Table 2. Relationships between the magnitude of population fluctuations (response variable) and abundance, total breeding range, coloniality, water habitat and population trend of European breeding bird species according to a phylogenetic generalized least square regression model.
| Term | Estimate (SE) | t | P |
|---|---|---|---|
| Intercept | 1.157 (0.047) | 24.73 | < 0.0001 |
| Abundance | -0.065 (0.008) | -7.98 | < 0.0001 |
| Total range | 0.009 (0.002) | 3.77 | 0.00021 |
| Coloniality | 0.039 (0.015) | 2.57 | 0.011 |
| Water habitat | 0.010 (0.010) | 0.92 | 0.36 |
| Population trend | 0.052 (0.026) | 2.00 | 0.047 |
Phylogenetic relations among species and the number of populations used to estimate population fluctuations in each species were controlled in the analysis (see Statistical analysis for details). The model had the statistics: F = 22.67, adj-r2 = 0.324, N = 227, P < 0.0001, λ = 0.438.