Appendix A. Additional temperature data for controls and open-topped chambers.
TABLE A1. Summary of temperature differences (°C) between controls and warming chambers, and percent of time chambers were actually warmer than control plots, approximately same temperature as control plots, or cooler than control plots. Differences are average of control minus chamber temperatures taken every 10–15 minutes. Positive numbers indicate warming was occurring. Plots were considered to be warmer if temperature difference was ≥ 0.5 °C, cooler if difference was ≤ -0.5 °C, and not different if difference was between -0.5 and 0.5 °C.
June | July | August | September | October | ||
S. alterniflora plots | ||||||
Overall avg. difference | -0.19 | 0.69 | 0.8 | 0.69 | 0.77 | |
Avg. difference 7am–7pm | -0.30 | 1.17 | 1.76 | 1.24 | 1.52 | |
Avg. difference 10am–4pm | -0.69 | 1.25 | 2.27 | 1.47 | 1.7 | |
Range of temp. differences | 4.48 to -2.75 | 6.45 to -2.91 | 8.17 to -3.81 | 7.01 to -1.36 | 5.87 to -1.79 | |
Percent of time warming | 8 | 42 | 38 | 38 | 45 | |
Percent of time no difference | 75 | 54 | 52 | 57 | 46 | |
Percent of time cooling | 17 | 4 | 10 | 5 | 9 | |
S. patens/Distichlis plots | ||||||
Overall avg. difference | 0.09 | 0.65 | 1.17 | 0.8 | 0.47 | |
Avg. difference 7am–7pm | -0.04 | 0.98 | 2.27 | 1.56 | 0.89 | |
Avg. difference 10am–4pm | -0.01 | 1.36 | 2.77 | 1.84 | 1.23 | |
Range of temp. differences | 4.75 to -4.67 | 7.24 to -2.33 | 9.42 to -3.91 | 8.16 to -5.74 | 13.97 to -11.38 | |
Percent of time warming | 22 | 48 | 44 | 41 | 47 | |
Percent of time no difference | 63 | 41 | 51 | 54 | 27 | |
Percent of time cooling | 15 | 11 | 5 | 5 | 26 | |