300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
For a more detailed description of this table, click here.
Pinus ponderosa P. & C. Lawson [Ponderosa Pine]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
10
|
10
|
10
|
| Arithmetic Mean |
45.9%
|
0%
|
0%
|
| Standard Error |
8.8%
|
0
|
0%
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Callaway et al. (1994) |
growth chambers, 10/25°C night/day temperature
|
6%
|
||
|
Callaway et al. (1994) |
growth chambers, 15/30°C night/day temperature
|
19%
|
||
|
Constable et al. (1999) |
open-top chambers, 1996 needles in June 1996, no added N
|
109%
|
||
|
Constable et al. (1999) |
open-top chambers, 1996 needles in June 1996, 20 g m-2 added N
|
54%
|
||
|
Constable et al. (1999) |
open-top chambers, 1995 needles in June 1996, no added N
|
71%
|
||
|
Constable et al. (1999) |
open-top chambers, 1995 needles in June 1996, 20 g m-2 added N
|
34%
|
||
|
Constable et al. (1999) |
open-top chambers, 1995 needles in September 1996, no added N
|
58%
|
||
|
Constable et al. (1999) |
open-top chambers, 1995 needles in September 1996, 20 g m-2 added N
|
24%
|
||
|
Houpis et al. (1999) |
open-top chamber
|
42%
|
||
|
Olszyk et al. (2001) |
SPAR units, 2 years
|
42%
|