The central and eastern grassland and savanna regions of the U.S. include the number one crop production states for corn, wheat, sorghum, soybeans, peanuts and cotton. Six of the top ten forest production states are in the East, and the Fescue Belt has the highest concentration of livestock producers and livestock in the country. Southeastern grasslands are the most diverse biologically in the U.S. but also the most imperiled with up to 90% in degraded condition or lost. Major threats include: habitat loss and fragmentation; climate change; alterations to natural land disturbance regimes; and invasive species.