Table 1.

Metrics of genetic diversity before (blue) and after (red) the marine heatwave.

N number of samples, N_a the total number of alleles, A_r the allelic richness, N_p the number of private alleles, H_o observed heterozygosity, H_e expected heterozygosity, MLH mean number of heterozygous loci per individual. F_IS = inbreeding coefficient and H deficiency is the P value for test of heterozygote deficiency indicative of a population expansion. No data was available at Kalbarri after the heatwave because populations of Ecklonia were extirpated. Instead, the new range edge (Geraldton) was sampled after the heatwave.