Related by context. Frequent words. (Click for all words.) 69 lodgepole pines 67 lodgepole pine 63 mountain pine beetles 62 aspen 61 aspens 60 aspen trees 60 pine beetles 58 beetle infestation 58 boreal forests 57 mountain pine beetle 56 ponderosa pines 56 bark beetle 56 conifers 56 bark beetles 55 cheatgrass 55 pine beetle 54 warmer winters 54 bark beetle infestation 53 hardwood forests 53 pine forests 52 boreal forest 52 hemlock trees 52 forests 51 lichen 51 knapweed 51 clearcuts 51 Mountain Pine Beetle 51 juniper trees 51 forbs 51 understory 50 ponderosa pine 50 leafy spurge 50 forest ecosystems 50 grassland 50 junipers 50 grasslands 50 terrestrial ecosystems 50 scrub oak 49 virgin forests 49 sagebrush 49 snowshoe hare 49 pine plantations 49 oak woodlands 49 Phytophthora 49 conifer 49 woodland caribou 49 herbaceous plants 49 adelgid 49 drylands 49 tamarisk 49 deciduous trees 49 birch trees 48 Scotch pine 48 forested 48 boreal 48 sequoias 48 pine trees 48 Arctic tundra 48 hemlocks 48 fireweed 48 Douglas fir 48 catastrophic wildfires 48 woody plants 48 whitebark pine 48 snowpacks 48 peat bogs 48 spruce trees 48 temperate zones 48 biome 48 larch 47 mountain ranges 47 amphibian species 47 pikas 47 megafauna 47 overgrazed 47 vegetation 47 black footed ferrets 47 ungulates 47 giant sequoias 47 prairie grasses 47 alpine meadows 47 hotter summers 47 tallgrass prairie 47 poplar trees 47 insect infestations 47 pronghorns 47 pine forest 47 cottonwoods 47 hardwood forest 46 semi arid 46 Book Cliffs 46 Rocky Mountains 46 sugar maples 46 beech trees 46 perennial grasses 46 temperate regions 46 elm trees 46 juniper 46 Grizzly bears 46 caribou herd 46 lichens