Oligotrophic waters containing very few minerals of sandy plains (Littorelletalia uniflorae)
Oligotrophic base-poor to acidic waters with perennial submerse or amphibious vegetation at the margins (Littorelletalia uniflorae) on oligotrophic soils of lake and pond banks (sometimes on peaty soils) in the planar to submontane zones. This vegetation consists of one or more zones, dominated by different species depending on the water's depth.
The European Commission has clarified that - depending on the definition of the term 'natural' - this habitat type may be primary or secondary (e.g. ponds) if its occurrences are subject to (semi-)natural development.
Notes on habitat mapping
The criterion for the delimitation of this habitat type is the presence of vegetation of the Littorellion alliance in oligotrophic standing waters of the plains and the colline zone. As an exception the only known lake with Isoetes in the montane zone, the Feldsee in the Black Forest is included here. For the delimitation of this habitat type both the vegetation and oligotrophic conditions are essential.
The entire waterbody in which vegetation of the syntaxa given above has been recorded is to be included. Apart from the open water the amphibious zone with its reedbeds, tall herb fringe communities, and sedge swamps is to be included. Stands in non-environmental waters are excluded. This habitat type is distinguished from type 3130 by the presence of vegetation of the Littorellion alliance and by the lack of dwarf rush communities.
Comments
A shoreline margin of a width of 100 m should be included in the protection/management concept, and, if possible, also the entire watershed.
The differentiation from habitat type 3130 is not sufficiently clear in the European Commission's Interpretation Manual.