( ( ( ( ( ( The organism ) ( lies ( in ( ( the ( sediment layer ) ) ( ( waiting ( for ( ( ( a storm ) or ) ( other disturbance ) ) ) ) ( to ( ( bring ( nitrate-rich water ) ) ( into ( its area ) ) ) ) ) ) ) ) ) , ) and ) ( then ( uses ( the ( large ( vacuole ( to ( ( ( store away ) ( the nitrates ) ) ( that ( it needs ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (DT The) (NN organism)) (VP (VBZ lies) (PP (IN in) (NP (NP (DT the) (JJ sediment) (NN layer)) (VP (VBG waiting) (PP (IN for) (NP (NP (DT a) (NN storm)) (CC or) (NP (JJ other) (NN disturbance)))) (S (VP (TO to) (VP (VB bring) (NP (JJ nitrate-rich) (NN water)) (PP (IN into) (NP (PRP$ its) (NN area))))))))))) (, ,) (CC and) (S (NP (RB then)) (VP (VBZ uses) (NP (DT the) (JJ large) (NN vacuole) (S (VP (TO to) (VP (VB store) (PRT (RP away)) (NP (DT the) (NNS nitrates)) (SBAR (IN that) (S (NP (PRP it)) (VP (VBZ needs)))))))))) (. .)))
The organism lies in the sediment layer waiting for a storm or other disturbance to bring nitrate-rich water into its area, and then uses the large vacuole to store away the nitrates that it needs.
(ROOT (NP (DT The) (JJ large) (JJ central) (NN vacuole) (NN store) (NN water) (. .)))