Figure 3.

The relationship between δ¹⁵N values and N concentration [%] in leaves of six plant species across four restoration treatment. Restoration treatments are: with topsoil removal and hay transfer (+r+h), with topsoil removal and without hay transfer (+r−h), without topsoil removal and with hay transfer (−r+h), without topsoil removal and without hay transfer (−r−h). Closed symbols indicate legume species, open symbols non-legume species; black symbols indicate target species: Anthyllis vulneraria (●) and Dorycnium germanicum (▼), Helianthemum nummularium (black-open: ^) and gray symbols indicate mesic, non-target species: Lotus corniculatus (), Trifolium pratense () and Galium mollugo (). Every symbol in this figure represents one replicate per species and restoration treatment, mean values are given in Figure 3, neighborhood effects of legumes on non-legume species are shown in Figure 4.