Percent Dry Weight (Biomass) Increases for
300, 600 and 900 ppm Increases in the Air's CO2 Concentration:


For a more detailed description of this table, click here.

Shortgrass steppe in NE Colorado
[Bouteloua gracilis, Pascopyrum smithii, and Stipa comata]


Statistics
 
300 ppm
600 ppm
900 ppm
 Number of Results
13
 
 
 Arithmetic Mean
34.5%
 
 
 Standard Error
4.2%
 
 

Individual Experiment Results

Journal References
Experimental Conditions
300 ppm
600 ppm
900 ppm

Dijkstra et al. (2008)
Semi-arid grassland vegetation harvested in each of five years (mean result) of an open-top chamber study conducted in northeast Colorado, USA
37%

 
 

Ferretti et al. (2003)
Representative areas of the natural ecosystem enclosed within open-top chambers, year 2000
55%

 
 

Ferretti et al. (2003)
Representative areas of the natural ecosystem enclosed within open-top chambers, year 2001
28%

 
 

Milchunas et al. (2005a)
Root biomass from a five-year open-top chamber study conducted under natural conditions at the USDA-ARS Central Plains Experimental Range in north central Colorado, USA
49%

 
 

Milchunas et al. (2005b)
Root biomass of plants exposed to natural conditions for entire growing seasons in open-top chambers
55%

 
 

Milchunas et al. (2005b)
Root biomass of plants exposed to natural conditions for entire growing seasons in open-top chambers; two years of intermediate levels of precipitation
53%

 
 

Milchunas et al. (2005b)
Root biomass of plants exposed to natural conditions for entire growing seasons in open-top chambers; very wet year
28%

 
 

Milchunas et al. (2005b)
Root biomass of plants exposed to natural conditions for entire growing seasons in open-top chambers; very dry year
0%

 
 

Morgan et al. (2001)
open top chambers in NE Colorado, no defoliation treatment
32%

 
 

Morgan et al. (2001)
open top chambers in NE Colorado, defoliation treatment
30%

 
 

Nelson et al. (2004)
Portions of the ecosystem were enclosed by large open-top chambers for five years; aboveground biomass
34%

 
 

Pendall et al. (2004)
Portions of ecosystem enclosed by open-top chambers for five years; aboveground biomass
28%

 
 

Pendall et al. (2004)
Portions of ecosystem enclosed by open-top chambers for five years; belowground biomass
19%

 
 

Printer Friendly Version