Table 6. Test results for group separation of compared species within clade 4 along first two PCA axes (PC1 and PC2).

PC	Group pairwise	Estimate	SE	df	t. ratio	P-value	Sig
PCA scores for each axis were grouped by species and compared pairwise using Tukey HSD tests to adjust for multiple comparisons. Sig: Significance levels. NS: Not significant; ***: P<0.001.
1	jin vs. mon	5.62	0.425	79	13.21	<0.0001	***
	jin vs. ngwel	3.15	0.286	79	11.045	<0.0001	***
	jin vs. simao	1.1	0.213	79	5.16	<0.0001	***
	jin vs. tony	6.64	0.384	79	17.277	<0.0001	***
	mon vs. ngwel	–2.46	0.481	79	–5.118	<0.0001	***
	mon vs. simao	–4.52	0.442	79	10.216	<0.0001	***
	mon vs. tony	1.02	0.546	79	1.875	0.3392	NS
	ngwel vs. simao	–2.05	0.31	79	–6.621	<0.0001	***
	ngwel vs. tony	3.49	0.445	79	7.825	<0.0001	***
	simao vs. tony	5.54	0.403	79	13.747	<0.0001	***
2	jin vs. mon	–1.074	0.627	79	–1.712	0.4324	NS
	jin vs. ngwel	–0.535	0.421	79	–1.27	0.7105	NS
	jin vs. simao	–1.525	0.315	79	–4.847	0.0001	***
	jin vs. tony	1.023	0.567	79	1.804	0.3789	NS
	mon vs. ngwel	0.539	0.71	79	0.76	0.9413	NS
	mon vs. simao	–0.45	0.652	79	–0.691	0.958	NS
	mon vs. tony	2.097	0.805	79	2.605	0.0792	NS
	ngwel vs. simao	–0.99	0.458	79	–2.163	0.2048	NS
	ngwel vs. tony	1.558	0.657	79	2.37	0.1346	NS
	simao vs. tony	2.547	0.595	79	4.284	0.0005	***