Table 1.

Results of repeated-measures ANOVA to test for differences in F_v/F_m, relative growth rate and bleaching index for the kelp species Laminaria digitata and Laminaria ochroleuca in response to simulated marine heatwave experiments. Significant values (P < 0.05) are highlighted in bold.

		Laminaria digitata			Laminaria ochroleuca
Effect	d.f.	F	P	d.f.	F	P
F v /F m
Duration	1	0.5	0.480	1	47.6	<0.001
Intensity	1.02	8.6	0.030	2	28.9	<0.001
Timepoint	2	8.5	0.007	2	32.5	<0.001
Duration:Intensity	1.1	0.2	0.680	2	8.3	0.009
Duration:Timepoint	2	0.1	0.900	2	3.01	0.09
Intensity:Timepoint	1.66	4.8	0.045	4	12.8	0.002
Duration:Intensity:Timepoint	4	0.4	0.770	4	1.5	0.200
Relative growth rate
Duration	1	2	0.240	1	3.6	0.160
Intensity	2	8.2	0.008	2	26.9	<0.001
Timepoint	1	12.8	0.016	2	35	<0.001
Duration:Intensity	2	2	0.182	2	13.7	<0.001
Duration:Timepoint	1	12.7	0.160	1.09	9.1	<0.003
Intensity:Timepoint	2	12.7	0.002	1.24	20.98	<0.001
Duration:Intensity:Timepoint	2	12.7	0.002	4	7.2	<0.001
Bleaching
Duration	1	2.02	0.210	1	3.6	0.110
Intensity	1.01	8.2	0.030	2	26.9	<0.001
Timepoint	2	9.5	0.005	2	35	<0.001
Duration:Intensity	1	2.01	0.210	2	13.7	0.001
Duration:Timepoint	2	4.9	0.03	1.09	9.2	0.002
Intensity:Timepoint	4	9.34	<0.001	1.24	20.1	0.003
Duration:Intensity:Timepoint	4	5.7	0.003	4	7.2	<0.001