Table 1.

Mean ± s.e. difference (organic–conventional) in species abundance (individuals per hectare for separate species), combined species abundance (AFBI, individuals per hectare for combined FBI species) and species richness standardized to 20 individuals (SFBI) on organic and conventional farms, derived from least-squares means. (n = number of sites. n.a. = model did not converge on a solution. Scientific names of species are given in the electronic supplementary material.)

speciesmean differencenp
2001
kestrel0.021 ± 0.29564n.a.
grey partridge0.305 ± 0.454300.780
lapwing−3.083 ± 0.546280.054
woodpigeon0.459 ± 0.195860.140
stock dove1.761 ± 0.356520.015
skylark−0.142 ± 0.253780.745
starling1.853 ± 0.298680.017
rook0.780 ± 0.266720.191
jackdaw1.766 ± 0.234800.007
tree sparrow0.434 ± 0.624140.730
greenfinch0.936 ± 0.306740.064
goldfinch0.372 ± 0.270740.401
linnet2.033 ± 0.376400.027
yellowhammer0.067 ± 0.238800.854
reed bunting1.276 ± 0.562220.188
corn bunting−3.463 ± 0.81880.211
AFBI0.489 ± 0.143860.012
SFBI0.457 ± 0.254800.080
2003
kestrel0.029 ± 0.264620.915
grey partridge−0.270 ± 0.367400.683
lapwing−1.031 ± 0.451360.679
woodpigeon0.568 ± 0.194680.046
stock dove0.789 ± 0.352480.281
skylark−0.061 ± 0.217660.845
starling0.476 ± 0.264620.400
rook0.798 ± 0.285580.171
jackdaw1.467 ± 0.318580.084
tree sparrow1.551 ± 0.701160.203
greenfinch0.859 ± 0.276640.044
goldfinch0.815 ± 0.326560.182
linnet0.902 ± 0.367540.694
yellowhammer−0.419 ± 0.241620.272
reed bunting0.574 ± 0.462380.472
corn bunting−1.233 ± 0.79580.575
AFBI0.428 ± 0.152680.035
SFBI0.161 ± 0.246660.517