( ( Ecological succession ) ( ( ( ( ( can ( be ( understood ( as ( ( a process ) ( of ( ( changing ( species composition ) ) ( within ( ( a community ) ( due ( to ( an ( ecological disturbance ) ) ) ) ) ) ) ) ) ) ) ) ) , ) and ) ( ( varies largely ) ( according ( to ( ( the ( initial disturbance ) ) ( prompting ( the succession ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Ecological) (NN succession)) (VP (VP (MD can) (VP (VB be) (VP (VBN understood) (PP (IN as) (NP (NP (DT a) (NN process)) (PP (IN of) (S (VP (VBG changing) (NP (NN species) (NN composition)) (PP (IN within) (NP (NP (DT a) (NN community)) (ADJP (JJ due) (PP (TO to) (NP (DT an) (JJ ecological) (NN disturbance)))))))))))))) (, ,) (CC and) (VP (VBZ varies) (ADVP (RB largely)) (PP (VBG according) (PP (TO to) (NP (NP (DT the) (JJ initial) (NN disturbance)) (VP (VBG prompting) (NP (DT the) (NN succession)))))))) (. .)))
Ecological succession can be understood as a process of changing species composition within a community due to an ecological disturbance, and varies largely according to the initial disturbance prompting the succession.
(ROOT (S (NP (DT The) (NN term) (JJ ecological) (NN succession)) (VP (VBZ refers) (PP (TO to) (NP (NP (DT the) (NN sequence)) (PP (IN of) (NP (NN community) (CC and) (NN ecosystem) (NNS changes))))) (PP (IN after) (NP (DT a) (NN disturbance)))) (. .)))