300, 600 and 900 ppmIncreases in the Air's CO2 Concentration:
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Betula pubescens Ehrh. [Downy Birch]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
4
|
|
|
| Arithmetic Mean |
113.5%
|
|
|
| Standard Error |
67.2%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Beerling et al. (1996) |
greenhouse, + 3°C warming, year 1
|
55%
|
|
|
|
Beerling et al. (1996) |
greenhouse, + 3°C warming, year 2
|
15%
|
|
|
|
Beerling and Woodward (1996) |
controlled environment greenhouse, July
|
345%
|
|
|
|
Beerling and Woodward (1996) |
controlled environment greenhouse, September
|
39%
|
|
|