( ( From ( a ( global standpoint ) ) ) ( , ( ( forest fragmentation ) ( ( has ( ( been repeatedly ) ( ( ( ( cited ( as ( the ( ( most destructive ) ( human impact ) ) ) ) ) ( to ( forest ecosystems ) ) ) , ) ( responsible ( for ( ( the extinction ) ( of ( ( more species ) ( than ( any ( other factor ) ) ) ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN From) (NP (DT a) (JJ global) (NN standpoint))) (, ,) (NP (NN forest) (NN fragmentation)) (VP (VBZ has) (VP (VBN been) (ADVP (RB repeatedly)) (VP (VBN cited) (PP (IN as) (NP (DT the) (ADJP (RBS most) (JJ destructive)) (JJ human) (NN impact))) (PP (TO to) (NP (NN forest) (NNS ecosystems))) (, ,) (ADJP (JJ responsible) (PP (IN for) (NP (NP (DT the) (NN extinction)) (PP (IN of) (NP (NP (JJR more) (NNS species)) (PP (IN than) (NP (DT any) (JJ other) (NN factor))))))))))) (. .)))
From a global standpoint, forest fragmentation has been repeatedly cited as the most destructive human impact to forest ecosystems, responsible for the extinction of more species than any other factor.
(ROOT (S (NP (NNP Human) (NNS actions)) (VP (VBZ is) (ADJP (JJ responsible) (PP (IN for) (NP (NP (DT the) (NN extinction)) (PP (IN of) (NP (NP (NNS hundreds)) (PP (IN of) (NP (NP (NNS species)) (PP (IN of) (NP (NNS birds))))))))))) (. .)))