300, 600 and 900 ppm Increases in the Air's CO2 Concentration:
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Lemna gibba L. [Swollen Duckweed]
|
300 ppm
|
600 ppm
|
900 ppm
|
|
| Number of Results |
2
|
|
|
| Arithmetic Mean |
47%
|
|
|
| Standard Error |
11.3%
|
|
|
|
Experimental Conditions
|
300 ppm
|
600 ppm
|
900 ppm
|
|
|
Andersen et al. (1985) |
glass vessels (0.4 liter)
|
63%
|
|
|
|
Guy et al. (1990) |
small ponds
|
31%
|
|
|