Vivid molecular divergence over volcanic remnants: the phylogeography of Megadromus guerinii on Banks Peninsula, New Zealand

Figures & data

Figure 1. Map of Banks Peninsula with sample locations marked by black triangles.

Figure 2. Geophylogeny of Megadromus guerinii CO1 using Bayesian maximum clade credibility tree with taxa nodes mapped to sampling locations on Banks Peninsula. For simplicity, the western and eastern groups are coloured dark red and light blue, respectively.

Figure 3. Phylogeographic divergence of Megadromus guerinii CO1 interpreted as the residual phylogenetic divergence per unit distance interpolation from mid-point values across Banks Peninsula via inverse distance weighting with geographic barriers.

Table 1. Analysis of molecular variance (AMOVA) table generated in Arlequin v3.5 using K2P distances with no added gamma parameters.

Source of variation	d.f.	Sum of squares	Variance components	Percentage of variation
Inter-population	1	432.245	14.76697 Va	89.42944
Intra-population	58	100.961	1.74564 Vb	10.57056
Total	59	533.206	16.51242	100
Φst	0.89429
P-value	< 0.00000

Table 2. Diversity measures and Tajima’s D statistics for the entire population and two subpopulations of Megadromus guerinii.

Population	Nucleotide diversity π	Haplotype diversity h	Tajima’s D
Western population	0.00142 ± 0.00046	0.483 ± 0.115	−2.39149*
Eastern population	0.00833 ± 0.00082	0.944 ± 0.024	−0.61901
Entire population	0.02832 ± 0.00066	0.871 ± 0.038	1.75361

*Indicates statistically significant (P < 0.05) D values.