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Table 5 Results of two analyses of covariance to test the effect of tree species (tree) and nest part (i.e. cup lining or outer nest), with latitude and longitude as covariates, on the mass of leaf from the four commonest tree species, and bark from four commonest plant species found in nests (see Fig. 5)

From: Geographical location affects size and materials used in the construction of European Pied Flycatcher (Ficedula hypoleuca) nests

Source Leaf (R2 = 49.1%) Bark (R2 = 10.2%)
df F value (p value) df F value (p value)
Latitude 12,575 3.13 (0.077) 1,2575 3.68 (0.055)
Longitude 12,575 9.59 (0.862) 1,2575 2.67 (0.103)
Tree 12,575 23.91 (< 0.001) 3,2575 7.04 (< 0.001)
Nest part 32,575 1.19 (0.275) 1,2575 5.08 (0.024)
Latitude × longitude 12,575 3.04 (0.081) 1,2575 2.53 (0.112)
Latitude × tree 32,575 22.45 (< 0.001) 3,2575 6.97 (< 0.001)
Latitude × nest part 12,575 1.31 (0.252) 1,257 5.00 (0.025)
Longitude × tree 32,575 21.88 (< 0.001) 3,2575 5.24 (0.001)
Longitude × nest part 12,575 1.85 (0.174) 1,2575 4.53 (0.033)
Nest part × tree 32,575 73.59 (< 0.001) 3,2575 2.26 (0.079)
Latitude × longitude × tree 32,575 21.40 (< 0.001) 3,2575 5.22 (0.001)
Latitude × longitude × nest part 32,575 1.85 (0.174) 1,2575 4.51 (0.034)
  1. The model included box area (cm2) as a covariate to control for variation in box size between locations. Bark masses were Log10-transformed prior to analysis. Model reflects sequential model reduction by removal of non-significant higher order interactions