Contrasted Impacts of Yellow Flag Iris (Iris pseudacorus) on Plant Diversity in Tidal Wetlands within Its Native and Invaded Distribution Ranges

We conducted an intercontinental biogeographic survey to analyze the effects of invasive plant species in its native and invaded ranges. Our study system included tidal wetlands colonized by Iris pseudacorus L. (yellow flag iris, Iridaceae) along salinity gradients two estuaries European (Guadalquivir Estuary) North American (San Francisco Bay-Delta hypothesized I. would impart more negative community-level impacts on diversity range compared range. results show that colonization has very different communities In range, promoted increasing evenness richness. On contrary, greatly reduced being this reduction higher those with richness levels. view these results, urgent management practices are needed control eradicate from inland Sacramento-San Joaquin Delta Estuary since macrophyte is reducing at local landscape scales.