The widespread loss and fragmentation of habitats have caused significant declines
in biodiversity. Among plants, animal-pollinated species are particularly threatened
because of the negative effects of these factors on pollinators. Heterostyly is a
unique reproductive system defined by two or three floral morphs having a distinct
position of anthers and style. The spatial separation of reproductive organs, accompanied
by a self-incompatibility system, restricts self-pollination and favours pollinator-mediated
pollen transfer between different morphs. In this review, we synthesise knowledge
about the effects of loss in the area and connectivity of habitats, and related reduction
in population size on heterostylous plants.
