Volume 21 (2002)
Reconstruction of the trophic development of Lake
Krakower Obersee (Mecklenburg, Germany) by means of sediment-diatom-
and pollen-analysis
Thomas Hübener, Walter Dörfler
Changes
in composition of diatom (Bacillariophyceae) communities and pollen
content were analyzed in two cores from the lake Krakower See,
Mecklenburg-Vorpommern, Northern Germany. Based on the pollen
stratigraphy, a time-depth-curve was built that allowed an estimate of
the rate of sedimentation. The pollen curves, especially those of
settlement indicators, showed the human influence in the surrounding
area. Diatom assemblages clearly indicated that human activities had
influenced not only the terrestrial vegetation but also the water body
of the lake and it's trophic conditions. From a natural oligo- to
mesotrophic lake that had small oscillations in prehistoric times it
switched relatively fast into an eutrophic one around 700 years ago.
This radical change in the trophic status was an effect of both damming
up for mills in the 13th century and increasing settlement activities
around the lake.
| Editor-in-Chief: | Tomasz Goslar |
| Co-Editors: | Małgorzata Latałowa Wojciech Stankowski Krystyna Szeroczyńska |
| Secretary |
Mariusz Lamentowicz |