How can maladaptive habitat choice generate source-sink population dynamics?

Several theoretical models have been proposed to describe population dynami cs in a spatially heterogeneous environment. The source-sink model is among the most popular. Diffendorfer recently summarized its assumptions and pre dictions. Given the model reviewed, he argued that source-sink population d ynamics arises if dispersal is somehow constrained. I offer an additional m echanism by suggesting that source-sink population dynamics can be generate d by anthropogenic changes in landscapes that occur so quickly that organis ms no longer make optimal habitat selection decisions. Individuals select t he same habitats as their ancestors but these decisions no longer provide h igh fitness because of human-induced changes in habitat quality, such as in creased rates of predation and/or parasitism. Provided that some of the hab itats selected are turned by human-induced changes into sink habitats, sour ce-sink population dynamics can emerge.