( Threats ( to ( the species ) ) )
(ROOT (S (VP (VB Threats) (PP (TO to) (NP (DT the) (NN species))))))
Threats to the species
(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)))) (. .)))