“…High amounts of seed input are required to keep the regenerative potential of semi-natural grasslands at a sufficiently high level, since post-dispersal processes such as seedling emergence and establishment are often limited, e.g. by seed availability (Zobel et al, 2000), granivory or seedling mortality (Eichberg et al, , 2007. In several dry grassland species, the population size was indeed regulated by seed limitation (Erikson, 1997(Erikson, , 1998.…”