Table 5.
Least squares model indicating how much variation in leaf senescence dates is explained by percentage leaf drop and percentage leaf colour at the Arnold Arboretum (AA), Garden in the Woods (GitW), Berlin Botanic Garden (Berlin), Ottawa Arboretum (Ottawa), Beijing Botanical Garden (Beijing) and Morton Arboretum (Morton) in 2012 and 2013
| R2 | n | P | F | d.f. | Intercept estimate | % leaf drop estimate | % leaf drop P | % leaf colour estimate | % leaf colour P | |
|---|---|---|---|---|---|---|---|---|---|---|
| AA 2012 | 0·05 | 893 | <0·0001 | 22·27 | 892 | 282·84 | 0·096 | 0·0332 | 0·279 | <0·0001 |
| AA 2013 | 0·06 | 831 | <0·0001 | 25·49 | 830 | 282·05 | 0·080 | 0·0364 | 0·248 | <0·0001 |
| GitW 2012 | 0·23 | 123 | <0·0001 | 18·33 | 122 | 242·18 | 0·629 | <0·0001 | 0·663 | <0·0001 |
| Berlin 2012 | 0·06 | 880 | <0·0001 | 29·42 | 879 | 275·36 | 0·222 | <0·0001 | 0·134 | 0·0005 |
| Berlin 2013 | 0·01 | 937 | <0·0001 | 62·23 | 936 | 285·99 | 0·123 | <0·0001 | -0·112 | 0·0022 |
| Ottawa 2012 | 0·11 | 143 | 0·0004 | 8·23 | 142 | 281·09 | 0·214 | <0·0001 | 0·139 | 0·0032 |
| Ottawa 2013 | 0·41 | 150 | <0·0001 | 51·48 | 149 | 271·47 | 0·426 | <0·0001 | 0·230 | 0·0001 |
| Beijing 2012 | 0·06 | 105 | 0·0495 | 3·10 | 102 | 290·03 | 0·202 | 0·0283 | 0·090 | 0·2868 |
| Beijing 2013 | 0·01 | 140 | 0·5829 | 0·54 | 137 | 292·26 | 0·160 | 0·3094 | 0·133 | 0·4432 |
| Morton 2012 | 0·05 | 134 | 0·0401 | 3·30 | 133 | 274·97 | 0·062 | 0·0326 | 0·036 | 0·2216 |