Table 2.

Relationship between different soil parameters and soil microbial community composition

Set of constraints	Explained fraction of variability (%)
Soil temperature and soil water content	20.3
DOC and dN	4.3
N-acetyl-β-d-glucosaminidase, chitinase and cellobiosidase	5.4
Peptidase	12.1
Phenoloxidase and peroxidase	15.9
Phenoloxidase, peroxidase and peptidase	19.9
Actual protease and cellulase/amylase*	6.3
All enzymes	24.2
All parameters	36.0

Presented are the contributions of constrained variability to total community variability by canonical correspondence analysis (CCA) conducted with different sets of constraining variables. CCA was based on data from bimonthly samplings of control, fertilized and girdled plots between August 2006 and May 2008 (with the exclusion of August 2007 because of missing peroxidase and phenoloxidase data; 11 samplings; n = 195). Additionally, data for July 2006 are missing for cellulose/amylase actitivity

^*(10 samplings; n = 177). DOC, dissolved organic carbon; dN, total dissolved nitrogen.