Entwicklung der Brutvogelbestände des Hofes Ritzerau während der schrittweisen Betriebsumstellung auf ökologischen Landbau

The development of breeding bird populations during conversion to organic farming was surveyed on an arable farm in northern Germany. The change of farming prac-tices tended to result in a higher abundance of skylarks (Alauda arvenis). The popula-tions of other farmland bird species as well as the diversity of species showed no apparent trend during conversion