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Concept: Boreal mud-bottom communities in the eunishabitats vocabulary

Concept URI http://eunis.eea.europa.eu/eunishabitats/D2.3H2
Preferred label Boreal mud-bottom communities
Definition Sparse, bryophyte-poor, sedge and rush communities of bare, extremely wet peat muds of boreal Palaearctic mires, frequently inundated, remaining wet for a prolonged part of dry periods. The elastic substrate expands and raises when saturated, shrinks in dry periods, forming polygonal networks of surface cracks; there is no peat formation. Mud-bottom communities comprise the same vascular plants as transition mires of unit 54.5, such as [Carex limosa], [Carex chordorrhiza], [Carex rariflora], [Carex rostrata], [Equisetum fluviatile], [Eriophorum angustifolium], [Eriophorum gracile], [Eriophorum russeolum], but they are more dispersed. [Juncus stygius] and [Utricularia intermedia] are, however, characteristic. Bryophytes are absent or scattered, although the small hepatics [Cladopodiella fluitans] and [Gymnocolea inflata] are sometimes abundant; a well-developed surface film is formed by microalgae, including filamentous algae such as [Zygogonium erieetorum], and numerous desmids and diatoms in fen mud-bottoms. In situations of ochre formation, iron bacteria are abundant. Mud-bottom communities occur in acidic fens of unit 54.4, in rich fens of unit 54.2, in bog hollows of unit 51, and, mostly, in flarks or rimpis of aapa mires of unit 54.8 and palsa mires of unit 54.9.
Notation D2.3H2
Status Valid
Status Modified 2014-01-31
Accepted Date 2014-01-31
Not Accepted Date
Has broader
Has exact match