Edaphic and geomorphic evidences of water level fluctuations in Gallocanta Lake, NE Spain

摘要: The pedological implications of lake water level fluctuations are complex, especially in margin, where topographical, hydrological, and sedimentary conditions most variable. Lake generate landscape elements, which provide insights into the processes involved soil development extent zones affected by flooding/desiccation. Coupling information from detailed geomorphological inspections field, mapping lakeshore, pedogenesis each element can a better understanding these relationships, was used to study saline Gallocanta Lake, NE Spain, semiarid intramontane lacustrine system that undergoes significant rapid fluctuations. Geomorphic classification margin forms environments served as guide for sampling. survey revealed high diversity contrast environment, shores coastal erosion characterized progradation/aggradation. Two toposequences 11 pedons were on different geomorphic units studied two margins lake. Following gradients elevation, moisture, salinity, soils showed succession Inceptisols Aridisols, with Mollisols developed at intermediate positions Aquic floor southern shore. Soils had sandy, loamy texture predominantly carbonatic composition, variation CCE (mean = 37%), texture, coarse fragments throughout profiles. Soil salinity highest lowest topographic position upper horizons, mean ECe 188.6 dS m− 1 25 °C. In addition, organic matter (6%) gypsum (34%) content occurred floor. color characteristics concentrations, depletions Fe Mn indicated redox changes associated saturation under carbonate or conditions. Macro micromorphological features oxidized reduced horizons alternation between palustrine (reduced) non-palustrine (detrital, emerged, oxidized) events positions, up 7 m above it. Pedogenesis inferred littoral/submerged located permanently emerged areas confirmed past present trend towards desiccation This has improved our how form develop within context units, be making land-use decisions protected reserve agricultural surroundings