Table 1 The relative abundance of intertidal organisms measured before and after rat eradication (Mean ± SE) (2008 and 2013: n = 8; 2019: n = 7).

Intertidal organism	Pre	Post	2008 vs. 2013		Post	2008 vs. 2019
Intertidal organism	2008	2013	t	P	2019	t	P
% Encrusting Algae	47.9 ± 3.1	12.67 ± 2.84	− 8.3931	< 0.0001*	5.9 ± 1.3	− 12.435	< 0.0001*
% Fleshy Algae	25.5 ± 2.3	26.09 ± 2.36	0.1858	NS	38.0 ± 3.2	3.151	0.0045*
% Geniculate Algae	4.52 ± 1.4	3.62 ± 0.98	− 0.5258	NA	3.2 ± 1.02	− 0.763	0.2298
% Barnacles	0.19 ± 0.11	0.21 ± 0.14	0.0965	NS	0.22 ± 0.18	0.136	0.4472
% Sponges	9.44 ± 2.4	8.51 ± 1.18	− 0.3427	NS	3.69 ± 0.84	− 2.245	0.0263*
% Tunicates	1.99 ± 0.5	1.87 ± 0.59	− 0.1513	NS	2.12 ± 0.69	0.148	0.4424
Anemones m⁻²	66.6 ± 20.9	75.6 ± 33.98	− 0.1141	NS	17.1 ± 10.9	− 3.003	0.0061*
Isopods m⁻²	85.7 ± 20.9	10.68 ± 2.82	− 4.973	0.0001*	1.69 ± 0.63	− 9.195	< 0.0001*
Limpets m⁻²	26.4 ± 4.6	23.19 ± 4.95	− 0.6545	NS	13.5 ± 2.9	− 2.219	0.0255*
Mussels m⁻²	54.9 ± 39.5	3.43 ± 3.15	− 1.5288	NS	0.61 ± 0.47	− 1.934	0.0447*
Sea Stars m⁻²	8.1 ± 3.08	4.95 ± 1.41	− 0.2225	NS	1.59 ± 0.72	− 1.919	0.0395*
Snails m⁻²	359.7 ± 72.1	191.04 ± 45.16	− 1.6452	NS	31.0 ± 11.5	− 5.452	< 0.0001*
Urchins m⁻²	20.3 ± 5.5	11.63 ± 4.33	− 1.2599	NS	10.4 ± 2.34	− 1.088	0.1481

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