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
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.