300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
For a more detailed description of this table, click here.
Quercus ilex L. [Holly Oak]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
11
|
|
|
| Arithmetic Mean |
91.4%
|
|
|
| Standard Error |
30.1%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Aranda et al. (2006) |
Photosynthesis of well watered and fertilized two-year-old seedlings grown for four months in controlled environment chambers in ambient and CO2-enriched air, after which they had all biomass above the point of attachment of the cotyledons to their stems removed from them, after which they were grown under the same conditions for four additional months, after which photosynthetic rates of "resprouted" leaves were measured
|
12%
|
|
|
|
Arena et al. (2005) |
Two-year-old seedlings in pots filled with a sand soil
|
56%
|
|
|
|
Arena et al. (2005) |
Two-year-old seedlings in pots filled with a compost and clay soil
|
65%
|
|
|
|
Blaschke et al. (2001) |
growing naturally near CO2-emitting springs
|
24%
|
|
|
|
Grulke and Paoletti (2005) |
Forty- to sixty-year-old trees located at different distances from a CO2-emitting spring under normal O3 concentrations
|
76%
|
|
|
|
Grulke and Paoletti (2005) |
Forty- to sixty-year-old trees located at different distances from a CO2-emitting spring under 1.7 times normal O3 concentrations
|
42%
|
|
|
|
Marek et al. (2001) |
open-top chambers established around 30-year-old mature oak, sun-exposed leaves
|
58%
|
|
|
|
Marek et al. (2001) |
open-top chambers established around 30-year-old mature oak, shaded leaves
|
51%
|
|
|
|
Rapparini et al. (2004) |
Mature evergreen trees growing close to a natural CO2 spring in central Italy and a nearby control site
|
96%
|
|
|
|
Tognetti et al. (1998) |
Mature trees grown for 15 to 25 years in a basin containing CO2 springs and at a nearby control site of normal ambient CO2; early morning photosynthesis
|
135%
|
|
|
|
Tognetti et al. (1998) |
Mature trees grown for 15 to 25 years in a basin containing CO2 springs and at a nearby control site of normal ambient CO2; afternoon photosynthesis
|
390%
|
|
|