Effects of Mangrove Zonation and the Physicochemical Parameters of Soil on the Distribution of Macrobenthic Fauna in Kadolkele Mangrove Forest, a Tropical Mangrove Forest in Sri Lanka

Table 9

Summary of the eigenvalues, eigenvectors, and PCA scores of the physicochemical parameters in soil of the 3 mangrove zones in Kadolkele mangrove forest.

Eigenvalues
PC	Eigenvalues	%Variation	Cum. %variation
1	7.21	72.1	72.1
2	2.79	27.9	100.0
Eigenvectors
Variable	PC1	PC2
Soil moisture (%)	−0.367	−0.103
Soil organic matter (%)	−0.371	−0.059
Soil pH	0.325	0.292
Conductivity (mS/cm)	−0.339	−0.247
Salinity	−0.350	−0.204
Penetrability (cm)	−0.301	0.353
Redox length (cm)	0.305	−0.345
Sand %	0.262	−0.426
Silt %	0.102	−0.576
Clay %	0.350	0.204
Principal component scores
Sample	Score 1	Score 2
Rhizophora zone	1.825	−1.559
Avicennia zone	−3.084	−0.203
Lumnitzera zone	1.259	1.761