( ( ( One measure ) ( of biodiversity ) ) ( ( is ( ( ( species richness ) , ) ( which ( is ( ( the number ) ( of ( ( different species ) ( in ( a ( specific area ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (CD One) (NN measure)) (PP (IN of) (NP (NN biodiversity)))) (VP (VBZ is) (NP (NP (NN species) (NN richness)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (JJ different) (NNS species)) (PP (IN in) (NP (DT a) (JJ specific) (NN area))))))))))) (. .)))
One measure of biodiversity is species richness, which is the number of different species in a specific area.
(ROOT (S (NP (NNP Biodiversity)) (VP (VBZ is) (NP (NP (DT a) (NN measurement)) (PP (IN of) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NP (NN variation)) (PP (IN of) (NP (NP (DT the) (NN species)) (PP (IN in) (NP (DT a) (VBN given) (NN area))))))))))) (. .)))