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We assessed the effects of habitat fragmentation on the demography of the locally abundant, long-lived fen plant Swertia perennis L., by examining population structure, components of fitness and herbivory of 17 populations in Switzerland. We distinguished between large MAIN, small, barely isolated NEAR and small, geographically isolated DISTANT habitat islands. Large isolation distance of small sites...
Calcareous fen meadows of low productivity belong to the most species-rich plant communities in central Europe. However, the deterioration of habitat quality by nutrient enrichment might threaten their high species diversity. To assess the potential impact of increased nutrient supply, we performed a two-year field experiment at 18 wetland sites in north-eastern Switzerland. We simulated atmospheric...
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