Taxonomic similarity, more than contact opportunity, explains novel plant–pathogen associations between native and alien taxa

摘要: Novel associations between plants and pathogens can have serious impacts on managed natural ecosystems world-wide. The introduction of alien increases the potential for biogeographically novel plant-pathogen to arise when are transmitted from native plant species vice versa. We quantified recorded in New Zealand over last 150 yr (fungi, oomycetes plasmodiophorids) vascular plants. examined extent which taxonomic similarity, pathogen traits, contact opportunity sampling effort could explain number associates host species. were common; approximately one-third surveyed with at least one associate. Native had more than Taxonomic similarity flora total (a measure effort) best explained among frequency importance as an explanatory variable emphasize need effective monitoring risk assessment tools mitigate environmental economic impact associations.