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Bundesamt für Naturschutz

* Active raised bogs

Natural or near-natural, largely ombrotrophic raised bog complexes on peaty substrates. An elevated surface, or dome, often develops, with its own water level which is well over the groundwater level of the surroundings. The raised bog complex includes all areas lying inside of the lagg zone with their sub-habitats, e.g. hummocks, hollows, lagg. Areas containing individual trees or dispersed scrub, e.g. of Pinus mugo montana or Pinus mugo var. mughus, may be present on the peatland. High precipitation is a precondition for / allows for peat formation (active bog).

Natura 2000-Code

Notes on habitat mapping

The essential precondition for identification as a raised bog complex is the presence of an intact raised bog core with its typical structure and typical vegetation. If this core is transitional to a fen, the bog complex should be considered under transitionn mires and quaking bogs) (habitat type 7140). Especially in the more continental regions with their lower rainfall the transitions between ombrotrophic raised bogs and the minerotrophic transition mires may be seamless and differentiation may be difficult.

The delimitation is to include all the sub-habitats that are part of this complex. If possible the delimited site should be a hydrological and edaphic unit: the outer boundary of this habitat is the lagg zone. For the purposes of notifying the site for Natura 2000 the site should further include adjacent areas of fen and transition mires (i.a. 7230) with the entire coherent peat mass.

It is difficult to distinguish between this type and degraded raised bogs still capable of natural regeneration ( (7120). The latter should include all raised bogs which have suffered obvious damage in their core area, e.g. through partial peat extraction. Bogs which contain a more or less intact raised bog core hosting typical vegetation, but which have suffered damage to other parts of the complex should (as yet) be considered under active raised bogs (7110). Bog woodlands and woodlands of peatland margins outside of the lagg zone should be considered under type 91D0. Soaks, bog pools and bog lakes (larger dystrophic pools and lakes) should, according to the EU, be considered separately under type 3160. This is also true for vegetation of the Rhynchosporion (7150).

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