In the absence of predators, species are bound by the resources they can find in their environment, but this does not necessarily control overpopulation, at least in the short term. An abundant supply of resources can produce a population boom followed by a population crash. Rodents such as lemmings and voles have such cycles of rapid population growth and subsequent decrease.[citation needed] Snowshoe hares populations similarly cycled dramatically, as did those of one of their predators, the lynx.[citation needed]