FAQ's & How To's

A prairie keystone species is a plant or animal that has an outsized effect on how the whole system functions. In historic prairie, the most obvious keystone animals were bison, prairie dogs, elk, and native pollinators. Bison shaped prairie through grazing, trampling, nutrient cycling, seed movement, and wallows. They kept grasses from becoming too uniform and created patches of different height and structure. Prairie dogs created short-grass habitat, mixed soil, clipped woody plants, provided burrows for other animals, and became prey for predators. Elk and deer added browsing pressure, while insects, especially native bees, butterflies, beetles, ants, and grasshoppers, moved energy through the food web and helped plants reproduce. In today’s restored prairie, most landowners do not have bison or prairie dogs, so management has to imitate some of those old pressures with fire, mowing, grazing, haying, and spot control. That is why a prairie cannot simply be planted and abandoned forever. Without disturbance, many prairies drift toward grass dominance, woody encroachment, or invasive cool-season grasses. The plant keystone species are just as important. Prairie is built on deep-rooted grasses and sedges, but wildlife diversity often depends heavily on the flowers. Milkweeds are essential host plants for monarch caterpillars and provide nectar for many insects. Goldenrods and asters are late-season powerhouses for bees, butterflies, and other pollinators. Sunflowers, coneflowers, blazing stars, bergamot, mountain mints, prairie clovers, and other legumes help feed insects across the growing season. Big bluestem, little bluestem, Indian grass, switchgrass, side-oats grama, prairie dropseed, and sedges provide structure, nesting cover, fuel for fire, and soil-building roots. The best prairie does not rely on one or two superstar species. It layers many keystone functions together: host plants, nectar plants, seed-producing plants, structural grasses, soil builders, grazers, pollinators, predators, and decomposers. A healthy prairie is not just a flower patch. It is a working food web.