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


For a more detailed description of this table, click here.

Populus tremuloides Michx. [Quaking Aspen]


Statistics
 
300 ppm
600 ppm
900 ppm
 Number of Results
54
 
 
 Arithmetic Mean
80.3%
 
 
 Standard Error
10.7%
 
 

Individual Experiment Results

Journal References

Experimental Conditions
300 ppm
600 ppm
900 ppm

Calfapietra et al. (2008)

Photosynthesis of mid-day sun-exposed upper-canopy leaves of trees in ozone-polluted-air (1.5 x ambient) in the 8th year of the Aspen FACE experiment near Rhinelander, Wisconsin, USA (ozone tolerant clone)
50%

 

 

Calfapietra et al. (2008)

Photosynthesis of mid-day sun-exposed upper-canopy leaves of trees in ozone-polluted-air (1.5 x ambient) in the 8th year of the Aspen FACE experiment near Rhinelander, Wisconsin, USA (ozone sensitive clone)
30%

 

 

Calfapietra et al. (2008)

Photosynthesis of mid-day sun-exposed upper-canopy leaves of trees in ambient-ozone-air in the 8th year of the Aspen FACE experiment near Rhinelander, Wisconsin, USA (ozone tolerant clone)
55%

 

 

Calfapietra et al. (2008)

Photosynthesis of mid-day sun-exposed upper-canopy leaves of trees in ambient-ozone-air in the 8th year of the Aspen FACE experiment near Rhinelander, Wisconsin, USA (ozone sensitive clone)
75%

 

 

Cseke et al. (2009)

Photosynthesis of trees grown for nine years at the Aspen FACE site near Rhinelander, Wisconsin, USA (clone 216)
59%

 

 

Cseke et al. (2009)

Photosynthesis of trees grown for nine years at the Aspen FACE site near Rhinelander, Wisconsin, USA (clone 271)
27%

 

 

Curtis et al. (2000)

open-top chambers, low-N soil, 1995
22%

 

 

Curtis et al. (2000)

open-top chambers, low-N soil, 1996
28%

 

 

Curtis et al. (2000)

open-top chambers, high-N soil, 1995
48%

 

 

Curtis et al. (2000)

open-top chambers, high-N soil, 1996
110%

 

 

Darbah et al. (2010a)

Average maximum instantaneous photosynthetic stimulation (clone 42E) measured over the last five years of the Aspen FACE experiment near Rhinelander, Wisconsin (USA) -- which was established in 1997 -- at the 11-year point of that study
82%

 

 

Darbah et al. (2010a)

Average maximum instantaneous photosynthetic stimulation (clone 271) measured over the last five years of the Aspen FACE experiment near Rhinelander, Wisconsin (USA) -- which was established in 1997 -- at the 11-year point of that study
85%

 

 

Darbah et al. (2010b)

Photosynthesis of originally six-month-old saplings (clone 42E) that had been grown for nine more years at the Aspen FACE site in Wisconsin (USA), measured during a period of unusual warmth within a temperature range of 32-35C
49%

 

 

Darbah et al. (2010b)

Photosynthesis of originally six-month-old saplings (clone 42E) that had been grown for nine more years at the Aspen FACE site in Wisconsin (USA), measured during a period of unusual warmth within a temperature range of 36-39C
349%

 

 

Darbah et al. (2010b)

Photosynthesis of originally six-month-old saplings (clone 271) that had been grown for nine more years at the Aspen FACE site in Wisconsin (USA), measured during a period of unusual warmth within a temperature range of 32-35C
61%

 

 

Darbah et al. (2010b)

Photosynthesis of originally six-month-old saplings (clone 271) that had been grown for nine more years at the Aspen FACE site in Wisconsin (USA), measured during a period of unusual warmth within a temperature range of 36-39C
318%

 

 

Darbah et al. (2010b)

Photosynthesis of young trees of clone 42E in the ninth year of the Aspen FACE study near Rhinelander, Wisconsin (USA) during an unusually intense heat wave, measured within a temperature range of 32-35C
46%

 

 

Darbah et al. (2010b)

Photosynthesis of young trees of clone 42E in the ninth year of the Aspen FACE study near Rhinelander, Wisconsin (USA) during an unusually intense heat wave, measured within a temperature range of 36-39C
327%

 

 

Darbah et al. (2010b)

Photosynthesis of young trees of clone 271 in the ninth year of the Aspen FACE study near Rhinelander, Wisconsin (USA) during an unusually intense heat wave, measured within a temperature range of 32-35C
57%

 

 

Darbah et al. (2010b)

Photosynthesis of young trees of clone 271 in the ninth year of the Aspen FACE study near Rhinelander, Wisconsin (USA) during an unusually intense heat wave, measured within a temperature range of 36-39C
298%

 

 

Ellsworth et al. (2004)

Plants grown under natural conditions for three years in a FACE study
37%

 

 

Fleischmann et al. (2010)

Well watered and fertilized plants grown from seed for nearly two years in CO2-enriched air at normal soil nitrogen (1N) concentration and grown for an additional 19 weeks
4%

 

 

Fleischmann et al. (2010)

