Effects of biotic interactions and dispersal on the presence-absence of multiple species

摘要: Abstract One of the important issues in ecology is to predict which species will be present (or absent) across a geographical region. Dispersal thought have an influence on range limits species, and understanding this problem multi-species community with priority effects (i.e. initial abundances determine presence-absence) challenging task because dispersal also interacts biotic abiotic factors. Here, we propose simple model investigate joint interactions presence-absence. Our results show that can substantially expand ranges when forces are present; consequently, coexistence multiple possible. The exhibits ecologically interesting effects, mediated by intense interactions. In absence dispersal, competitive exclusion all but one occurs. We find reduces occur no-dispersal case promotes species. These still prevalent communities presence process. illustrate existence threshold values strength transcritical bifurcations), different presence-absence without dispersal.