MULTITEMPORAL ANALYSIS OF THE DYNAMICS OF THE LANDSCAPE IN THE HYDROGRAPHIC BASIN OF THE TOCANTINZINHO RIVER – GOIÁS

Abstract

The historical process of deforestation of the cerrado in the last century was directed to the northern region of the biome, which concentrated the largest vegetation fragments, protected areas and priority areas for biodiversity conservation. This anthropic pressure demands studies that assess the structural configuration of the fragmentation process around protected areas. The Tocantinzinho River basin fits into this scenario and was selected to assess changes in the landscape structure considering historical data on land cover and use, to identify space-time patterns that may influence the functioning of the landscape. Satellite images (LANDSAT) were classified between 1985 and 2016, with the application of landscape descriptive indexes, which allowed spatial comparison in historical succession for the basin area. The results indicate that the replacement of patches of native vegetation by anthropic patches mainly impacted the grassy field vegetation and that the process of anthropization of the area is recent with evidence of development from the 2000s; ensure that the pastures are already being replaced by agriculture and that the fragmentation process has affected the size and connectivity of vegetation formations, which can directly affect the protected areas located in and around the river basin.