Las Tablas de Daimiel National Park has suffered too many modifications throughout its history, natural as well as anthropic, which have affected the carbon storage in different ways. The study of those variations has been carried out by the analysis of sedimentary record and historical data. The sedimentary record has been studied from the core Ciguela 4. It was sampled with a systematic high resolution method (0.7 cm thickness average) to analyze geochemistry and pollen. The analysis of all data shows that the natural changes (linked with the climate) have more variation ranges than the anthropic ones, are directly related with the climate and not with the concentration of the atmospheric CO2, showing a natural cyclicity with a fast mitigation (decades) of the variations. In the other hand the anthropogenic impacts depend on the proximity and intensity of the impact. The usage changes produced during the second half of the 19th century were an indirect impact with medium intensity. The environment had the capacity to recover the values of a normal storage in less than 50 years. Nevertheless the dissication and overexploitation of the groundwater (second half of 20th century) were direct and high intensity impacts. These impacts caused a fast loss of the water table and the salinization of the environment. Due to that the ecosystem lost capacity to store C. recovery of the normal values by a natural way is difficult now.
