3. The Dance of Co-Evolution: How Bees and Flowers Shaped Each Other
A classic example of co-evolution—that is, the interaction between two species—bees and flowers change in response to one another. The amazing variety of bees and flowering plants we now know results from this complex dance of adaptation.
Flowers changed to maximise their visits as bees developed to be more specialised pollinators. Many plants evolved intricate floral designs that complemented the scale and form of their bee pollers. Some orchids, for instance, developed long, narrow tubes that bees with similarly long tongues could access exclusively. This guaranteed that the nectar could only be reached by the most efficient pollinators, therefore raising the possibilities of successful pollination.
This co-evolutionary process depended much on colours. Though invisible to the human eye, bees can see UV light. Many flowers developed patterns seen only in UV light that function as “nectar guides” guiding bees towards their prise. Often shaped like bullseyes or landing strips, these patterns enabled bees to more effectively find the nectar, therefore benefiting the plant and the pollinator.
Scent has turned out to be a crucial component of the bee-flower link. Plants developed sophisticated combinations of volatile organic chemicals to draw particular pollers from a distance. Some flowers even attracted men by mimicking the pheromones of female bees, therefore guaranteeing pollination without providing a reward.
On the bee front, certain species developed specific structures to maximise specific kinds of blossoms. Whereas some bees acquired strong jaws to get pollen from tightly closed flowers, others developed longer tongues to reach nectar in deep floral tubes. Bees’ size and form also varied, allowing many species to specialise in pollinating various kinds of plants.
Intricate pollination syndromes—where a suite of floral features evolved to attract and use particular kinds of pollinators—result from this co-evolutionary process. As each species grew more specialised and dependent, these syndromes helped to preserve the variety of both plants and pollinators.
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