|
Nine Wells Local Nature Reserve is a small forest patch where multiple springs issue from the base of the chalk hill. These springs feed Hobson's Conduit, the watercourse that was built between 1610 and 1614 by Thomas Hobson and other benefactors to bring fresh water into the city of Cambridge, England.〔(Nine Wells Local Nature Reserve )〕〔(Nine Wells LNR Management Plan )〕 It is just south of Addenbrooke's Hospital (), near the village of Great Shelford. There are four main springheads linked by stream channels, and innumerable minor fissures, that issue water at a constant 10.2 °C. A survey determined that 108 plant species grow here and the area contains numerous mature beech and ash trees as well as spindle, blackthorn and hawthorn.〔(Nine Wells LNR Management Plan )〕 It was created a biological Site of Special Scientific Interest because a range of relic aquatic invertebrates bred here. The flatworms ''Planaria cornuta'' and ''P. alpina'' were found here and had survived from the last glacial period. Another relic species was a trichopteran (caddisfly), ''Agapetus fuscipes''. However the drought of 1976 together with increased water abstraction caused some extinctions and Nine Wells lost its SSSI status. Efforts are being made to recreate conditions favourable to re-establishing a richer invertebrate fauna again. Nine Wells was created a Local Nature Reserve in 2005 and is owned by the Cambridge City Council. References ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nine Wells」の詳細全文を読む スポンサード リンク
|