Figure 1.
Conceptual model of specialist and generalist responses to resource gradients.
A) Standard model; B) Alternative model. The models differ in that the alternative represents environmental restrictions on peak performance and total exploitation by the specialist. The figures are not drawn to scale but rather provide a relative comparison between specialists and generalists.
Figure 2.
Predicted probability of presence models for lynx and bobcat.
Predicted model of occurrence for A) Canada lynx and B) bobcat. Dark green colours represent areas of higher habitat suitability or higher probability of species presence.
Figure 3.
Niche breadth of Canada lynx and bobcats adjusted for background environment.
The difference between the actual niche breadth of Canada lynx (blue) and bobcat (red) with the background environment. A difference of 0 would indicate the niche breadth for the species was similar to the background environment. Niche breadth was calculated based on Levin’s concentration metric.
Figure 4.
Individual response curves of the Canada lynx and bobcat for environmental variables.
Response curves for Canada lynx (blue, solid line) and bobcat (red, dotted line) are given with the y axis representing probability of occurrence over the variables in units provided by the source of the data. The curves represent models developed for each species using only the corresponding variable.
Figure 5.
Area under the curve and peak performances of both species over each environmental variable.
A) Represents the average area under the curve value for Canada lynx (blue) and bobcat (red) for the response curves for each environmental variable. B) The average peak performance value for Canada lynx (blue) and bobcat (red) for the same response curves. Confidence intervals (95% CI) that are large enough to be displayed are visible on the graph.