Regional-scale analysis of subtidal rocky shore community

Table 6 Distributions of kelp species at different depths in homogenous or stratified water masses

Depth	Homogeneous water		Stratified water		Mann and Whitey test results
Depth	N	Mean (%)	N	Mean (%)	p value	U
−3 m C.D.	18	5.2	16	94.4	<0.0001***	0
−8 m C.D.	14	15.7	12	69.0	0.0006***	17.5
−13 m C.D.	7	0.8	3	8.3	0.5150	8.0

Sp relative abundance, Abundance of Saccorhiza polyschides to total kelp (Laminaria hyperborea, Laminaria ochroleuca and Saccorhiza polyschides) densities; p values represent the significance of differences between Sp relative abundance in different water masses based on the Mann–Whitney U test; *** p < 0.001

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