The primary ecosystem found in the Midwest U.S. is the temperate grassland, specifically known as the prairie. This region is characterized by flat lands, rich soil, and varied wildlife, making it ideal for agriculture. The grasslands support a range of flora and fauna, including grasses, wildflowers, and various animal species. Human activities like farming and urban development have significantly influenced this ecosystem, leading to habitat changes. Preserving these grasslands is vital for maintaining biodiversity and ecosystem health.