NMDS ordination of plant life form group by ignition pattern within two south Puget Sound prairies. Each pane shows the change in vegetation community from pre-burn to post burn for each ignition pattern at each prairie. While part of the same ordination, communities are displayed separately by site and ignition pattern to highlight patterns in each; thus, axes 1 and 2 are the same in each of the four panels. Each point represents the origin-life form group composition within a quadrat. The base of each arrow is the pre-burn community, while the point of the arrow is the post-burn community. The length of each arrow shows the magnitude of change an individual quadrat experienced from pre- to post burn. Native perennial forb (NPF) and exotic perennial forb (EPF) richness are negatively correlated with Axis 1, and exotic annual forb (EAF) and exotic perennial grass (EPG) richness is positively correlated with Axis 2. GH = Glacial Heritage; TQ = Tenalquot.