The prairie complex is a term used to describe a large expanse of grassland ecosystems that are characterized by their biodiversity, natural beauty, and ecological significance. Some antonyms for the prairie complex could include urbanization, desertification, and deforestation. Urbanization is the process of converting natural habitats, such as prairies, into urban areas, which results in the loss of biodiversity and ecological imbalance. Desertification is the process of turning productive land into a desert-like landscape, often caused by overgrazing, climate change, and human activities. Deforestation, on the other hand, is the removal of trees and other vegetation from a forest or woodland, which results in soil erosion, loss of habitats, and a decline in biodiversity.