The Great Plains, once the largest grassland ecosystem in North America, has been fundamentally transformed over the past 150 years. What was a sea of native grasses stretching from Texas to the Dakotas, grazed by tens of millions of bison and shaped by wildfire, is now one of the most altered landscapes on the continent. The story of what happened involves agriculture, drought, population shifts, and a slow-moving water crisis that continues today.
The Grasslands Were Plowed Under
European-American settlers arriving in the mid-to-late 1800s converted vast stretches of native prairie into cropland. They plowed under deep-rooted grasses that had held the soil in place for thousands of years, replacing them with wheat and other annual crops. By the early 20th century, millions of acres of grassland had been turned over. The practice of plowing fields to a fine consistency before leaving them fallow made the exposed soil especially vulnerable to wind.
Overgrazing compounded the damage. Ranchers stocked cattle at densities the land couldn’t sustain, stripping the remaining grass cover. A government investigation by the Great Plains Committee identified both overgrazing and over-cultivation of small landholdings as root causes of what came next.
The Dust Bowl Exposed the Damage
When severe drought hit in the 1930s, the exposed, pulverized soil had nothing to anchor it. Massive dust storms swept across the plains, burying farms and forcing hundreds of thousands of people to migrate west. The Dust Bowl was not a natural disaster in the usual sense. It was the collision of drought with decades of land mismanagement.
The federal response reshaped how Americans thought about soil. The Soil Conservation Service launched demonstration projects teaching farmers to use terracing and contour plowing, techniques that slow water runoff and reduce erosion. The U.S. Forest Service planted trees on private land to create shelterbelts, rows of trees that block wind across open fields. State governments set up soil conservation districts so neighboring farmers could coordinate. Canada created the Prairie Farm Rehabilitation Administration with similar goals. These policies helped stabilize the land, but they didn’t reverse the fundamental conversion of grassland to cropland.
The Bison Nearly Disappeared
Before European settlement, an estimated 30 to 60 million bison roamed the Great Plains. By the late 1800s, commercial hunting and deliberate government policy had reduced the population to fewer than a thousand animals. Bison were keystone grazers. They shaped the prairie by cropping grass unevenly, wallowing in the dirt to create depressions that held rainwater, and fertilizing the soil as they moved. Removing them changed the ecosystem at every level.
Today, roughly 500,000 bison live in the United States, but 90 percent of them are privately owned livestock raised on ranches. The remaining animals are spread across small herds managed by state, federal, and Tribal governments. Eighty-five Tribes now have bison back on their lands, totaling around 20,000 animals. These herds are culturally and ecologically significant, but they’re a fraction of what the plains once supported.
Grassland Birds Are in Crisis
The conversion of prairie to farmland didn’t just affect soil and bison. Grassland birds, species that nest and forage in open grassland, have declined more steeply than any other bird group in North America. The primary drivers are habitat loss, agricultural intensification, woody encroachment (trees and shrubs moving into formerly open land), and the disruption of natural fire and grazing cycles that once kept the prairie healthy.
More recent threats have piled on. Energy development, neonicotinoid pesticides (widely used insecticides that contaminate seeds and soil), and climate change are now additional pressures. Despite decades of conservation work, grassland birds remain in crisis. They depend on large, continuous tracts of open grassland, and those tracts keep shrinking.
The Ogallala Aquifer Is Draining
Beneath the Great Plains lies the Ogallala Aquifer, one of the world’s largest underground water reserves. It stretches from South Dakota to Texas and supplies about 30 percent of the nation’s irrigation water. Since large-scale pumping began in the 1940s and 1950s, water levels have dropped dramatically, especially in Kansas, Texas, and parts of Nebraska.
The decline is ongoing. In western Kansas, the aquifer dropped nearly a foot on average in 2024 alone. Southwest Kansas saw declines of 1.36 feet in a single year, and the long-term average there is even worse: 1.67 feet per year since 1996. Northwest Kansas lost 1.16 feet in 2024 after a brief rebound the previous year thanks to unusually heavy rain. The aquifer recharges naturally at a tiny fraction of the rate it’s being pumped. In the southern portions, where the aquifer is thinnest, some wells have already gone dry.
