|
Final model results |
|||||||
| SINDVI |
All |
Fell field |
Dryas |
Cassiope |
Salix heath |
Grassland |
Fen |
|
|
|||||||
| Time of snow-melt |
(-) |
∩ |
(-) |
∩ |
(+) |
+ |
|
| Temperature (during growing season) |
∩ |
+ |
(-) |
∩ |
∩ |
∩ |
|
| Light (during growing season) |
(-) |
+ |
(-) |
U |
(+) |
||
| Rain (during growing season) |
(-) |
+ |
(-) |
(-) |
(-) |
+ |
|
| SINDVI, prev. year |
+ |
+ |
(+) |
(+) |
(+) |
(+) |
|
| Temperature, prev. year |
(-) |
- |
- |
- |
- |
- |
- |
|
|
|||||||
| Variance explained by model (adj. R2) |
0.78 |
0.84 |
0.21 |
0.55 |
0.79 |
0.53 |
0.82 |
|
|
|||||||
| DOYMAX |
All |
Fell field |
Dryas |
Cassiope |
Salix heath |
Grassland |
Fen |
|
|
|||||||
| Time of snow-melt |
(+) |
(+) |
(+) |
(+) |
(+) |
U |
+ |
| Temperature (during green-up) |
(+) |
(+) |
(+) |
(+) |
U |
U |
|
| Light (during green-up*) |
+ |
(+) |
(+) |
||||
| Rain (during green-up*) |
∩ |
∩ |
U |
(+) |
(+) |
∩ |
∩ |
| SINDVI, prev. year |
- |
(+) |
U |
||||
| Temperature, prev. year |
∩ |
(+) |
- |
∩ |
∩ |
∩ |
U |
|
|
|||||||
| Variance explained by model (adj. R2) |
0.89 |
0.98 |
0.85 |
0.97 |
0.98 |
0.89 |
0.98 |
|
Variables included in the final models and their relation to the modeled response variables: seasonal integrated NDVI-FR (SINDVI) and the timing of maximum NDVI-FR (DOYMAX). '+' indicates that the variable has a linear positive correlation with the response variable while '-' indicates a negative linear relation. Brackets indicate a non-linear correlation but with an overall positive or negative trend. '∩' indicate a non-linear response with a maximum, and 'U' indicate a non-linear response with a minimum. Blank indicates that the variable didn't improve the model and was therefore not included * Green-up is defined from the start of the growing season to the day of maximum. | |||||||
Tamstorf et al. BMC Ecology 2007 7:9 doi:10.1186/1472-6785-7-9 |
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