Grassland is a natural community group that broadly characterizes several distinct natural communities. Grassland broadly includes: Bracken Grassland, Dry Prairie, Dry-mesic Prairie, Mesic Prairie, Sand Prairie, Wet Prairie, Wet-mesic prairie natural communities. Grasslands with high floral diversity that occur within large open landscapes may fare best: plants may shift locations and composition may fluctuate over time based on responses to climatic variables. This adaptive capacity is further enhanced if a site has (micro)topographical diversity.