This water crisis is slow-moving but irreversible on any human timescale. Farmers in the hardest-hit areas are already shifting to dryland farming or less water-intensive crops, but the economic consequences ripple through entire communities.
Rural Communities Are Hollowing Out
The Great Plains is one of the most sparsely populated regions in the country, and it’s getting emptier. Between 2010 and 2020, 67 percent of all nonmetropolitan counties in the U.S. lost population, and the agricultural heartland from the Dakotas to Kansas is at the center of that trend. Nearly half of all nonmetro counties lost population between 1990 and 2020.
The pattern is self-reinforcing. Young adults leave for cities in search of jobs and education. Because migration is selective of people in their reproductive years, the communities they leave behind age rapidly. Deaths eventually outnumber births, creating what researchers call a “downward demographic spiral.” Between 1980 and 2020, roughly 23 million rural residents were technically “lost” to reclassification as their growing counties were absorbed into metropolitan areas, but for the counties that didn’t grow, the losses are real and permanent.
Small towns across the plains have shuttered schools, hospitals, and main street businesses. The economic base that remains is increasingly concentrated in agriculture and energy, both of which employ fewer people than they once did.
Wind Energy Is Reshaping the Economy
The same flat, open landscape that made the Great Plains vulnerable to dust storms also makes it ideal for wind energy. The 15 Great Plains states with grasslands now host more than 42,000 wind turbines with a combined capacity of over 74,000 megawatts, representing 76 percent of total U.S. wind capacity. That’s enough to power roughly 7 million households.
For struggling rural communities, wind farms offer a lifeline. Farmers and ranchers earned more than $280 million in lease payments from wind companies in 2018 alone. Turbines can be placed alongside cropland, pasture, and even oil and gas wells, meaning landowners don’t have to choose between energy production and agriculture. Wind energy is expected to keep expanding across the region because the wind resource is enormous, costs are competitive, and landowners are willing participants.
The growth isn’t without tension. Wind farms and their associated transmission lines fragment grassland habitat, adding another pressure on the bird populations already in steep decline.
Climate Change Complicates the Picture
The Great Plains is projected to get hotter, with average temperatures rising significantly by mid-century under high-emissions scenarios. Precipitation patterns are expected to shift in contradictory ways: more total rainfall in some areas, but less snowpack in the mountains that feed rivers, and earlier snowmelt. The result is likely less water available during summer months, especially in the northern plains, right when crops and pastures need it most.
More frequent and intense storms are also projected, which means the rain that does fall may come in bursts that cause flooding and erosion rather than soaking into the soil. For a landscape already stressed by aquifer depletion and soil degradation, these changes compound existing problems.
Restoration Efforts Are Underway
The most ambitious attempt to reverse the transformation of the Great Plains is American Prairie, a nonprofit working to assemble a 3.2-million-acre ecologically functional preserve in central Montana. The project combines public land, private ranches, and Tribal lands with the goal of supporting a herd of 10,000 free-roaming bison. If completed, it would be the largest nature reserve in the lower 48 states.
On the farming side, regenerative agriculture practices are gaining traction. No-till farming, which leaves the soil undisturbed instead of plowing it each season, reduces erosion and builds organic matter over time. Cover crops planted between cash crop seasons keep roots in the soil year-round, improving water retention and reducing the need for chemical inputs. Some operations in Nebraska have eliminated tillage entirely and put cover crops on nearly 90 percent of their fields while cutting chemical weed control by 95 percent.
These efforts are encouraging but still represent a small fraction of total farmland. The economic incentives in industrial agriculture continue to favor maximizing short-term yields, and the infrastructure of grain elevators, commodity markets, and crop insurance is built around conventional practices. Changing the trajectory of the Great Plains will require shifting those incentives at a scale that matches the landscape itself.