Table 6.

Factor loading matrix of the investigated variables for Chlorella vulgaris

Variable	PC 1	PC 2	PC 3	PC 4
Light Intensity, µmol photons m− 2 s− 1	0.73	0.18	-0.60	-0.24
Cultivation Time, day	-0.003	0.45	0.38	-0.46
Lipid Content, % DW	0.78	-0.31	-0.05	0.33
Lipid Productivity, mg L− 1 day− 1	0.59	0.02	0.15	0.12
Total Nitrogen, as NO3-N g L− 1	-0.58	0.41	-0.41	0.03
Total Phosphorus, as PO4-P g L− 1	-0.42	-0.67	-0.31	0.15
N:P	-0.06	0.90	-0.03	0.30
Total variance, %	31.83	27.02	13.82	11.81