A plant species can benefit from a pollinator that only visits its flowers because this pollinator will ensure that the flowers consistently receive the necessary pollen for fertilization. This relationship can lead to increased reproductive success, as the flowers are always being pollinated by a dedicated visitor, reducing the likelihood of missed pollination opportunities. Furthermore, having a specialized pollinator can decrease self-fertilization, which promotes greater genetic variation and diversity within the plant species. This genetic variation can enhance the species' resilience to environmental changes and diseases.
Overall, while specialization might limit pollination options, the dedicated relationship with a specific pollinator can enhance reproductive success and genetic diversity, making it beneficial for the plant species.