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Table III
Characteristics of the photosynthetic temperature response as defined by equation (1) for fall 2006 and summer 2007. Pnopt is the maximum net CO2 uptake rate at the temperature optimum Topt, and the factor a describes the spread of the parabola.
| Site | Year | Pnopt (μmol m−2 s−1) | Topt (°C) | a |
|---|---|---|---|---|
| Forest limit | Fall 2006 | 3.30 ± 0.21 | 16.3 | 0.0050 |
| Summer 2007 | 5.19 ± 0.72 | 17.1 | 0.0148 | |
| Tree limit | Fall 2006 | 4.02 ± 0.46 | 14.8 | 0.0052 |
| Summer 2007 | 5.45 ± 1.41 | 15.1 | 0.0082 | |
| Krummholz limit | Fall 2006 | 4.59 ± 0.21 | 13.7 | 0.0076 |
| Summer 2007 | 5.48 ± 0.66 | 13.5 | 0.0147 |