Vol. 12 (2022)

Sarah Matheis-Kist
Hildesheim: Universitätsverlag Hildesheim, 2022. - 263 p.
Zugl. Hildesheim, Univ., Diss., 2022

DOI 10.18442/207

ISBN 978-3-96424-063-7

The majority of preserved fens in Germany are showing changed hydrological conditions, a fen-untypical inventory of species and a heavily degraded peat body. Revitalization measures are being implemented to improve the state of the severely degraded fen ecosystems. Until now there is no existing concept for success control that can be specifically applied to the rating of revitalization measures in severely degraded fen ecosystems.
For the case study of the severely degraded fen with varied changes in hydrological conditions Bergen-Weißacker Moor (South of Brandenburg), success control was implemented for an observation period of two years to evaluate the effect of a rewetting measure. The foundation of the success control consists of a set of biotic and abiotic parameters. In order to build a fundamental understanding of the ecosystem, the set of parameters is larger than the area influenced by the measure. For the classification of recorded results, a basis for the evaluation is established.
The recorded findings in the Bergen-Weißacker Moor show that even after rewetting the area influenced by the measure, no stable near surface water tables are present. Based upon the findings, further boundaries and potentials as well as additional suggestions for further modification of the concept are being formed. Furthermore, considerations for the transferability are being established. This proves that specific requirements have to be present in order to implement the concept with little adaptions in other severely degraded minerotrophic mires. Concluding, the monitoring results are used to formulate recommendations as an action plan to improve the conditions of fens prospectively.
Under the framework of the present report the obtained findings are being used to define principles for success controls in severely degraded fen ecosystems. This includes for example the inclusion for fen internal areas, the recording of side effects and long-term monitoring.