Concept

Pollination

The transfer of pollen from a flower's male anthers to the female stigma — the act that makes seed and fruit possible. Performed by wind for some plants (grasses, oaks, pines, conifers), by water for a few aquatic species, and by animals for the great majority of flowering plants on Earth. Approximately 75–80% of flowering plant species, and approximately one-third of human food crops by volume, depend on animal pollination — primarily by bees, but also by butterflies, moths, hummingbirds, bats, beetles, and flies. The coevolution of flowers and pollinators is one of the oldest and most-elaborate mutualisms in terrestrial ecology.

Mechanisms of pollen transfer

Wind pollination (anemophily) — grasses, sedges, most conifers, oaks, walnuts, hickories, cottonwoods, and ragweeds. Pollen is light, abundant, dry; flowers are inconspicuous, with no nectar or scent. The pollen lottery — most never reaches a female flower; success requires sheer abundance.
Water pollination (hydrophily) — a few aquatic species (eelgrass, hornwort) release pollen into water; rare overall.
Animal pollination (zoophily) — bees, butterflies, moths, beetles, flies, hummingbirds, bats, and others move pollen attached to their bodies as they visit flowers for nectar, pollen, or other rewards. Most flowering plants. The relationship is mutualistic: pollinators get food, plants get reproduction.

Coevolution

Flowering plants (angiosperms) emerged ~140 million years ago and rapidly diversified alongside their pollinators. The relationship has shaped both:

Flower morphology — colors, shapes, scents, nectar-guide patterns, bloom timing all match the visual, olfactory, and behavioral capacities of specific pollinator groups
Pollinator morphology — proboscis length, body hair patterns, color vision, flight abilities all match the flowers a species depends on
Bloom timing and flight phenology — many plant-pollinator pairs are tightly synchronized seasonally

Some plant-pollinator relationships are highly specialized — yucca and yucca moth, fig and fig wasp, Madagascar’s Angraecum sesquipedale orchid and the long-tongued [[hawkmoth|hawkmoth]] Darwin predicted. Most are more flexible.

Food crops

Approximately one-third of human food crops by volume require animal pollination. Among the most pollinator-dependent: almonds, apples, avocados, blueberries, cherries, cucumbers, melons, peaches, pears, plums, pumpkins, squash, strawberries, tomatoes (greenhouse). The grain staples (wheat, corn, rice) are wind-pollinated and don’t require pollinators directly, though their associated cropping systems often do.

The economic and food-security implications: a substantial collapse in pollinator populations would not eliminate human food but would make many of the most-nutritious foods scarce and expensive.

Sources

The Forgotten Pollinators, Stephen Buchmann and [[gary-paul-nabhan|Gary Paul Nabhan]] (Island Press, 1996)
USDA Pollinator Health technical materials
The Bees in Your Backyard, Joseph Wilson and Olivia Messinger Carril (Princeton, 2015)

Rooted in life.

What links here, and how

Inbound connections from across the wiki, grouped by lens and by relationship. These appear automatically — every entity page declares what it links to, and that data populates here on the targets.

Scientific

subset of

Hummingbird pollination hummingbird pollination is a specialized form of vertebrate pollination, restricted to the Americas

substrate of

Pollinator pollinators are the agents of pollination

Practical

shares approach with

Honey the honey jar is a side effect of the pollination service

3 inbound links · 2 outbound