Zusammenfassung
Wet meadows in Germany are of high conservational value with a strong decline over the last centuries. Occasionally, new meadows developed, providing us with the opportunity to compare vegetation and habitat properties of wet meadows with currently similar, but different historical management. We categorized the areas as ancient, old or young, according to the point of establishment and grassland ...
Zusammenfassung
Wet meadows in Germany are of high conservational value with a strong decline over the last centuries. Occasionally, new meadows developed, providing us with the opportunity to compare vegetation and habitat properties of wet meadows with currently similar, but different historical management. We categorized the areas as ancient, old or young, according to the point of establishment and grassland continuity in the last two centuries. Several trends derived from other grassland types proved also to be true for wet meadows like a high diversity of vascular plants and Red List species in long-term managed grasslands. Old grasslands, established one to two centuries ago, exhibited the highest diversity of vascular plants and bryophytes, indicating additional plants arrived by seeding. We investigated species composition using ordination and indicator species. Ancient grasslands were characterized by plants adapted to wet meadows (Molinietalia) such as Rhinanthus serotinus. Young meadows were marked by plants revealing succession like Carex brizoides or a high productivity. A trend, contrary to other grassland types, was that most habitat properties exhibited no temporal pattern except habitat area and few soil attributes. Altogether, a stepwise intensification from ancient to young meadows was detected that reflects the fast development from traditional to modern agriculture. Including the grassland's history in conservation approaches and adapting the management accordingly will improve restoration attempts. Ancient and old grasslands provided more appropriate species for future wet meadows, whereas young grasslands often need a more intensive land use and would benefit from seeding to develop to species-rich meadows.
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