Figures
Figure 1 | Local adaptation by the pathogen should result in pathogens being better adapted to invade and replicate within local hosts compared to novel hosts, on average. A) Density plot showing theoretical distributions of pathogen performance when pathogens are locally adapted to their hosts demonstrating that mean pathogen performance is higher during interactions with local hosts (solid red curve) relative to novel hosts (solid blue curve).B) Theoretical changes in performance that a single pathogen might experience when shifting from a local to a random novel host population (each gray line). Mean performance (dashed black line) is lower in the novel host because the pathogen is not locally adapted to invade it. However, certain stochastic host-pathogen interactions result in very high performance in a new host (represented by the solid purple line). Panel B is modified from Kaltz and Shykoff (1998). Both panels were made using the same randomly generated datasets of theoretical host-pathogen outcomes. Each curve in panel A was generated using 10000 points while panel B displays a random subset of 25 points for simplicity.