( ( Ecological succession ) ( , ( ( is ( ( the ( ( phenomenon or ) process ) ) ( ( by which ) ( ( an ( ecological community ) ) ( ( undergoes ( ( ( more or ) less ) ( ( ( orderly and ) predictable ) changes ) ) ) ( following ( ( disturbance ( or ( initial colonization ) ) ) ( of ( new habitat ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NNP Ecological) (NN succession)) (, ,) (VP (VBZ is) (NP (NP (DT the) (NN phenomenon) (CC or) (NN process)) (SBAR (WHPP (IN by) (WHNP (WDT which))) (S (NP (DT an) (JJ ecological) (NN community)) (VP (VBZ undergoes) (NP (ADJP (JJR more) (CC or) (JJR less)) (ADJP (JJ orderly) (CC and) (JJ predictable)) (NNS changes)) (PP (VBG following) (NP (NP (NN disturbance) (CC or) (JJ initial) (NN colonization)) (PP (IN of) (NP (JJ new) (NN habitat)))))))))) (. .)))
Ecological succession, is the phenomenon or process by which an ecological community undergoes more or less orderly and predictable changes following disturbance or initial colonization of new habitat.
(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)))) (. .)))