( ( ( Fresh or ) ( Salt water ) ) ( use . ) )
(ROOT (S (NP (NP (NNP Fresh)) (CC or) (NP (NNP Salt) (NN water))) (VP (VBP use)) (. .)))
Fresh or Salt water use.
(ROOT (S (NP (JJ Fresh) (NN water) (NNS biomes)) (VP (VBP are) (VP (VBN defined) (PP (IN by) (NP (JJ low) (NN salt) (NN concentration))))) (. .)))