Shift in crop preference during the breeding season by Yellow Wagtails on arable farms in The NetherlandsReport as inadecuate




Shift in crop preference during the breeding season by Yellow Wagtails on arable farms in The Netherlands - Download this document for free, or read online. Document in PDF available to download.

* Corresponding author 1 Vogelbescherming Nederland

Abstract : Dutch farmland bird populations are in steep decline as a result of agricultural intensification. The Yellow Wagtail is one of those species, but its decrease has mainly occurred in grasslands, with its population in arable areas remaining more or less stable. In contrast, populations of other typical birds of arable habitats, such as the Skylark and Grey Partridge , are declining strongly in this habitat type. The favorable status of the Yellow Wagtail is probably caused by the crop-mosaic composition of arable farms in The Netherlands, which often includes winter cereals, potatoes, and sugar beet. This study focused on crop preference by the Yellow Wagtail during the breeding season. Early in the breeding season Yellow Wagtails showed a strong preference for winter cereals. However, as the breeding season progressed, their preference gradually shifted to broad-leaved crops, especially potatoes. Measurements of the crop structure as an indication for vegetation height or bare ground, revealed that the Yellow Wagtail strongly preferred crops 20-40 cm high. Higher crops were also used more than expected based on a uniform distribution, but to a lesser extent, and crops



Author: Steven Kragten -

Source: https://hal.archives-ouvertes.fr/



DOWNLOAD PDF




Related documents