Patterns of Change in Metabolic Capabilities of Sediment Microbial Communities in River and Lake Ecosystems

Table 3

Correlation coefficients of the first two principal components (PC1and PC2) from the water samples collected at three different sites.

Carbon source^†	PC1 (r)	PC2 (r)
Amines
Putrescine	0.701	0.658
Amino acids
L-arginine	0.558
L-asparagine	0.778
L-phenylalanine
L-serine
Glycyl-L-glutamic acid	0.571
L-threonine
Carbohydrates
α-D-lactose	0.536
β-Methyl D-glucoside	0.812
D-cellobiose	0.756	0.878
D-mannitol	0.793
i-Erythritol	0.5490	0.837
Glucose-1-phosphate	0.736
D-galactonic acid γ-lactone	0.538
N-acetyl-D-glucosamine	0.835
D,L-α-glycerol phosphate
D-xylose
Carboxylic acids
α-Ketobutyric acid
D-glucosaminic acid
D-malic acid		−0.775
γ-Hydroxybutyric acid
Pyruvic acid methyl ester
D-galacturonic acid
Itaconic acid
Polymers
α-Cyclodextrin	0.701
Tween 40	0.618
Tween 80	0.791
Glycogen
Phenolic compounds
2-Hydroxybenzoic acid
4-Hydroxybenzoic acid		−0.833

All substrates with an r value > 0.5 are shown (); r = Pearson’s correlation coefficient.