( ( ( ( ( This process ) , ) ( called ( ecological speciation ) ) ) , ) ( ( may ( ( be ( one ( of ( ( ( the easiest ) and ) ( fastest ways ) ) ) ) ) ( that ( ( new species ) arise ) ) ) ) . ) )
(ROOT (S (NP (NP (DT This) (NN process)) (, ,) (VP (VBN called) (NP (JJ ecological) (NN speciation))) (, ,)) (VP (MD may) (VP (VB be) (NP (NP (CD one)) (PP (IN of) (NP (NP (DT the) (JJS easiest)) (CC and) (NP (JJS fastest) (NNS ways))))) (SBAR (IN that) (S (NP (JJ new) (NNS species)) (VP (VBP arise)))))) (. .)))
This process, called ecological speciation, may be one of the easiest and fastest ways that new species arise.
(ROOT (S (NP (JJ Sympatric) (NN speciation)) (VP (VBZ is) (SBAR (WHADVP (WRB when)) (S (NP (DT a) (JJ new) (NN species)) (VP (VBZ arises) (PP (IN without) (NP (JJ geographic) (NN separation))))))) (. .)))