Interactions between propagule pressure and seed traits shape human-mediated seed dispersal along roads.

摘要: Abstract Human-mediated dispersal along the road network is a crucial process in population dynamics of roadside vegetation and during plant invasions. The potential for species to be dispersed by vehicles is, however, difficult quantify. predictive power categorical classification schemes human-mediated limited as many that are usually attributed particular primary vectors may become subject very different secondary owing human activity. Analysing seed traits promote transport could overcome these limitations. However, analysis has account divergent chance results from propagule pressures corridor. To reveal effects their interplay with pressure on magnitude vehicles, we compared regional frequencies set were control not but present same study area. We then used comparison intentionally unintentionally introduced flora Berlin. Different influenced vehicle its magnitude. While was most important determining transport, small mass size best predicted absolute vehicles. nonnative least dependent pressure. Seed similarly reflected Berlin flora. Mean lower entire flora, whereas it higher species. This suggests unintentional introduction pre-selects further spread adhesive dispersal. Probability can dispersal-related traits. effect strongly depends highlights need analyse interactions between