( Wolves ( ( would ( ( ( play ( a ( beneficial ( ecological role ) ) ) ) , ) ( ( sending ( useful ( ( ripples and ) waves ) ) ) ( throughout ( ( the ( ecosystem 's ) ) ( food chain ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Wolves)) (VP (MD would) (VP (VB play) (NP (DT a) (JJ beneficial) (JJ ecological) (NN role)) (, ,) (S (VP (VBG sending) (NP (JJ useful) (NNS ripples) (CC and) (NNS waves)) (PP (IN throughout) (NP (NP (DT the) (NN ecosystem) (POS 's)) (NN food) (NN chain))))))) (. .)))
Wolves would play a beneficial ecological role, sending useful ripples and waves throughout the ecosystem's food chain.
(ROOT (S (NP (NNP Beneficial) (NNS fungi)) (VP (VBP play) (NP (NP (DT a) (JJ crucial) (NN role)) (PP (IN in) (NP (NP (NN balance)) (PP (IN of) (NP (NNS ecosystems))))))) (. .)))
Beneficial fungi play a crucial role in balance of ecosystems.