Figure 1 | Scientific Reports

Figure 1

From: Species distribution models throughout the invasion history of Palmer amaranth predict regions at risk of future invasion and reveal challenges with modeling rapidly shifting geographic ranges

Figure 1

Niche breadth and shift of native versus invaded niche. Axes are principal components of CliMond variables included in the model. The total extent of the background environment in the native region is outlined in grey (solid = total niche space; dashed = 90% of extent). The total extent of the background environment in the invaded region is outlined in dark green (solid = total niche space; dashed = 90% of extent). The environmental space unique to the native niche is shown in gray (9.1% weighted loss of the original niche), the area of environmental space shared between the native and invaded niche is shown in olive-green (87% of the total weighted invaded niche), and the region of environmental space newly occupied by the invaded niche is shown in green (i.e. niche expansion; 13% if the total weighted invaded niche). The arrows represent the shift in the weighted centroid of occurrences from native to invaded niche (dark solid arrow), and the shift in the center of environmental space (lighter dashed arrow). The weighted niche overlap, calculated using Schoener’s D, was 0.32.

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