( ( ( ( A ( species ' ) ) way ) ( of ( making ( a living ) ) ) ) ( ( is ( called ( its niche ) ) ) . ) )
(ROOT (S (NP (NP (NP (DT A) (NN species) (POS ')) (NN way)) (PP (IN of) (S (VP (VBG making) (NP (DT a) (NN living)))))) (VP (VBZ is) (VP (VBN called) (NP (PRP$ its) (NN niche)))) (. .)))
A species' way of making a living is called its niche.
(ROOT (S (NP (DT Each) (NNS species)) (VP (VBZ has) (NP (NP (DT a) (JJ particular) (NN way)) (PP (IN of) (S (VP (VBG making) (NP (NP (DT a) (NN living)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (VP (VBN called) (NP (PRP$ its) (NN niche)))))))))))) (. .)))
Each species has a particular way of making a living, which is called its niche.