( ( Identify ( ( the ( ( most serious ) threats ) ) ( to ( ( the survival ) ( of ( species ( of concern ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Identify) (NP (NP (DT the) (ADJP (RBS most) (JJ serious)) (NNS threats)) (PP (TO to) (NP (NP (DT the) (NN survival)) (PP (IN of) (NP (NP (NNS species)) (PP (IN of) (NP (NN concern))))))))) (. .)))
Identify the most serious threats to the survival of species of concern.
(ROOT (S (NP (NNP Overharvesting)) (VP (VBZ is) (NP (DT a) (JJ serious) (NN threat)) (ADVP (RB particularly)) (PP (TO to) (NP (JJ aquatic) (NNS species)))) (. .)))