Guianan savanna Guianan savanna The Guianan savanna (NT0707) is an ecoregion in the south of Venezuela, Guyana and Suriname and the north of Brazil. It is in the Amazon biome. The savanna covers an area of rolling upland plains on the Guiana Shield between the Amazon and Orinoco basins. It includes forested areas, but these are shrinking steadily due to the effect of frequent fires, either accidental or deliberate. The ecoregion includes the Gran Sabana region of Venezuela. The ecoregion includes three large unconnected areas totaling . The main section is in southeast Venezuela, the Brazilian state of Roraima and western Guyana.
Iwokrama Forest degrees west longitude. The Iwokrama Forest is bordered to the west by the Pakaraima Mountains and to the east by the isolated highlands scattered through central-east Guyana, Suriname and French Guiana. It is also bordered by savannahs in the southwest and northeast of Guyana and southwestern Suriname. The Essequibo River forms the eastern boundary. The northern boundary is the Siparuni River. The Burro-Burro River runs through the centre, and most of its watershed is within the Forest. The area is covered with lowland tropical forest, and dominated by tall tropical trees with a dense canopy 20 to 30 metres (70