Effects of plant abundance on reproductive success in the biennial Sabatia angularis (Gentianaceae): spatial scale matters

Summary Small and low‐density populations often suffer significant reductions in reproduction, as exemplified by studies on rare and threatened species. While this phenomenon is less studied in common species, if general, it should not be restricted to those in peril. We addressed this assertion by examining the effects of plant abundance, measured at population‐level (population size, density) and local‐level (local neighbourhood size, LNS) spatial scales, on fruit set, seed set and subsequent reproductive success (RS) across 19 natural populations of the widespread biennial Sabatia angularis... Mehr ...