( ( These organisms ) ( ( ( ( play ( ( a ( crucial role ) ) ( in ( benthic ecosystems ) ) ) ) , ) ( ( ( forming ( essential ( food chains ) ) ) and ) ( participating ( in ( the ( nitrogen cycle ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT These) (NNS organisms)) (VP (VBP play) (NP (NP (DT a) (JJ crucial) (NN role)) (PP (IN in) (NP (JJ benthic) (NNS ecosystems)))) (, ,) (S (VP (VP (VBG forming) (NP (JJ essential) (NN food) (NNS chains))) (CC and) (VP (VBG participating) (PP (IN in) (NP (DT the) (NN nitrogen) (NN cycle))))))) (. .)))
These organisms play a crucial role in benthic ecosystems, forming essential food chains and participating in the nitrogen cycle.
(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.