( ( throughout ( ( tropics , ) ( with ( some ( temperate-zone species ) ) ) ) ) . )
(ROOT (FRAG (PP (IN throughout) (NP (NP (NNS tropics)) (, ,) (PP (IN with) (NP (DT some) (JJ temperate-zone) (NN species))))) (. .)))
throughout tropics, with some temperate-zone species.
(ROOT (S (NP (NP (DT Some)) (PP (IN of) (NP (NP (DT the) (JJS greatest) (NNS concentrations)) (PP (IN of) (NP (NNS species)))))) (VP (VBP are) (VP (VBN found) (PP (IN in) (NP (DT the) (NNS tropics))))) (. .)))