Table 2.
Results of bootstrapped Pearson correlations of associations, differences and regression coefficients between mean site-level population trends and demographic rates of resident bird species and co-occurring migratory bird species of differing status (arid-zone and humid-zone) on 13 859 PECBMS survey sites and 336 Euro-CE sites across Europe. (*Indicates significant differences from zero (or from unity, in the case of regression coefficients).)
demographic rate | migratory status | mean correlation coefficient (95% CIs) | mean difference migrant – resident (95% CIs) | mean regression coefficient (95% CIs) |
---|---|---|---|---|
population change | arid | 0.12 (0.10–0.15)* | 0.010 (0.005 to 0.013)* | 0.26 (0.21–0.32)* |
humid | 0.18 (0.15–0.20)* | −0.007 (−0.010 to −0.004)* | 0.30 (0.25–0.34)* | |
productivity | arid | 0.44 (0.35–0.52)* | −0.17 (−0.20 to −0.15)* | 0.60 (0.46–0.71)* |
humid | 0.48 (0.42–0.53)* | −0.06 (−0.08 to −0.04)* | 0.60 (0.51–0.69)* | |
adult survival | arid | 0.06 (−0.08–0.21)ns | 0.14 (0.08 to 0.20)* | 0.09 (−0.12–0.35)* |
humid | 0.14 (0.03–0.26)* | 0.12 (0.07 to 0.16)* | 0.19 (0.03–0.35)* |