Figure 2. Relative abundance of Ligia occidentalis (LO) and Ligia pallasii (LP) along the surveyed coastline (x axis left to right represents latitudinal coordinates of sampling sites from south to north). LO showed slight but not significant decline in abundance towards the northern range of the distribution Spearman's ρ – 0.0863, p <|ρ| = 0.3680. LP showed a small but significant decline towards the southern range limit (positive correlation with increasing latitude Spearman's ρ 0.5499, p <|ρ| = 0.0001. Lines within sites mark area of range overlap (solid line range limit of species in plot, dashed line range limit of other Ligia species).