Well watered and fertilized plants grown from seed for nearly two years in CO2-enriched air at normal soil nitrogen (1N) concentration, after which the seedlings were infected with the root pathogen Phytophthora citricola and grown for an additional 19 weeks
65%

 

 

Fleischmann et al. (2010)

Well watered and fertilized plants grown from seed for nearly two years in CO2-enriched air at twice normal soil nitrogen (2N) concentration and grown for an additional 19 weeks
23%

 

 

Fleischmann et al. (2010)

Well watered and fertilized plants grown from seed for nearly two years in CO2-enriched air at twice normal soil nitrogen (2N) concentration, after which the seedlings were infected with the root pathogen Phytophthora citricola and grown for an additional 19 weeks
35%

 

 

Karnosky et al. (1999)

FACE plots, 30-m diameter
65%

 

 

Karnosky et al. (2005)

Plants grown from the young seedling stage for four years under natural environmental conditions at the Aspen FACE site near Rhinelander, Wisconsin, USA
52%

 

 

Kets et al. (2010)

Photosynthesis of sunlit upper-canopy leaves of originally six-month-old saplings (clone 271) that had been grown for 8-9 more years at the Aspen FACE site in Wisconsin (USA) without a 50% increase in the ambient ozone (O3) concentration of the air, measured from early June to the end of August
68%

 

 

Kets et al. (2010)

Photosynthesis of sunlit upper-canopy leaves of originally six-month-old saplings (clone 271) that had been grown for 8-9 more years at the Aspen FACE site in Wisconsin (USA) with a 50% increase in the ambient ozone (O3) concentration of the air, measured from early June to the end of August
82%

 

 

Kets et al. (2010)

Photosynthesis of sunlit upper-canopy leaves of originally six-month-old saplings (clone 42E) that had been grown for 8-9 more years at the Aspen FACE site in Wisconsin (USA) without a 50% increase in the ambient ozone (O3) concentration of the air, measured from early June to the end of August
55%

 

 

Kets et al. (2010)

Photosynthesis of sunlit upper-canopy leaves of originally six-month-old saplings (clone 42E) that had been grown for 8-9 more years at the Aspen FACE site in Wisconsin (USA) with a 50% increase in the ambient ozone (O3) concentration of the air, measured from early June to the end of August
96%

 

 

Kubiske et al. (1998)

open-top chambers, early leaf-fall,low soil nitrogen
52%

 

 

Kubiske et al. (1998)

open-top chambers, early leaf-fall,high soil nitrogen
82%

 

 

Kubiske et al. (1998)

open-top chambers, late leaf-fall,low soil nitrogen
35%

 

 

Kubiske et al. (1998)

open-top chambers, late leaf-fall,high soil nitrogen
59%

 

 

Liu et al. (2006)

Photosynthesis of well watered and fertilized one-year-old seedlings grown for 60 more days in greenhouses
20%

 

 

Mikan et al. (2000)

open top chamber, low nitrogen
47%

 

 

Mikan et al. (2000)

open top chamber, high nitrogen
84%

 

 

Monson et al. (2007)

Photosynthesis of trees growing for eight years at the Aspen FACE facility near Rhinelander, Wisconsin (USA) over the period 11-21 July 2006
130%

 

 

Noormets et al. (2001)

FACE, O3-tolerant clones, ambient O3
50%

 

 

Noormets et al. (2001)

FACE, O3-tolerant clones, elevated O3
74%

 

 

Noormets et al. (2001)

FACE, O3-sensitive clones, ambient O3
57%

 

 

Noormets et al. (2001)

FACE, O3-sensitive clones, elevated O3
57%

 

 

Riikonen et al. (2008)

Late-season photosynthesis (averaged over the growing season) of clone 216 trees in their 8th-9th years of CO2 enrichment at the Aspen FACE site near Rhinelander, Wisconsin (USA)
91%

 

 

Riikonen et al. (2008)

Photosynthesis (averaged over the growing season) of clone 42E trees in their 8th-9th years of CO2 enrichment at the Aspen FACE site near Rhinelander, Wisconsin (USA)
158%

 

 

Riikonen et al. (2008)

Photosynthesis (averaged over the growing season) of clone 271 trees in their 8th-9th years of CO2 enrichment at the Aspen FACE site near Rhinelander, Wisconsin (USA)
112%

 

 

Sharkey et al. (1991)

pots, low CO2 adapted
73%

 

 

Sharkey et al. (1991)

pots, high CO2 adapted
90%

 

 

Stamenkovic and Gustin (2009)

Photosynthesis of one-year-old bare-root saplings grown in sandy, fine-loamy soil in the laboratory within a gas exchange chamber
230%

 

 

Takeuchi et al. (2001)

FACE plots, upper canopy
39%

 

 

Takeuchi et al. (2001)

FACE plots, lower canopy
5%

 

 

Tjoelker et al. (1998)

Seedlings grown for three months in controlled environment chambers at day/night temperatures ranging from 18/12 to 30/24°C (average results)
19%

 

 

Volin et al. (1998)

controlled-environment chamber, low ozone
-19%

 

 

Volin et al. (1998)

controlled-environment chamber,high ozone
33%

 

 

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