Related by context. Frequent words. (Click for all words.) 56 Sea otters 56 amphibian populations 55 overhunting 52 salmon fisheries 50 species extinctions 50 bee populations 50 seagrasses 49 herring fishery 49 toxic algae bloom 49 caribou herd 49 caribou herds 49 overharvesting 49 ocean ecosystems 48 Steller sea lion 48 honeybee population 48 marine ecosystem 48 ocean acidity 48 populations 48 longfin smelt 47 whale strandings 47 honeybee colonies 47 overfishing pollution 47 marine ecosystems 47 northern spotted owls 47 sea otter 47 trophic 47 mountain caribou 47 terrestrial ecosystems 47 Cook Inlet belugas 47 predation 46 cod fishery 46 freshwater ecosystems 46 kelp forests 46 sea otters 46 guillemots 46 red legged frogs 46 atmospheric methane 46 harbor porpoises 46 Overfishing 46 jumbo squid 45 Soil erosion 45 polar bear populations 45 elephant poaching 45 Vibrio 45 mammals 45 habitat fragmentation 45 Yellowstone ecosystem 45 migratory habits 44 anoxia 44 insect populations 44 habitat degradation 44 apex predators 44 salmon fishery 44 pelagic fish 44 wolf populations 44 beluga sturgeon 44 marine organisms 44 coastal ecosystems 44 Populations 44 Steller sea lions 44 spotted owl habitat 44 Greenland glaciers 44 Coho salmon 44 bioaccumulation 44 waterbirds 44 Everglades ecosystem 44 dissolved oxygen levels 44 delta smelt 43 Ocean acidification 43 species 43 coastal marshes 43 wetland ecosystems 43 extinctions 43 deer herds 43 threadfin shad 43 breeding colonies 43 marbled murrelet 43 coastwide 43 toxic algae blooms 43 aquatic habitats 43 salmonids 43 Delta smelt 43 coastal estuaries 43 Humpback whales 43 Boris Worm 43 nesting pairs 43 lobster fishery 42 biologists 42 mortalities 42 ecological 42 ecosystems 42 biota 42 chinook salmon 42 overfishing 42 federally endangered species 42 chytrid fungus 42 loggerhead sea turtles 42 plankton 42 Olive Ridley turtles 42 atmospheric CO 42 endocrine disruption