( ( The ( competitive ( exclusion principle ) ) ) ( ( states ( that ( ( ( no ( two species ) ) ( with ( the ( same ( fundamental niche ) ) ) ) ) ( ( can indefinitely ) ( occupy ( the ( same habitat ) ) ) ) ) ) ) ; ) )
(ROOT (S (NP (DT The) (JJ competitive) (NN exclusion) (NN principle)) (VP (VBZ states) (SBAR (IN that) (S (NP (NP (DT no) (CD two) (NNS species)) (PP (IN with) (NP (DT the) (JJ same) (JJ fundamental) (NN niche)))) (VP (MD can) (ADVP (RB indefinitely)) (VP (VB occupy) (NP (DT the) (JJ same) (NN habitat))))))) (: ;)))
The competitive exclusion principle states that no two species with the same fundamental niche can indefinitely occupy the same habitat;
(ROOT (S (NP (JJ Competive) (NN exclusion) (NN princple)) (VP (VBZ explains) (SBAR (WHADVP (WRB why)) (S (NP (CD two) (JJ different) (NNS species)) (VP (MD can) (RB not) (VP (VB occupy) (NP (NP (DT the) (JJ same) (NN niche)) (PP (IN in) (NP (DT the) (JJ same) (NN place)))) (PP (IN for) (ADJP (RB very) (JJ long)))))))) (. .)))