Supplement 1. Data containing a list of studies used in the meta-analysis, including type of CO2 treatment, dominant vegetation, and values for mean ambient and mean elevated activity for the various enzyme groups.

File List data.txt -- (MD5: f6ba0153fbb3db8e543a20ee1f948437) Description The data.txt file is a tab-delimited file. It contains a list of studies used in the meta-analysis, including type of CO₂ treatment, dominant vegetation, and values for mean ambient and mean elevated activity for the various enzyme groups. Column definitions 1. Study citation 2. Type of CO₂ treatment 3. Length of CO₂ treatment 4. Dominant Vegetation 5. Treatment (Elevated or Ambient) 6. Simple Sugar Degradation 7. Starch Degradation 8. b-glucan Degradation 9. Cellulose Degradation 10. Xylan/Hemicellulose Degradation 11. Lignin Degradation 12. Chitin Degradation 13. Protein Degradation 14. Organic P Degradation 15. Organic S Degradation Missing values are represented as “-9999”. Checksum values are (calculations do not include “-9999” for missing values): Column 6 (Simple Sugar Degradation): SUM= 35031.1; 126 missing values (rows with data: 32) Column 8 (b-glucan Degradation): SUM= 24891.97; 102 missing values (rows with data: 56) Column 11 (Lignin Degradation): SUM= 29411.038; 120 missing values (rows with data: 38) Column 15 (Organic S Degradation): SUM= 1053.8; 130 missing values (rows with data: 28)