( and ( ( ( alteration ( of ( ( ( the environment ) and ) ( climatic changes ) ) ) ) ( which ( have ( ( a ( direct impact ) ) ( on ( ( the ( ( composition and ) size ) ) ( of ( ( the population ) ( of ( insect ( vectors ( and ( animal reservoirs ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (FRAG (CC and) (NP (NP (NN alteration)) (PP (IN of) (NP (NP (DT the) (NN environment)) (CC and) (NP (JJ climatic) (NNS changes)))) (SBAR (WHNP (WDT which)) (S (VP (VBP have) (NP (NP (DT a) (JJ direct) (NN impact)) (PP (IN on) (NP (NP (DT the) (NN composition) (CC and) (NN size)) (PP (IN of) (NP (NP (DT the) (NN population)) (PP (IN of) (NP (NN insect) (NNS vectors) (CC and) (NN animal) (NNS reservoirs)))))))))))) (. .)))
and alteration of the environment and climatic changes which have a direct impact on the composition and size of the population of insect vectors and animal reservoirs.
(ROOT (S (NP (NNP Vector)) (VP (VBZ is) (NP (NP (DT a) (NN measure)) (SBAR (WHNP (WDT that)) (S (VP (VBZ has) (NP (DT both) (NN size) (CC and) (NN direction))))))) (. .)))