Intense mowing management suppresses invader, but shifts competitive resistance by a native to facilitation

Interactions among native and invasive species may affect management outcomes goals. We implemented different mowing regimes to control the Solidago gigantea restore natural diversity, also examined interactions between a European competitor, Tanacetum vulgare in context of these regimes. Experimentally planted suppressed by 79% without management, suite reduced density 80–98% when was absent. But, added, invader not mowing. Put another way, mowed plots with Tanacetum, twofold over fivefold denser than Tanacetum. It is clear why effect shifted from competition absence disturbance facilitation intense management-associated disturbance, but other studies suggest that create plant–soil feedbacks favor Solidago. Evidence shows similar shifts under for species, are mechanistically either. speculate while leaving belowground facilitative effects unchanged, shifting net facilitation. When single-year were abandoned just 1 year, control, thus maintaining treatments time important successful management. Our results indicate mechanical substantially alter biotic resistance gained competition.