Table 4. Carbon substrates most heavily loaded on first two principal components (PC) in the PCA analysis of Biolog Eco-Plate data.

Field H		Field L
PC1	PC2	PC1	PC2
4-Hydroxybenzoic Acid	Phenylethylamine	Phenylethylamine	4-Hydroxybenzoic Acid
Tween 80	Itaconic Acid	2-Hydroxybenzoic Acid	Tween 80
Glycogen	D-Malic Acid	γ-Hydroxybutyric Acid	L-Arginine
α-Ketobutyric Acid	L-Threonine	D-Xylose	L-Asparagine
L-Phenylalanine	D-Galacturonic Acid	i-Erythritol	L-Serine
Glycyl-L-Glutamic Acid	i-Erythritol	D-Cellobiose	D-Mannitol
D-Mannitol	α-D-Lactose	α-D-Glucose-1-Phosphate	N-Acetyl-D-Glucosamine
D-Cellobiose
Total variation accounted by PC1 or PC2
21.3%	14.1%	22.2%	20.9%

The loading was >0.07 or <−0.07.