The colonial ascidian Diplosoma listerianum enhances the occurrence of the hydrozoan Obelia sp. during early phases of succession

Table 4 Influence of the initial density of Diplosoma listerianum colonies (D), site (S) of exposure and weeks since start of the experiment (W) on species richness of the establishing fouling communities during 8 weeks of succession

Source of variation	DF_numerator	DF_denominator	F	p
D	2	30	1.29	0.29
S	1	30	6.76	≤ 0.05
W	3	90	16.17	≤ 0.001
D × S	2	30	0.11	0.90
D × W	6	90	1.77	0.11
S × W	3	90	4.74	≤ 0.01
D × S × W	6	90	3.07	≤ 0.01

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