Table 2.
Analysis | Response variable | Type of model | Estimated means | |||||
---|---|---|---|---|---|---|---|---|
Forest | Suburban | Urban | ||||||
Mean | Std. error | Mean | Std. error | Mean | Std. error | |||
Life history and body mass | Lay date | Poisson GLM | 3.45 (31.46) | 0.03 | 3.32 (27.67) | 0.04 | 3.37 (29.1) | 0.03 |
Clutch size | Poisson GLM | 2.15 (8.59) | 0.06 | 2.05 (7.75) | 0.07 | 2.02 (7.52) | 0.07 | |
Hatch date | Poisson GLM | 4.03 (56.41) | 0.02 | 3.96 (52.55) | 0.03 | 3.99 (54.23) | 0.03 | |
Hatching success | Binomial GLM | 1.15 (0.76) | 0.32 | 2.12 (0.89) | 0.34 | 0.67 (0.66) | 0.30 | |
Fledging success | Binomial GLM | 5.98 (0.99) | 1.26 | −1.15 (0.24) | 1.05 | −6.52 (0.01) | 1.31 | |
Number of fledglings | Poisson GLM | 1.62 (5.06) | 0.08 | 0.97 (2.63) | 0.12 | −0.97 (0.38) | 0.30 | |
Nestling body mass at day 13 | LMM | 11.36 | 0.18 | 9.67 | 0.26 | 9.98 | 0.37 | |
Adult body mass | LMM | 11.39 | 0.32 | 11.14 | 0.45 | 11.51 | 0.33 | |
Caterpillars | Total weight | LMM | 0.013 | 0.003 | 0.001 | 0.003 | ||
Total numbers (log) | LMM | 0.65 (1.92) | 0.09 | 0.06 (1.06) | 0.09 | |||
Provisioning behaviour | Visits per nestling (log) | LMM | 1.33 (3.74) | 0.11 | 1.36 (3.91) | 0.18 | 1.81 (6.10) | 0.11 |
Total visits per nest | LMM | 20.22 | 2.16 | 13.62 | 3.34 | 13.65 | 2.17 | |
Caterpillar volume (log) | LMM | 4.90 (134.12) | 0.20 | 4.57 (96.34) | 0.30 | 4.24 (69.49) | 0.20 | |
Number of caterpillars | LMM | 16.96 | 1.51 | 7.47 | 2.33 | 3.94 | 1.51 | |
Number of other arthropods (log) | LMM | 0.86 (2.37) | 0.22 | 0.97 (2.63) | 0.35 | 1.29 (3.63) | 0.22 | |
Number of unidentified items | LMM | 1.66 | 0.68 | 3.68 | 1.12 | 5.60 | 0.69 | |
Stable isotopes | Eggs δ13C | LM | −23.70 | 0.33 | −22.59 | 0.33 | ||
Eggs δ15N | LM | 5.32 | 0.16 | 4.84 | 0.16 | |||
Adults δ13C | LM | −25.60 | 0.10 | −24.94 | 0.14 | −24.89 | 0.11 | |
Adults δ15N | LM | 5.86 | 0.20 | 5.39 | 0.29 | 6.09 | 0.23 | |
Nestlings δ13C | LM | −26.60 | 0.13 | −25.85 | 0.19 | −25.83 | 0.17 | |
Nestlings δ15N | LM | 5.61 | 0.16 | 5.43 | 0.23 | 6.81 | 0.21 |
For GLMs as well as LMMs in which the response variable was log-transformed, we give both the estimated mean and in brackets the back-transformed mean. The standard errors of those means are not back-transformed.