Related by context. Frequent words. (Click for all words.) 57 temperate forests 55 deciduous forests 54 Boreal forest 53 lowland forests 52 drylands 52 terrestrial ecosystems 52 evergreen forests 51 Poyang Lake 51 virgin forests 51 wetland ecosystems 50 deciduous forest 50 glacial melt 50 forests 50 Soil erosion 50 boreal forests 49 biodiversity hotspot 49 Melting glaciers 49 forested wetlands 49 softwoods 48 plankton blooms 48 biodiversity hotspots 48 Controlled burns 48 coniferous trees 48 longleaf pines 48 brushland 48 tiger habitats 48 Greater Yellowstone Ecosystem 48 oak woodlands 48 Severe drought 48 melting snowpack 47 Arctic permafrost 47 boreal 47 GHG reductions 47 owl habitat 47 grassland habitat 47 habitat fragmentation 47 fuelwood 47 hydrological cycle 47 tropical forests 47 forest ecosystems 47 pasturelands 47 forbs 47 spotted owl habitat 47 woody debris 47 grasslands 47 pikas 47 Ponderosa pine 47 hardwood forests 47 Warming temperatures 47 vegetation 47 cordgrass 46 forest canopies 46 primeval forest 46 lodgepole pine 46 peatland 46 forest 46 tropical rainforests 46 panda habitat 46 river deltas 46 lodgepole 46 atmospheric methane 46 boreal forest 46 inter tidal 46 koala habitat 46 Amazonian rainforest 46 habitats 46 jack pine 46 humid tropical 46 prairie grasses 46 grassland 46 mountain pine beetles 46 phytoplankton blooms 46 sequoias 46 headwater streams 46 Invasive plants 46 conifer trees 46 deplete oxygen 46 ponderosa 45 hardwood forest 45 species 45 Tibetan Plateau 45 overgrown forests 45 vertebrate species 45 peat bogs 45 uplands 45 beetle infestation 45 soils 45 hemlock trees 45 coastland 45 mussel species 45 coniferous 45 species extinctions 45 watersheds 45 ponderosa pines 45 continental crust 45 atmospheric CO 44 ecosystems 44 rainfed 44 groundwater aquifers 44 equatorial Pacific Ocean 44 piñon