Summary
The thickness of the bed sediment 5·70 m of the Mikolajki Lake (Central Mazur District) was measured at a depth of 18·5 m by means of a vertical core sampler.
In the samples taken from this profile the amount of sedimentary chlorophyll in relation to the dry mass of the sediment, the percentage of organic matter content and the absolute water content were determined.
From analyses of the amount of sedimentary chlorophyll and organic matter in the Mikolajki Lake sediment, two stages in the development of the lake during the post-glacial period were distinguished which in their general outline corresponded to the climatic changes described byBlytt andSernander. During the periods when the climate was cold and humid the proportion of sedimentary chlorophyll and organic matter was smaller than during the periods of dry and warm climatic conditions when the lakes frequently became, for example during the boreal period. In addition, the author suggests that two layers originating from the humid period and two layers from the dry periods may be distinguished in the upper part of the profile. The former two would seem to correspond to the subatlantic period, the two latter to the neoboreal period.
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Czeczuga, B. Quantitative changes in sedimentary chlorophyll in the bed sediment of the Mikolajki Lake during the post-glacial period. Schweiz. Z. Hydrologie 27, 88–98 (1965). https://doi.org/10.1007/BF02505394
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DOI: https://doi.org/10.1007/BF02505394