in the ceja de selva from Rodriguez de Mendoza to Soritor (Moyobamba). The interdisciplinary research at the regional level has shown how the natural and cultural landscape has changed dramatically over time, depending on the people, crops, and markets present. The forest with its biological diversity is disappearing fast along with the cultural remains from Pre-hispanic times. Archaeological, ethnohistorical, anthropological, botanical and geographical investigations present a status quo on the landscape changes and many of the problems the migrating colonos face in their new environment. The book is also a reminder for regional and national governments to take serious measures before the fragile landscape of the ceja de selva has lost its unique characteristics.