( ( ( All populations ) ( of ( different species ) ) ) . )
(ROOT (NP (NP (DT All) (NNS populations)) (PP (IN of) (NP (JJ different) (NNS species))) (. .)))
All populations of different species.
(ROOT (S (NP (NP (DT All) (NNS members)) (PP (IN of) (NP (DT a) (NN species) (NN living)))) (ADVP (RB together)) (VP (VB form) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (NN population))) (. .)))