( ( ( The ( photic zone ) ) ( -LRB- ( and ( thus ( ( water clarity ) -RRB- ) ) ) ) ) ( ( has ( ( a ( maximum depth ) ) ( of ( ( 200 m ) ( based ( on ( ( the ( light ( absorption properties ) ) ) ( of water ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ photic) (NN zone)) (PRN (-LRB- -LRB-) (CC and) (ADVP (RB thus)) (NP (NN water) (NN clarity)) (-RRB- -RRB-))) (VP (VBZ has) (NP (NP (DT a) (JJ maximum) (NN depth)) (PP (IN of) (NP (NP (CD 200) (NN m)) (VP (VBN based) (PP (IN on) (NP (NP (DT the) (JJ light) (NN absorption) (NNS properties)) (PP (IN of) (NP (NN water)))))))))) (. .)))
The photic zone (and thus water clarity) has a maximum depth of 200 m based on the light absorption properties of water.
(ROOT (S (NP (DT The) (JJ photic) (NN zone)) (VP (VBZ extends) (ADJP (NP (CD 200) (NNS meters)) (JJ deep))) (. .)))
The photic zone extends 200 meters deep.