( ( ( A community ) ( of organisms ) ) ( ( is ( defined ( as ( ( ( a group ) ( of ( ( organisms or ) populations ) ) ) ( found ( living together ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (NN community)) (PP (IN of) (NP (NNS organisms)))) (VP (VBZ is) (VP (VBN defined) (SBAR (IN as) (S (NP (NP (DT a) (NN group)) (PP (IN of) (NP (NNS organisms) (CC or) (NNS populations)))) (VP (VBD found) (S (VP (VBG living) (ADVP (RB together))))))))) (. .)))
A community of organisms is defined as a group of organisms or populations found living together.
(ROOT (S (NP (NP (DT All)) (PP (IN of) (NP (NP (DT the) (NNS populations)) (SBAR (WHNP (WDT that)) (S (VP (VBP live) (PP (IN in) (NP (DT the) (JJ same) (NN area))))))))) (VP (VBP make) (PRT (RP up)) (NP (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NN community)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ includes) (NP (NP (NNS populations)) (PP (IN of) (NP (JJ different) (NNS organisms))))))))) (. .)))
All of the populations that live in the same area make up a(n) community, which includes populations of different organisms.