The concept of 'habitat islands' can apply to:
“Any isolated habitat” for the concept of 'habitat islands' can apply to. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. At equilibrium, species identities can continue to turn over even when richness is approximately stable. The model predicts a balance of rates, not an absence of colonization or extinction. The remaining alternatives—“Only oceanic islands”, “Only isolated mountain peaks”, “Only marine ecosystems”—refer to different states, processes, or scales and therefore do not express the s
Ref: Biogeography, Lomolino et al., 5th Ed., Ch. 5-8