Effects of regular and irregular temporal patterns of disturbance on biomass accrual and species composition of a subtidal hard-bottom assemblage

Table 2 ANOVA-results for community biomass [wet mass in August (75 days) and dry mass in October (150 days)] and species abundances

Source	df	Biomass				Total species cover				Ciona intestinalis cover
		75 days		150 days		75 days		150 days		75 days		150 days
		F	P	F	P	F	P	F	P	F	P	F	P
Disturbance (D)	1	34.32	0.001	28.66	0.001	20.93	0.003	7.32	0.030	0.28	0.941	3.49	0.104
Irregularity (I)	1	32.61	0.001	26.61	0.001	20.62	0.003	7.84	0.035	9.01	0.020	3.34	0.110
Degree of irregularity (DI)	1	2.83	0.136	1.03	0.345	0.74	0.418	0.18	0.685	0.40	0.547	0.92	0.368
Sequence (irregularity) SQ (I)	1	1.00	0.422	0.11	0.977	1.41	0.255	0.48	0.747	2.67	0.053	0.65	0.629
Block (B)	7	2.85	0.023	3.11	0.015	2.95	0.019	0.64	0.716	3.40	0.009	1.67	0.157
B × D	7	1.55	0.192	0.96	0.475	5.31	0.001	1.56	0.183	0.80	0.594	0.04	1.000
B × I	7	0.47	0.849	0.24	0.970	2.91	0.020	0.39	0.898	0.50	0.827	0.46	0.855
B × DI	7	0.46	0.852	0.86	0.549	2.15	0.071	1.06	0.415	1.76	0.135	1.53	0.197
B × SQ(I)	28	0.61	0.875	0.63	0.860	0.73	0.771	0.69	0.807	0.91	0.597	0.84	0.666
Residual	16

Total species cover and C. intestinalis cover data were arcsine-transformed prior to the analysis. Significant results in bold font
df degrees of freedom

ISSN: 1438-3888