Table 6. Principal Component Analysis Matrix of Heavy Metals in Mangrove Sediments.

component	Co	V	Cu	Pb	Ni	As	Cd	Hg	initial eigenvalue	variation contribution/%
PC1	0.95	0.92	0.61	0.98	0.98	0.79	0.82	0.70	5.84	72.9
PC2	–0.20	–0.36	0.65	–0.18	–0.13	–0.57	0.55	0.63	1.67	21