Related by context. Frequent words. (Click for all words.) 59 lowland forests 57 deciduous forests 56 biodiversity hotspot 56 migratory bird species 55 coniferous forests 54 grassy plains 54 ponderosa 53 temperate forests 53 savannahs 53 montane 53 Invasive plants 52 forested wetlands 52 wetland ecosystems 52 deciduous forest 52 cordgrass 52 evergreen forests 52 aspen stands 52 Amazonian rainforest 52 forest canopies 51 vegetation 51 biodiversity hotspots 51 grasslands 51 Namib Desert 51 hardwood forests 51 amphibian species 51 jack pine 51 savannas 51 longleaf pine 51 Ponderosa pines 51 forest ecosystems 50 longleaf pines 50 temperate rainforest 50 arid lands 50 semi arid regions 50 cypress swamp 50 coniferous trees 50 savanna 50 lodgepole 50 avian species 49 biologically diverse 49 virgin forests 49 orchid species 49 fynbos 49 savannah 49 deltaic 49 understory 49 hemlock trees 49 tropical rainforests 49 Greater Yellowstone Ecosystem 49 lush vegetation 49 drylands 49 indigenous flora 49 species 49 forbs 49 freshwater ponds 49 hardwood trees 49 aspen trees 49 humid tropical 48 biodiverse 48 sooty mold 48 escarpments 48 barrens 48 freshwater ecosystems 48 acacias 48 lichen 48 amphibian populations 48 subtropical regions 48 grasses 48 lodgepole pine 48 forest canopy 48 ponderosa pines 48 sequoias 48 riparian zones 48 shrubby 48 riparian vegetation 48 Phragmites 48 grassland habitat 48 eucalyptus trees 48 cassowary 47 Omo River 47 eucalypts 47 Eucalyptus trees 47 melaleuca 47 tamarisk 47 beetle infestations 47 frog species 47 piñon 47 lodgepole pines 47 oak woodlands 47 grazing pastures 47 grassland 47 Boreal forest 47 ecosystems 47 hydrological cycle 47 cattail 47 freshwater marshes 47 buffelgrass 47 plankton blooms 47 Soil erosion 47 Invasive species 47 elephant herds