Figure 3From: Genetic diversity and demographic instability in Riftia pachyptilatubeworms from eastern Pacific hydrothermal ventsCorrelation of expected heterozygosity with tectonic spreading rates ( R2= 0.788, P = 0.0032). Allelic richness exhibits essentially the same relationship (R2= 0.730, P = 0.0069). Black squares are NEPR populations, white squares are SEPR samples and the white circle is the GAR population.Back to article page