The Lysina CZO is an experimental catchment to study the resilience of soil functions to acid deposition and other impacts in heavily managed forest land used for timber production. It represents managed land as an important economic asset where soil is under threat from industrial pollution. Situated in the Protected Area Slavkov Forest, 120 km W from Prague, 10 km N from Marienbad. The main focus is on description of long-term hydrobiogeochemical patterns in the magnesium-poor and acid-sensitive Lysina catchment. Individual tasks: study of element fluxes and pools, wet and dry deposition, internal recycling in trees, soil exchange processes, chemical weathering, nutritional status of trees and toxic metals speciations, modeling predictions of hydrologic, hydrochemical and soil chemical status. Research at Lysina started in 1988. Lysina is a member of the Czech network GEOMON and the three following international networks: ICP-Integrated Monitoring, ICP-Waters, ILTER One paired catchment (satellite site in the vicinity) was selected in 1991 as the second end-members of Norway spruce ecosystem sensitivity to acidic atmospheric deposition: acid resistant Pluhuv Bor underlain by ultramafic magnesium-rich serpentine.