A plant species can benefit from a pollinator that only visits its flowers in several ways:
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Less Competition for Pollinators with Other Species: When a pollinator is specialized to visit only one plant species, the plant faces reduced competition for those pollinators compared to situations where multiple species share the same pollinators. This exclusivity can increase the likelihood of successful pollination since the plant does not have to compete for attention from generalized pollinators.
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The Flowers Always Having a Pollinator: A specialized pollinator can provide a reliable and consistent source of pollination for the plant, ensuring that flowers are effectively pollinated whenever they bloom. This can lead to higher rates of reproductive success and improved seed set, which benefits the plant's ability to propagate.
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Decreased Self-Fertilization, Allowing for Greater Genetic Variation: If a specialized pollinator primarily transfers pollen from one flower to another of the same species rather than self-pollinating, it promotes cross-pollination. This can enhance genetic diversity within the plant population, which can increase resilience to environmental changes and diseases.
In summary, having a specialized pollinator can reduce competition, ensure consistent pollination, and promote genetic diversity—each of which contributes to the overall fitness and adaptability of the plant species.