Schneider, Manuel K. and Lüscher, Gisela and Jeanneret, Philippe and Arndorfer, Michaela and Bailey, Debra and Balázs, Katalin and Choisis, Jean-Philippe and Dennis, Peter and Fjellstad, Wendy and Fraser, Mariecia and Frank, Thomas and Friedel, Jürgen Kurt and Gillingham, Pippa and Jerkovich, Gergely and Gomiero, Tiziano and Jongman, Rob H. G. and Kainz, Maximilian and Moreno, Gerardo and Oschatz, Marie-Louise and Paoletti, Maurizio Guido and Pointereau, Philippe and Sarthou, Jean-Pierre and Siebrecht, Norman and Sommaggio, Daniele and Vale, Jim and Wolfrum, Sebastian and Herzog, Felix Artenvielfalt auf biologischen und nicht-biologischen Landwirt- schaftsbetrieben in zehn europäischen Regionen. (2013) In: 12. Fachwissenschaftliche Tagung zum Ökologischen Landbau "Ideal und Wirklichkeit - Perspektiven ökologischer Landbewirtschaftung", 5 March 2013 - 8 March 2013 (Bonn, Germany).
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(Document in German)
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Abstract
One of the aims of organic farming is the protection of biodiversity. In the EU FP7 project BioBio, we studied the effect of organic farming on species numbers at farm level on 169 randomly selected organic and non-organic farms with mostly low to medium intensity in ten European regions. Using a preferential sampling scheme based on habitat mapping, numbers of plants, earthworms, spiders and bees were assessed at farm level. A global analysis across the ten regions shows that organic farms have significantly higher numbers of plant and bee species than non-organic farms. The effect of organic farming on earthworm and spider species numbers are also positive but insignificant. The effects in absolute terms are small and much smaller than the variation between individual farms. Currently ongoing analyses aim at identifying the important driving factors for farmland biodiversity.
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