Dynamics in landscape structure and composition for the Chorotega region, Costa Rica from 1960 to 2000

Studies of forest fragmentation in the tropics have systematically paid more attention to understanding processes contributing to the formation of landscapes that are the product of deforestation, while little or no attention has been paid to forested landscapes that are the product of secondary growth processes. In this paper, using information of forest cover from 1960 to 2000 derived from aerial photography and remote sensing data, we examine the dynamics associated with deforestation and secondary growth processes at the Chorotega region, Costa Rica. Our analysis is conducted using a comprehensive land capability map developed for the country. Our results indicate the occurrence of two well-defined land cover change processes over time. Extensive/intensive cattle ranching practices that contribute to significant forest degradation and forest cover loss characterize the first of these processes, occur-ring between 1960 and 1980. The second period (1980-2000) is characterized by a dynamic process of secondary forest growth resulting from a combination of internal and international market forces and conservation initiatives. Conclusions from this paper indicate that more attention needs to be paid to tropical secondary landscapes that are recuperating from years of constant degradation. This natural recovery process could be beneficial for biodiversity recovery, biological corridors and environmental services. (c) 2004 Elsevier B.V. All rights reserved.