River Wensum

Site details

UK map showing location of River Wensum Special Area of Conservation/Site of Community Importance.
Location of River Wensum SAC/SCI/cSAC
 

Note:

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

3260 Water courses of plain to montane levels with the Ranunculion fluitantis and Callitricho-Batrachion vegetation
The Wensum represents sub-type 1 in lowland eastern England. Although the river is extensively regulated by weirs, Ranunculus vegetation occurs sporadically throughout much of the riverís length. Stream water-crowfoot R. penicillatus ssp. pseudofluitans is the dominant Ranunculus species but thread-leaved water-crowfoot R. trichophyllus and fan-leaved water-crowfoot R. circinatus also occur.

Annex I habitats present as a qualifying feature, but not a primary reason for selection of this site

Not applicable.

Annex II species that are a primary reason for selection of this site

1092 White-clawed (or Atlantic stream) crayfish  Austropotamobius pallipes
The Wensum is a chalk-fed river in eastern England, and is an eastern example of riverine white-clawed crayfish Austropotamobius pallipes populations. As with most of the remaining crayfish populations in the south and east of England, the threats from non-native crayfish species and crayfish plague are severe. Designation of the river as a SAC provides as much protection as can be afforded to such vulnerable populations.

Annex II species present as a qualifying feature, but not a primary reason for site selection

1016 Desmoulin`s whorl snail  Vertigo moulinsiana
1096 Brook lamprey  Lampetra planeri
1163 Bullhead  Cottus gobio

Many designated sites are on private land: the listing of a site in these pages does not imply any right of public access.


 
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