General linear models fitted to the change of the standardized effect sizes over time both for the breeding and wintering seasons and for the qualitative and quantitative matrices.

CI = 95% confidence interval of the slope. r2  =  coefficient of determination. NODFr  =  Relative NODF. Z  =  standardized effect size of temperature. Z'  =  standardized effect size of WNODF. Values in bold are statistically significant (i.e. 0 is within the 95% confidence intervals).