The Role of Private Rural Properties for Conserving Native Vegetation in Brazilian Southern Amazonia

The State of Mato Grosso in Brazil has undergone intensive land use changes over the past decades. Native ecosystems have been converted into agrosystems for the production of cash crops and cattle. The Brazilian Forest Code advocates full protection of specifically sensitive habitats, and it also safeguards a fixed percentage of native vegetation known as “Legal Reserves” (LRs) inside private rural properties. As part of Brazilian Legal Amazonia region, in Mato Grosso, these percentages account for 35 % of savannas and 80 % of forests found inside each rural property. Here we analyze at the scale of the three biomes: Cerrado, Amazonia and Pantanal, the changes in native vegetation cover (NVC) from 1992 to 2007 and the representativeness of NVC types within the LRs, as well as the role of LRs for general landscape configuration and conservation. In Mato Grosso, 90 % of all studied NVC types are represented inside LR patches. Legal Reserves also accounted for 37 % of the total protected areas and for 37.8 % of all remnant NVCs found in Mato Grosso in 2007. The importance of LRs for landscape structure varied greatly according to biome, but it is noteworthy that LRs were generally missing in highly deforested zones. The relative small size of LRs in all biomes (55 to 64 % of them are ≤12 ha) makes them specifically vulnerable to further changes in land use. Considering the current tendency of ongoing fragmentation, the importance of LRs for landscape connectivity should be increased, specifically by improving the network of corridors between these remnant native vegetation areas.