Grundsatze und modelle der Moorrenaturierung in Suddeutschland

Translated title of the contribution: Principles and models of mire restoration in southern Germany

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Abstract

About 90% of fens and 50% of rain-bogs are worth to be restored in southern Germany, because they don't fullfill sufficiently the function of ecolocically intact mires, e. g. sinks for solid materials and nutrients, retention of surplus waters, living space for plant and animal species adapted to wet and sometimes nutrient poor site conditions. The primary goal of restoration has to be peat growth. Therefore, in strongly degraded fens rewetting measures have to be planned in a way that the fen area is flooded by water over the most part of the year. Pre-drained rain bogs require ditch closing; in industrially exploited bogs peat mining has to be finished by excavating beneath the mire water level so that peat holes remain like in former hand cutting areas. Sowing and/or planting of pioneer phanerogams and mosses like Carex rostrata or green Sphagna accelerate the vegetation development; these processes can slightly be promoted by a PK-fertilization. Total rewetting leads to high productive reeds of Typha, Phragmites or tall sedges if the fen soils were loaded by phosphorous due to previous intensiv agricultural use. In this case, such areas can serve as cleaning systems for polluted waters and become sinks again. The phytomass could possibly be used for industrial use. Fens not suitable for total rewetting are suggested to be developed for moist grassland rich in species. For this goal, a combination of impoverishment and introducing the desired plant species is recommended. To stabilize these new created vegetation systems extensive forms of grassland pasturing have to be installed.

Translated title of the contributionPrinciples and models of mire restoration in southern Germany
Original languageGerman
Pages (from-to)251-272
Number of pages22
JournalTelma
Issue number28
StatePublished - 1998

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