Dragonflies of Nee Soon swamp forest 
139 
Fig. 9. Scree plot with a random model (broken stick), indicating that only the first four PC As 
are statistically significant. 
Table 6. Result of Ordinary Least Square (OLS) test on the significance of the link between 
habitat characteristics represented by the four PC axes and diversity of the odonate community 
at sampling locations in Nee Soon freshwater swamp forest, represented by Shannon-Weaver 
Index (H’) and Species Richness (R). 
PCI 
PC2 
PC3 
PC4 
H’ 
R 
H’ 
R 
H’ 
R 
H’ 
R 
Permutation p 
0.0093 
0.0005 
0.9271 
0.3365 
0.0082 
0.013 
0.2936 
0.3787 
Durbin-Watson test p 
0.32 
0.0913 
0.3122 
0.0995 
0.4073 
0.0055 
0.1725 
0.0115 
Breusch-Pagan test p 
0.649 
0.164 
0.0642 
0.00395 
0.2938 
0.3069 
0.9548 
0.6238 
