Inventories for the Alkaline Fen and Transition Mire and Quaking Bog Annex 1 habitats in England

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A list of known locations of vegetation types which can be categorised as AF or TMQB was generated using existing national and local datasets from Natural England and partner organisations, in conjunction with additional information held at Sheffield. Existing datasets and site knowledge were used together with aerial photography to compile GIS boundaries of stands or vegetation mosaics supporting target vegetation types. Where possible, the existing Natural England National Fen Inventory GIS polygons were reviewed and refined, and where qualifying vegetation occurs but does not coincide with existing National Fen Inventory polygons, new polygons have been digitised. The polygons have been captured as a stand-alone GIS layer. The attributes attached to each polygon include NVC type and notes relating to the vegetation (where information exists), as well as information about relevant meta-data. In addition, point data have been captured where grid references were available but where there was not enough additional information to delimit vegetation stand boundaries. There are several other additional categories included in the Annex 1 Habitat dataset; “Mollinia Meadows”, “Petrifying springs with tufa formation” & “Calcareous fen with Cladium”, these are not comprehensive categories and are mapped as a result of the other Annex 1 types. Several Annex 1 habitats categories have also been sub-categorised into “former”, “remnant” and “degraded” habitats. The category “Not assigned to Annex 1 habitat” are wetland habitats, but not of Annex 1 habitat quality.