Related by context. Frequent words. (Click for all words.) 51 habitat degradation 50 Cook Inlet belugas 49 overhunting 49 intersex fish 49 ocean acidity 48 sea otters 48 dissolved oxygen levels 48 scaup 48 Soil erosion 48 bycatch 48 sagebrush habitat 47 caribou herds 47 Adelie penguins 47 mortality 47 Yellowstone ecosystem 47 overfishing pollution 46 caribou herd 46 seagrasses 46 nutrient loading 46 guillemots 46 harbor porpoises 46 retreating glaciers 46 amphibian populations 46 Steller sea lions 46 Steller sea lion 46 wood stork 46 grassland birds 45 bee populations 45 marbled murrelet 45 pupfish 45 species extinctions 45 Overfishing 45 beluga sturgeon 45 otters 45 honeybee population 45 musk oxen 45 mortalities 45 mountain glaciers 45 native brook trout 45 predation 45 eelgrass 45 frogs toads 45 leatherbacks 45 atmospheric methane 44 welfare caseloads 44 snowshoe hares 44 red legged frogs 44 glacial melt 44 glacial melting 44 acidification 44 hatchery salmon 44 owl habitat 44 nutrient runoff 44 belugas 44 habitat fragmentation 44 false killer whales 44 delta smelt 44 aquatic habitat 44 krill 44 marine invertebrates 44 glacial retreat 44 ribbon seals 44 habitat 44 polar bear populations 44 Servheen 44 polar bear habitat 43 low birthweight babies 43 Sage grouse 43 amphibian species 43 de ath 43 walruses 43 Greenland glaciers 43 seals sea lions 43 Mule deer 43 postoperative complications 43 salmonids 43 Pacific walrus 43 polar bears 43 Coho salmon 43 loggerhead sea turtles 43 Hospitalizations 43 longline fishing 43 glaciers 43 seabird 43 narwhal 43 freshwater 43 sea lions 43 apex predators 43 toothed whales 43 Melting glaciers 43 Sperm whales 42 longfin smelt 42 Stomach cancer 42 overfishing 42 marine mammals 42 Preterm birth 42 nutrient pollution 42 whales 42 threadfin shad 42 salmonid 42 overharvesting