Abstract

To study the factors that limit the occurrence of species in fen grasslands, the effects of mowing and litter removal on germination, growth and establishment of two common species (Silene flos-cuculi andLotus pedunculatus) were analyzed along a productivity gradient at seven sites in Northern Germany. The sites differed in nutrient availability, vegetation composition and standing crop. In autumn 2002 a field experiment was set up at each site, including factorial combinations of two treatments (litter removal, mowing). Seeds and juvenile individuals of both species were transferred within the treatment combinations. The number of germinated and transplanted individuals was recorded during the 2003 and 2004 seasons and biomass of survived plants weighed in late summer 2004.

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