Abstract
Las Tablas de Daimiel National Park has experienced many hydrological and ecological modifications through out its history, both of natural as well as anthropogenic origin, which have affected its carbon storage capacity and carbon fluxes. The study of those variations has been carried out by the analysis of its sedimentary record (geochemistry and pollen) and historical data. The natural changes have a wider variation range than the anthropogenic ones, showrepetitive patterns and the system reacts readjusting the equilibrium among its components. Anthropogenic effects depend on the direct or indirect impact on the wetlands of change and its intensity. In addition, the anthropogenic impacts have the capacity of breaking the natural balance of the ecosystem and the internal interactions.
Highlights
A B STRACT Las Tablas de Daimie1 National Park has experienced many hydrological and ecological modifications through out its history, both of natural as well as anthropogenic origin, which have affected its caIDon storage capacity and caIDon fluxes
Our main goal in this paper is to present and compare the evolution of C storage in a Mediterranean temperate wetland in resJXlnse to the modifications that led to the change from 5 km to'\'>'
The comparison of changes during 'natural' and 'anthroJXlgenic' periods allows the characterization of changes in C storage in the environment
Summary
AMS 14C dating of samples (four samples) was made at the GADAM Centre (Gliwice, Poland) and 239,240pU (16 sam ples) and 2lOpo (20 samples) at the Centro de Investigaciones. The 210Pb profile confirmed that there was no evident mixing of sediment or hiatuses in the up per part of the core, which coincides with the visual inspection (Fig. 3a). With all these data, an age-depth model was constructed by linear interpolation of ages between dated samples. The age model was tested against documented local events (documentary data for the last millennium, Table 3) likely to have been recorded in the sediments In this sense, we consider a documentary event recorded in the sediments, when an anoma lous, sudden or local disruption in the trends or relations among the geochernical or :[X)llen components of the sediments ap pears, and the interpretation of this 'rupture' is consistent with the effects of a documented event in a chronological :[X)sition near the interpolated age of the geochemical/pollen anomaly. 0.184 cm yc sedimentation rate for the last 100 yr
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