Percent Photosynthesis (Net CO2 Exchange Rate) Increases for
300, 600 and 900 ppm Increases in the Air's CO2 Concentration:


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Larix decidua [European Larch]


Statistics
 
300 ppm
600 ppm
900 ppm
 Number of Results
4
4
4
 Arithmetic Mean
62%
0%
0%
 Standard Error
3.6%
0
0%

Individual Experiment Results

Journal References

Experimental Conditions
300 ppm
600 ppm
900 ppm

Handa et al. (2005)

27-year-old trees in a FACE study conducted at the treeline (2180 m above sea level) in the Swiss Central Alps (2002)
68%

Handa et al. (2005)

27-year-old trees in a FACE study conducted at the treeline (2180 m above sea level) in the Swiss Central Alps (2003)
51%

Hattenschwiler et al. (2002)

Three-month Swiss alpine treeline FACE study
69%

Streit et al. (2014)

35-year-old trees that had been growing in FACE arrays within an afforestation site close to Davos, Switzerland, at an altitude of 2180 m.a.s.l. for the prior nine years
60%


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