Biddle Street, Yatton
Biddle Street, Yatton is a 44.8 hectare biological Site of Special Scientific Interest near the village of Yatton in North Somerset, notified in 1994.
Management practices and the variation in the soils has resulted in the watercourses supporting a wide range of aquatic plant
communities. Where open water occurs plants such as Common Water-starwort ', European Frogbit ', Fan-leaved Water-crowfoot '. The calcareous influence of the
underlying Compton soils also encourages Whorled Water-milfoil ' and Stonewort '. Also present are the nationally scarce Rootless Duckweed ' and Hairlike Pondweed '.
A rich invertebrate fauna is also associated with the rhynes and ditches including aquatic beetles including populations of two
nationally rare species, Hydacticus transversalis and Britain's largest water beetle, the Great Silver Water Beetle '. A number of dragonflies and damselflies are also found in the watercourses including the nationally scarce Variable Damselfly '. Strong populations of the Common Freshwater Mussel occur as does the nationally rare Pea Mussel '.
