Aim The biotic resistance hypothesis posits that greater native species richness limits invasions of exotic species. However, negative native-exotic relationships (NERRs) may reverse with increasing spatial scale, seemingly refuting the hypothesis. Here, we explore effects competitive interactions, environmental factors, habitat heterogeneity and vertical vegetation tiers on NERRs across scales...

In the context of the application of WFD, a scientific debate is growing about the applicability of biotic indices in coastal and transitional waters. In the present work, the question about the discriminating power of different biotic indices and the relationships with the structure and functioning of the macrobenthic community in a transitional environment is discussed. A time series of sampl...