300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
For a more detailed description of this table, click here.
Mixed Stand of Quaking Aspen (Populus tremuloides Michx.) and Paper Birch (Betula papyrifera Marsh.)
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
7
|
|
|
| Arithmetic Mean |
76.3%
|
|
|
| Standard Error |
13.6%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
King et al. (2001) |
Fine root biomass of trees grown for two years in FACE arrays under normal ozone concentrations
|
124%
|
|
|
|
King et al. (2001) |
Fine root biomass of trees grown for two years in FACE arrays under 1.5 times the normal ozone concentration
|
99%
|
|
|
|
King et al. (2005) |
Trees grown for seven years in the Aspen FACE study near Rhinelander, Wisconsin, USA
|
68%
|
|
|
|
Liu et al. (2005) |
Leaf litter biomass of seedlings in their sixth year of a FACE CO2 enrichment study under ambient O3 concentration
|
56%
|
|
|
|
Liu et al. (2005) |
Leaf litter biomass of seedlings in their sixth year of a FACE CO2 enrichment study under 1.5 times the ambient O3 concentration
|
44%
|
|
|
|
Pregitzer et al. (2008) |
Root biomass of trees growing in the FACTS-II FACE project near Rhinelander, Wisconsin (USA) under ambient (A) ozone concentration -- since May 1998
|
23%
|
|
|
|
Pregitzer et al. (2008) |
Root biomass of trees growing in the FACTS-II FACE project near Rhinelander, Wisconsin (USA) under elevated (E = 1.5x A) ozone concentration -- since May 1998
|
120%
|
|
|