▁ ▁It ▁is ▁on ▁the ▁west ▁side ▁of ▁the ▁Se vern ▁to ▁Se vern ▁Ham , ▁T ew kes bury ▁S SS I . ▁ ▁Location ▁The ▁Se vern ▁at ▁this ▁site ▁is ▁an ▁old ▁me ander ▁which ▁was ▁cut ▁off ▁from ▁the ▁main ▁flow ▁of ▁the ▁river ▁when ▁Upper ▁L ode ▁lock ▁was ▁built . ▁ ▁It ▁is ▁a ▁relatively ▁quiet ▁back water ▁that ▁joins ▁the ▁Se vern ▁at ▁the ▁south ▁end . ▁ ▁Hab itat ▁and ▁fl ora ▁The ▁me ander ▁now ▁supports ▁a ▁diverse ▁range ▁of ▁habit ats ▁as ▁a ▁result ▁of ▁the ▁se clusion . ▁ ▁These ▁in ▁turn ▁support ▁a ▁variety ▁of ▁plant ▁life ▁and ▁there ▁are ▁at ▁least ▁six ▁nation ally ▁rare ▁species . ▁The ▁channel ▁has ▁s ilt ed ▁up ▁at ▁the ▁fur th est ▁part ▁from ▁the ▁main ▁river . ▁ ▁Where ▁spo il ▁has ▁been ▁dump ed ▁histor ically ▁in ▁the ▁channel ▁the ▁area ▁has ▁become ▁rough ▁grass land . ▁ ▁Hab itats ▁are ▁open ▁water , ▁marg inal ▁mud , ▁in land ▁salt mar sh , ▁will ow ▁car r , ▁neutral ▁grass land , ▁scr ub ▁and ▁wood land . ▁ ▁The ▁main ▁river ▁controls ▁the ▁level ▁of ▁the ▁water ▁which ▁fl uct u ates ▁as ▁the ▁Se vern ▁is ▁a ▁tid al ▁river . ▁ ▁Aqu art ic ▁plants ▁supported ▁are ▁p ond we ed , ▁flow ering ▁r ush , ▁water ▁forget - me - not , ▁water - c ress ▁and ▁water ▁dock . ▁There ▁is ▁white ▁will ow