Journal Article 2 Research Support, Non-U.S. Gov't 2 alternative stable state Lemmus 1 Microtus 1 Myodes 1 Rangifer 1 mehr ... black spruce 1 climate change 1 climate warming 1 grazer 1 immaturity risk 1 jack pine 1 positive feedback 1 regime shift 1 resistance 1 self-regulation 1 spatially explicit state-and-transition simulation model 1 tundra vegetation 1 weniger ...