Biddle Street, Yatton
Encyclopedia
Biddle Street, Yatton is a 44.8 hectare
biological Site of Special Scientific Interest (SSSI) 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
(Callitriche stagnalis), European Frogbit
(Hydrocharis morsusranae), Fan-leaved Water-crowfoot (Ranunculus circinatus). The calcareous influence of the
underlying Compton soils also encourages Whorled Water-milfoil (Myriophyllum verticillatum) and Stonewort (Chara sp). Also present are the nationally scarce Rootless Duckweed (Wolffia arrhiza) and Hairlike Pondweed (Potamogeton trichoides).
A rich invertebrate fauna is also associated with the rhyne
s 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 (Hydrophilus piceus). A number of dragonflies and damselflies are also found in the watercourses including the nationally scarce Variable Damselfly
(Coenagrion pulchellum). Strong populations of the Common Freshwater Mussel occur as does the nationally rare Pea Mussel
(Pisidium pseudosphaerium).
Hectare
The hectare is a metric unit of area defined as 10,000 square metres , and primarily used in the measurement of land. In 1795, when the metric system was introduced, the are was defined as being 100 square metres and the hectare was thus 100 ares or 1/100 km2...
biological Site of Special Scientific Interest (SSSI) near the village of Yatton
Yatton
Yatton is a village and civil parish within the unitary authority of North Somerset, which falls within the ceremonial county of Somerset, England. It is located south-west of Bristol. Its population in 2001 was 9,176...
in North Somerset
North Somerset
North Somerset is a unitary authority in England. Its area covers part of the ceremonial county of Somerset but it is administered independently of the non-metropolitan county. Its administrative headquarters is in the town hall in Weston-super-Mare....
, 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
Callitriche stagnalis
Callitriche stagnalis is a species of aquatic plant known by the common name pond water starwort.It is native to Europe but it is present on other continents as an introduced species and sometimes a noxious weed of waterways. This is an annual herb rooting to the substrate in shallow water or in...
(Callitriche stagnalis), European Frogbit
Hydrocharis morsus-ranae
Hydrocharis morsus-ranae, Frogbit, is a flowering plant belonging to the genus Hydrocharis in the family Hydrocharitaceae. In North America, it is referred to as Common Frogbit or European Frogbit to distinguish it from the related American Frogbit .It is a small floating plant resembling a small...
(Hydrocharis morsusranae), Fan-leaved Water-crowfoot (Ranunculus circinatus). The calcareous influence of the
underlying Compton soils also encourages Whorled Water-milfoil (Myriophyllum verticillatum) and Stonewort (Chara sp). Also present are the nationally scarce Rootless Duckweed (Wolffia arrhiza) and Hairlike Pondweed (Potamogeton trichoides).
A rich invertebrate fauna is also associated with the rhyne
Rhyne
A rhyne , rhine/rhyne , or reen is a drainage ditch, or canal, used to turn areas of wetland at around sea level into useful pasture....
s 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 (Hydrophilus piceus). A number of dragonflies and damselflies are also found in the watercourses including the nationally scarce Variable Damselfly
Variable Damselfly
Coenagrion pulchellum, the Variable Damselfly or Variable Bluet, is a European damselfly. Despite its name, it is not the only blue damselfly prone to variable patterning....
(Coenagrion pulchellum). Strong populations of the Common Freshwater Mussel occur as does the nationally rare Pea Mussel
Pisidium pseudosphaerium
Pisidium pseudosphaerium is a species of freshwater bivalve from family Sphaeriidae.-Distribution:It's native distribution is central-European and western-European.* Czech Republic - in Bohemia, in Moravia, critically endangered...
(Pisidium pseudosphaerium).
See also
- Puxton MoorPuxton MoorPuxton Moor is a 31.07 hectare biological Site of Special Scientific Interest on the North Somerset Levels, near Puxton, North Somerset, notified in 1994...
and Tickenham, Nailsea and Kenn MoorsTickenham, Nailsea and Kenn Moors SSSITickenham, Nailsea and Kenn Moors SSSI is a 129.4 hectare biological Site of Special Scientific Interest between Tickenham, Nailsea and Kenn on the North Somerset Levels, notified in 1995....
, two other similar SSSIs on the North Somerset Levels.