Plant species composition, species abundances, and species richness were strongly
recruitment limited in a 4‐yr experiment in which seeds of up to 54 species were added to
patches of native grassland. Four field seasons after a one‐time addition of seed, many
added species were still present and reproducing, with plots seeded at the highest rate
having species richness that was 83% greater and total plant cover that was 31% greater
than controls. Total plant community cover increased significantly with the number of species …