▁water . ▁The ▁frequent ▁movement ▁of ▁water ▁can ▁lead ▁to ▁a ▁sc our ing ▁effect , ▁but ▁can ▁also ▁with ▁heavy ▁poll ution ▁show ▁a ▁t endency ▁toward ▁e ut roph ic ation . ▁Due ▁to ▁er os ion ▁of ▁cl iffs ▁and ▁sed iment ary ▁de position , ▁the ▁shape ▁of ▁the ▁bod den ▁coast s ▁remains ▁un stable . ▁Sud den ▁changes ▁have ▁been ▁caused ▁by ▁storm f lo ods , ▁which ▁repeatedly ▁closed ▁connections ▁to ▁the ▁sea ▁or ▁opened ▁new ▁ones ▁in ▁the ▁past . ▁ ▁Bod den - type ▁b ays ▁can ▁be ▁found ▁in ▁Me ck len burg , ▁and ▁in ▁Den mark , ▁where ▁they ▁are ▁called ▁Nor ▁( da ). ▁However , ▁the ▁most ▁typical ▁bod den ▁are ▁located ▁off ▁the ▁P omer an ian ▁main land ▁between ▁the ▁mouth ▁of ▁the ▁Re ck nitz ▁river ▁and ▁the ▁island ▁of ▁U sed om . ▁Several ▁adjacent ▁bod den ▁between ▁the ▁F isch land - D ar ß - Z ing st ▁pen ins ula , ▁H idden see , ▁the ▁northern ▁and ▁western ▁pen ins ula e ▁of ▁R ü gen ▁and ▁the ▁P omer an ian ▁main land ▁are ▁grouped ▁as ▁Bod den ▁ch ains ▁( B od den ket ten ): ▁ ▁Dar ss - Z ing st ▁Bod den ▁Ch ain ▁( D ar ß - Z ing ster ▁Bod den k ette ), ▁consisting ▁of ▁( from ▁west ▁to ▁east ) ▁ ▁Sa aler ▁Bod den ▁with ▁Rib n itzer ▁See ▁and