( Ecosystem ( ( ( ecologists ( view ecosystems ) ) ( as ( ( ( transformers ( of energy ) ) and ) ( processors ( of matter ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Ecosystem)) (VP (VBZ ecologists) (NP (NN view) (NNS ecosystems)) (PP (IN as) (NP (NP (NP (NNS transformers)) (PP (IN of) (NP (NN energy)))) (CC and) (NP (NP (NNS processors)) (PP (IN of) (NP (NN matter))))))) (. .)))
Ecosystem ecologists view ecosystems as transformers of energy and processors of matter.
(ROOT (S (PP (IN Unlike) (NP (NN energy))) (, ,) (NP (NN matter)) (VP (VBZ does) (RB n't) (VP (VB need) (S (VP (TO to) (VP (VB be) (VP (ADVP (RB constantly)) (VBN added) (PP (TO to) (NP (NNS ecosystems))))))) (SBAR (IN because) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN recycled) (PP (IN through) (NP (NNS ecosystems))))))))) (. .)))