Community organization of arvicoline rodents in northern Alaska [singing voles, Microtus miurus, Microtus oeconomus, Clethrionomys rutilis, Dicrostonyx rubricatus, Lemnus sibiricus]

alaska aliment pour animaux animal ecology animal population arbuste arbustos biological competition campagnol ecologia animal fauna faune feeds gramineas graminee grasses habitat habitats leming lemming lemmings piensos population animale population density population dynamics shrubs topillos toundra tundra vegetation voles