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Arable field species on organically and conventionally worked farmland at the Eastern base of the Meißner – Developments throughout the last 30 years

Summary
The complete article is written in German
The Eastern base of the Meißner in North Hessia is known as a particularly species-rich refuge of rare arable field plants. In 2002 new data about the present weed vegetation were gathered in 348 records of vegetation on arable land which was already floristically well examined in the years 1975 and 1990. Differentiated between marginal and inner field areas the phytosociological formation of plant communities and their development is presented. Rare plant communities being typical for limestone soils still exist in that region but they increasingly become impoverished and restricted to field margins. Due to a lack of variety more than 2/3 of the recorded plant species in the inner field areas can no longer be assigned to a vegetation unit. Organic fields show a two to three times higher amount of weed species than conventional ones. Likewise the number of weed species in summer crops is considerably higher than in winter crops. All in all a strong decline of species is detected, especially of rare species which characterize plant societies. Possibilities to improve the protection of species getting rare are discussed.

german version

Keywords/Stichworte:Arable field species; decline of species; mapping; fallow land

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Autor:C. HOTZE, Büro für Naturschutz, Ökologie und Landbau, Kasseler Landstraße 29, D-37213 Witzenhausen, E-Mail: Hotze@buero-noel.de;
T. VAN ELSEN, Forschungsinstitut für biologischen Landbau (FiBL Deutschland e.V.), Nordbahnhofstraße 1a, D-37213 Witzenhausen, E-Mail: Thomas van Elsen@fibl.org

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