Temporary ponds on calcareous hills surrounding the town of Jena (Thuringia, Germany) were investigated for one year with regard to the dynamics of their physical and chemical characteristics. The present paper concerns selected data from a vertical, diurnal and seasonal sampling program including the major physical and chemical factors. The ponds were also investigated during the dry period in summer, and in winter when they are covered with ice. A description of the emergent vegetation is also given and used for a classification of the ponds. Most of the factors investigated show strong diurnal and seasonal trends and some,- despite all ponds being shallow - were vertically stratified. The measurements emphasize that in small ponds both seasonal and diurnal changes in water-chemistry, as well as changes in vertical gradients, are affected by the vegetation succession stage, and consequently by the temporary character of the ponds. Protection and management of these ponds often involves dredging and therefore the short time response of dredging is discussed.
Arle, J. (2002). Physical and chemical dynamics of temporary ponds on a calcareous plateau in Thuringia, Germany. Limnologica, 32(2), 83–101. https://doi.org/10.1016/S0075-9511(02)80001-9