Effect of commercial parking lot planting location (landscape median and perimeter) and time of year (April and August 2002) on leaf carbon assimilation (A), stomatal conductance (gs), internal leaf to ambient CO2 concentrations (Ci/Ca), and leaf chlorophyll concentration (Chl) of four landscape tree species in Phoenix, Arizona.
| Tree species/Parking lot location | A (mol/m2/s) | gs μmol/m2/s) | Ci/Ca | Chl (mg/g) | ||||
|---|---|---|---|---|---|---|---|---|
| Apr | Aug | Apr | Aug | Apr | Aug | Apr | Aug | |
| Australian bottle tree | ||||||||
| Median | 6.0z by | 5.7 b | 82.1 b | 64.7 a | 0.60 a | 0.55 a | 5.6 a | 4.0 b |
| Perimeter | 9.5 a | 6.2 a | 112.5 a | 59.5 a | 0.58 a | 0.50 a | 5.1 b | 4.3 a |
| Arizona ash | ||||||||
| Median | 9.2 a | 7.4 b | 117.0 b | 178.0 b | 0.58 a | 0.76 a | 4.2 b | 4.3 b |
| Perimeter | 11.6 a | 12.2 a | 156.9 a | 241.6 a | 0.58 a | 0.70 b | 4.6 a | 4.7 a |
| Argentine mesquite | ||||||||
| Median | 7.9 a | 5.3 a | 73.6 a | 85.6 a | 0.46 a | 0.67 a | 3.6 b | 4.5 a |
| Perimeter | 8.2 a | 6.5 a | 75.9 a | 103.6 a | 0.47 a | 0.66 a | 5.4 a | 4.7 a |
| Chinese elm | ||||||||
| Median | 6.7 a | 8.6 b | 121.2 b | 110.0 a | 0.66 b | 0.57 a | 3.6 b | 4.0 b |
| Perimeter | 7.1 a | 10.9 a | 110.2 a | 123.9 b | 0.69 a | 0.54 b | 4.2 a | 5.0 a |