Abstract

Background: Human impact over natural ecosystems located in Southern Mexico is increasingly evident. We generated a spatially explicit land use and cover change (LUCC) model to assess current and potential impact of human activities and to identify the influence of variables such as: distance to paved and unpaved roads, human settlements, rivers, slope and protected areas. Study site: Mesoamerican Biological Corridor located in the state of Chiapas (MBC-Ch), Mexico. Methods: We calibrated a model for the period 1993-2002 and ran a simulation for 2007 which we compared against the real 2007 land use and cover map to evaluate model's performance. We then projected LUCC to 2030 under three different scenarios: 1) Agriculture and Livestock (AGL), 2) Business As Usual (BAU) and, 3) Conservation (CON).natural protected areas had the opposite effect. The AGL scenario predicted a reduction of 43 and 41 % in the extent of closed tropical and temperate forests, respectively. In comparison, the BAU scenario predicted a reduction of 19.5 % in the area covered by closed tropical forest and of 30.1 % in temperate forests. The extent of land destined to agriculture and livestock activities increased by 22 and 15 % in the AGL and BAU scenarios, respectively. In contrast, the CON scenario predicted slight changes in the landscape. Conclusiones: Los modelos de simulacion indican queues altamente probable observar una reduccion en la extension de los ecosistemas presentes en el CBM-Ch de no implementarse una serie de medidas urgentes para mitigar el impacto del CCUS en la regien. .