Relationship between Potential Trace Elements Contamination in Sediment and Macrofauna in the Upper Gulf of Thailand

Table 6

The results of PCA of the statistically significant macrofauna and sediment in the upper Thai Gulf.

PCs	Components
	PC1	PC2	PC3
% of variance	62.13	17.23	9.530
Cumulative %	62.13	79.36	88.89
Eigenvalue	6.83	1.89	1.050
Location	0.9394	−0.1970	−0.0444
S-As	0.0032	−0.0301	0.9597
M-As	0.8268	0.2393	−0.0036
S-Pb	0.8162	0.5623	−0.0112
M-Pb	0.0466	0.9852	0.0308
S-Cd	0.8449	0.3328	0.0815
M-Cd	0.2377	0.9654	0.0413
S-Mn	0.8088	0.5477	−0.0428
M-Mn	0.7331	0.6480	−0.0448
S-Ni	0.4018	0.9115	−0.0269
M-Ni	0.5774	0.2307	0.3433

Note. PC = principal component; underlined factor loading is weighted when within 10% of the variation of the absolute value of the highest factor loading in each PC; S = sediment; M = macrofauna.