Norfolk Valley Fens
When undertaking an appropriate assessment of impacts at a site, all features of European importance (both primary and non-primary) need to be considered.
Annex I habitats that are a primary reason for selection of this site
|7230 Alkaline fens|
|Norfolk Valley Fens is one of two sites selected in East Anglia, in eastern England, where the main concentration of lowland Alkaline fens occurs. This site comprises a series of valley-head spring-fed fens. Such spring-fed flush fens are very rare in the lowlands. Most of the vegetation at this site is of the small sedge fen type, mainly referable to M13 Schoenus nigricans – Juncus subnodulosus mire, but there are transitions to reedswamp and other fen and wet grassland types. The individual fens vary in their structure according to intensity of management and provide a wide range of variation. There is a rich flora associated with these fens, including species such as grass-of-Parnassus Parnassia palustris, common butterwort Pinguicula vulgaris, marsh helleborine Epipactis palustris and narrow-leaved marsh-orchid Dactylorhiza traunsteineri.|
Annex I habitats present as a qualifying feature, but not a primary reason for selection of this site
Annex II species that are a primary reason for selection of this site
|1014 Narrow-mouthed whorl snail Vertigo angustior|
|Norfolk Valley Fens represents narrow-mouthed whorl snail Vertigo angustior in East Anglia. At Flordon Common a strong population occurs in flushed grassland with yellow iris Iris pseudacorus maintained by light grazing.|
|1016 Desmoulin`s whorl snail Vertigo moulinsiana|
|Norfolk Valley Fens is one of several sites representing Desmoulin’s whorl snail Vertigo moulinsiana in East Anglia. Within Norfolk Valley Fens there are a number of marginal fens around pingos – pools that formed in hollows left when large blocks of ice melted at the end of the last Ice Age. These are very ancient wetlands and several support strong populations of V. moulinsiana as part of a rich assemblage of Red Data Book and Nationally Scarce species in standing water habitat.|
Annex II species present as a qualifying feature, but not a primary reason for site selection
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