300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Pristine Tallgrass Prairie
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
3
|
|
|
| Arithmetic Mean |
23.3%
|
|
|
| Standard Error |
12.2%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Owensby et al. (1999) |
Root biomass of eight-year open-top-chamber study
|
50%
|
|
|
|
Owensby et al. (1999) |
Open-top chambers, 3 years, above average precipitation, aboveground biomass
|
-2%
|
|
|
|
Owensby et al. (1999) |
Open-top chambers, 5 years, below average precipitation, aboveground biomass
|
22%
|
|
|