Empty niche hypothesis implies invasive species:
“Fill unused ecological niches” for empty niche hypothesis implies invasive species. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Niche differentiation reduces overlap by separating species along resource, space, or time axes. Such partitioning can stabilize coexistence when each species performs relatively better under the conditions it uses most strongly. The remaining alternatives—“Rely on novel biochemical weapons”, “Benefit from enemy release”, “Depend solely on propagule pressure”—refer t
Ref: NCERT Biology Class 12, Ch. 15 Biodiversity and Conservation