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Maximum water depths of vegetation in the seven regression tree classes in relation to depth of sediment motion calculated from the NARFET wave model in 17 New Zealand lakes. The dashed line fitted by 95 % quantile regression indicates the potential depth of emergent vegetation versus exposure (vegetation depth = 3·26 – 0·53DSM, P < 0·01). Classes A–G are as described in Table 3, with constituent species in parenthesis; the species abbreviations are as in Fig. 1.
