( ( ( ( Scientists ( believe ( that ( ( acidic water ) ( ( ( dissolves ( ( the ( ( ( nutrients and ) helpful ) minerals ) ) ( in ( the soil ) ) ) ) and ) ( then ( ( ( washes them ) away ) ( before ( the trees ) ) ) ) ) ) ) ) ) and ) ( ( other plants ) ( can ( use ( them ( to grow ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNS Scientists)) (VP (VBP believe) (SBAR (IN that) (S (NP (JJ acidic) (NN water)) (VP (VP (VBZ dissolves) (NP (NP (DT the) (ADJP (JJ nutrients) (CC and) (JJ helpful)) (NNS minerals)) (PP (IN in) (NP (DT the) (NN soil))))) (CC and) (VP (ADVP (RB then)) (VBZ washes) (NP (PRP them)) (ADVP (RB away)) (PP (IN before) (NP (DT the) (NNS trees))))))))) (CC and) (S (NP (JJ other) (NNS plants)) (VP (MD can) (VP (VB use) (S (NP (PRP them)) (VP (TO to) (VP (VB grow))))))) (. .)))
Scientists believe     that acidic water dissolves the nutrients and helpful minerals     in the soil and then washes them away before the trees and other     plants can use them to grow.
(ROOT (S (PP (IN In) (NP (DT a) (NN forest))) (, ,) (NP (NNS decomposers)) (VP (VBP help) (SBAR (S (NP (JJ other) (NNS organisms)) (VP (VBP survive) (SBAR (S (PP (IN because) (NP (PRP they))) (NP (PRP they)) (VP (VBD put) (NP (NNS nutrients)) (PP (IN into) (NP (DT the) (NN soil))) (SBAR (IN that) (S (NP (NNS plants)) (VP (VBP use) (S (VP (TO to) (VP (VB grow)))))))))))))) (. .)))
In a forest, decomposers help other organisms survive because they they put nutrients into the soil that plants use to grow.