The Gran Chaco Pathways Towards a Sustainable Future 2025

The Gran Chaco’s ecological diversity is reflected in its four main zones (see Map 3), each with distinct climatic and biological characteristics: 1 Humid and sub-humid Chaco Located in the east, this zone receives 750-1,300 mm of annual precipitation. This subregion harbours greater biological diversity, with a mosaic of forests, savannas and wetland areas. It includes parts of Argentina, Bolivia and Paraguay.3 Arid Chaco This area, in the south-west, is the driest, with annual precipitation ranging from 300-500 mm. It features xerophytic forests and harsh conditions for vegetation. It includes parts of Argentina. 2 Semi-arid Chaco This zone encompasses the west of Paraguay and much of Argentina and Bolivia, with annual precipitation ranging from 500-700 mm. It is characterized by forests adapted to drought and extreme temperatures. 4 Serrano Chaco Extending over the sub-Andean and Pampas hills, this zone has a more humid climate with annual precipitation between 450 and 900 mm. It is home to subtropical species and high- altitude grasslands.10 It includes parts of Argentina and Bolivia. Ecozones in the Gran Chaco MAP 3 Source: Maldonado, P ., Hohne, E. & Naumann, M. (2006).11 The Gran Chaco: Pathways Towards a Sustainable Future 11