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Table 5 Mean total kelp density at different depths in homogenous or stratified water masses

From: Regional-scale analysis of subtidal rocky shore community

Depth Low turbidity High turbidity Mann and Whitey test results
N Mean N Mean p value U
−3 m C.M. 22 32.3 15 14.1 0.0009*** 272.5
−8 m C.M. 19 26.0 14 6.4 0.0003*** 232.5
−13 m C.M. 12 13.0 13 1.8 0.0006*** 136.0
  1. N represents the number of data values. p values represent the significance of differences between kelp density among the level of turbidity based on the Mann–Whitney U test; *** p < 0.001