Related by context. Frequent words. (Click for all words.) 63 lodgepole pine 63 beetle infestation 61 mountain pine beetles 59 aspen 59 lodgepole pines 58 aspen trees 56 pine beetles 56 insect infestations 55 bark beetles 55 bark beetle 55 bark beetle infestation 54 ponderosa pines 54 catastrophic wildfires 54 beetle 54 mountain pine beetle 54 boreal forests 53 forests 53 vegetation 53 conifers 52 forest ecosystems 52 clearcuts 51 pine beetle 51 Prescribed burns 51 insect infestation 51 pine trees 51 woody debris 50 forest 50 understory 50 forest fires 50 adelgid 50 foresters 50 sequoias 50 hardwood forests 50 knapweed 50 winterkill 50 timber harvest 50 cheatgrass 50 pine plantations 50 hemlock trees 50 timber harvests 49 spruce trees 49 pine forests 49 defoliated 49 forbs 49 timber harvesting 49 grassland 49 deciduous trees 49 walnut trees 49 ponderosa pine 49 oak woodlands 49 trees 48 beech trees 48 Douglas fir 48 lichen 48 oak trees 48 dieback 48 forestry 48 forested 48 beetles 48 wildfires 48 longleaf pine 48 Sudden Oak 48 hardwood trees 48 blowdown 48 prescribed burns 48 sugar maples 48 warmer winters 48 hemlocks 48 cottonwood trees 48 poplar trees 47 woodlands 47 eucalypts 47 boreal forest 47 spotted owls 47 birch trees 47 rangeland 47 honeybee colonies 47 defoliation 47 grasslands 47 conifer 47 tinder dry 47 pine plantation 47 rangelands 47 aspens 47 whitebark pine 47 defoliate 47 milder winters 47 invasive weed 46 birches 46 emerald ash borers 46 stripe rust 46 lichens 46 gypsy moth 46 fungal disease 46 cottonwoods 46 herbaceous plants 46 gypsy moths 46 forest thinning 46 terrestrial ecosystems 46 grasses 46 fungus