Related by context. Frequent words. (Click for all words.) 61 species 58 habitat 55 ecosystems 55 invertebrates 54 federally endangered 54 black footed ferret 54 habitats 54 nesting habitat 53 critically endangered species 53 red cockaded woodpecker 53 wetland habitats 53 endangered species 53 seagrasses 51 terrestrial ecosystems 51 aquatic habitats 51 Phytoplankton 51 marine ecosystem 51 pollinators 51 zooplankton 51 aquatic ecosystems 50 coastal ecosystems 50 subspecies 50 habitat fragmentation 50 marine ecosystems 50 filter feeders 50 ocean ecosystems 50 ecosystem 50 biodiversity 50 plankton 49 vertebrate species 49 endangered 49 piping plover 49 aquatic insects 49 migratory species 48 whitebark pine 48 aquatic ecosystem 48 woodland caribou 48 freshwater ecosystems 48 habitat designation 48 critically endangered 48 avian species 48 marbled murrelet 48 greater sage grouse 48 caribou herd 48 kelp forests 48 aquatic species 47 shorebirds 47 omnivores 47 mammals 47 phytoplankton 47 plover 47 waterbirds 47 bobwhite quail 47 black footed ferrets 47 wildlife ecologist 47 wildlife habitat 47 biota 47 genetically distinct 47 Endangered 47 salmonids 47 wetland habitat 47 wildlife habitats 47 fairy shrimp 47 burrowing owl 46 leatherback turtles 46 Critically Endangered 46 nitrogen fixation 46 wading birds 46 intertidal 46 migrating waterfowl 46 ecological 46 scrub jay 46 sea otters 46 benthic 46 insect populations 46 krill 46 habitat degradation 46 estuarine 46 ecology 46 grazers 46 bird species 46 damselflies 46 leatherbacks 45 marine organisms 45 eelgrass 45 coastal marshes 45 estuaries 45 habitat restoration 45 breeding colony 45 carbon sinks 45 Important Bird 45 invasive species 45 eel grass 45 ptarmigan 45 forage 45 trophic 45 salt marshes 45 herbivores 45 National Wildlife Refuges 45 aquatic organisms 45 petrels