Figure 2 Caption:
Comparison of model parameters for onset (A, B) and termination (C, D) dates as a function of latitude. Panels A and C show values and boxplots of the model coefficients for DOY ~ latitude, colored by response: positive (green), non-significant (gray), or negative (blue) correlations. Panels B and D are stacked barplots of the response signs representing the proportion of species demonstrating positive (green), non-significant (gray), or negative (blue) correlations with latitude. Each panel shows five sets of model results. “All Fric1” represents all 105 datasets in the Fric et al. single regressions for DOY ~ latitude, while “All Fric2” represents all 105 datasets in the Fric et al. (2020) “corrected” regressions Res(DOY~altitude, year)~latitude. “Fric1” and “Fric2” correspond to the model results above, showing only results for the 22 species-region datasets used in our reanalysis. “Reanalysis” shows results from our curation and reanalysis of those 22 species-region datasets.