Effects of exotic species Larix kaempferi on diversity and activity of soil microorganisms in Dalaoling National Forest Park

Ecological Processes

Table 2 The loading matrix of principal components

PC1			PC2
Carbon sources	Classification	r	Carbon sources	Classification	r
4-Hydroxybenzoic acid	Acids	1.00	d-Xylose	Monosaccharides and glycosides	0.97
d-Malic acid	Acids	1.00	l-Asparagine	Amino acids	0.97
Pyruvic acid methyl ester	Lipids	1.00	Tween 80	Lipids	0.95
β-Methyl-d-glucose	Monosaccharides and glycosides	0.98	Tween 40	Lipids	0.94
l-Serine	Amino acids	0.97	Phenylethylamine	Amines	0.86
d-Galactonic acid γ-lactone	Polymerization saccharides	0.96	d,l-α-Glycerol	Alcohols	0.79
α-Ketobutyric acid	Acids	0.93	Glucose-1-phosphate	Monosaccharides and glycosides	0.75
2-Hydroxybenzoic acid	Acids	0.87
α-d-Lactose	Monosaccharides and glycosides	0.86
l-Arginine	Amino acids	0.85
Itaconic acid	Acids	0.83
d-Glucosaminic acid	Acids	0.80