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. 2024 Sep 2;12:60. doi: 10.1186/s40462-024-00497-3

Table 4.

The results of linear regression of fuel load (Mf, Eq. 2) against year by species, including change (∆) between 1964 and 2020 and mean Mf for those which showed no significant change

Species Gradient (m) Intercept (b) Adjusted R² Standard error of residuals F P Mean Mf (%) Δ Mf (%)
A. pratensis -0.028 72.94 < 0.01 8.88 0.75 0.39 16.30 -0.67
E. rubecula* -0.104 221.20 0.01 4.45 14.04 < 0.01 -5.83
O. oenanthe 0.211 -407.76 0.05 14.11 3.34 0.07 12.33 11.80
P. collybita -0.108 230.94 < 0.01 9.35 12.10 < 0.01 -6.06
P. modularis -0.153 318.73 0.07 9.38 67.26 < 0.01 -8.57
P. phoenicurus 0.047 -84.16 < 0.01 10.51 1.28 0.26 9.65 2.65
P. trochilus* -0.081 135.81 0.04 3.56 63.31 < 0.01 -8.12
 S. atricapilla* 0.001 12.01 < 0.01 4.87 0.00 0.95 14.79 0.08
S. borin* 0.010 -6.68 < 0.01 4.77 0.06 0.82 13.95 0.58
C. communis 0.043 -70.63 < 0.01 0.14 5.49 < 0.05 2.40
S. vulgaris -0.035 74.62 < 0.01 6.51 0.82 0.37 5.19 -1.95
T. iliacus* -0.140 289.47 0.02872 4.74 24.21 < 0.01 -7.84
T. merula -0.163 332.99 0.09 8.60 381.60 < 0.01 -9.12
T. philomelos -0.257 528.30 0.19 9.29 128.10 < 0.01 -14.37
T. troglodytes* -0.250 509.40 0.1438 4.14 99.23 < 0.01 -14.00

* Species where regressions were conducted using robust standard errors due to heteroscedasticity