Question

Of the predators in the image, which one is most likely a keystone species?
pine marten, frog, ringtail, mountain lion

Answer 1

Among the predators listed—pine marten, frog, ringtail, and mountain lion—the mountain lion is most likely to be a keystone species. Keystone species have a disproportionately large impact on their environment relative to their abundance. Mountain lions play a critical role in controlling the populations of their prey, such as deer, which in turn helps maintain the health and balance of the ecosystem. By regulating herbivore populations, mountain lions indirectly support plant diversity and the overall health of their habitat.