Global map of salt-affected soils
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Naturally saline or sodic soils host valuable ecosystems, including a range of rare plants, that are adapted to extreme conditions. However, salt-affected soils may develop quickly in response to human activities. Soils may thus become affected by salinity and sodicity due to inappropriate management or through saline water intrusion from sea, river, or groundwater and undergo a rapid decline of health, losing their capacity for biomass production, natural filtration, carbon sequestration, and other necessary ecosystem functions. The Global map of salt-affected soils (GSASmap) is an important tool for identifying salt-affected soils where sustainable soil management practices should be adopted to halt salinization and a foundation for launching a monitoring framework to track soil salinization and sodification and move into early detection and management.