( ( ( The ( body temperatures ) ) ( of ( aquatic ectotherms ) ) ) ( ( are usually ) ... ) )
(ROOT (S (NP (NP (DT The) (NN body) (NNS temperatures)) (PP (IN of) (NP (JJ aquatic) (NNS ectotherms)))) (VP (VBP are) (ADVP (RB usually))) (: ...)))
The body temperatures of aquatic ectotherms are usually...
(ROOT (S (NP (NNS Ectotherms)) (VP (VBP undergo) (S (NP (NP (DT a) (NN variety)) (PP (IN of) (NP (NP (NNS changes)) (PP (IN at) (NP (DT the) (JJ cellular) (NN level)))))) (VP (TO to) (VP (VB acclimatize) (PP (TO to) (NP (NP (NNS shifts)) (PP (IN in) (NP (NN temperature))))))))) (. .)))